Attach 4 T.O 1.1.691 Chapter 3.pdf

CHAPTER 3

PREVENTIVE MAINTENANCE

SECTION I INTRODUCTION

3.1 PREVENTIVE MAINTENANCE PROGRAM.

As directed by DAFI 21-101, and equivalent MAJCOM and/or Wing/Group specific supplements, the prevention and control of corrosion on aircraft missiles and related equip-ment is a command responsibility. Each command must place special emphasis on the importance of the corrosion control program and lend its full support to ensure that corrosion prevention and control receives sufficient priority to be ac-complished along with other required maintenance.

3.1.1 Preventive Maintenance. Aluminum and magne-

sium alloys found in aviation equipment will corrode if salt deposits, other corrosive soils, or electrolytes are allowed to remain on their surfaces. To prevent corrosion, a constant cycle of cleaning, inspection, operational preservation, and lubrication must be followed. Prompt detection and removal of corrosion will limit the extent of damage to aircraft com-ponents. An effective preventive maintenance program re-quires all of the procedures specified in this chapter, but also includes corrosion removal, paint removal, surface treatment, sealing, and painting. A disciplined preventive maintenance program includes the following:

a. Regularly scheduled aircraft washing as specified in Table 3-1.

b. Regularly scheduled cleaning or wipe down of all ex-posed unpainted surfaces, such as landing gear struts and actuating rods of hydraulic cylinders with a com-patible fluid or lubricant as specified by system spe-cific technical orders.

c. Keeping low-point drains open.

d. Inspection, removal, and reapplication of corrosion preventive compounds (CPC’s) on a scheduled basis.

e. Earliest detection and repair of damaged protective coatings.

f. Use clean/fresh potable water for all aircraft, missile, and equipment washing and rinsing operations.

g. If using closed-loop water recycling systems to wash aircraft, aerospace components, or aerospace support equipment, water shall meet the following require-ments and be tested every 30 days to detect any build-up of corrosive salts and/or other contaminants.

Any abnormal readings should be reported to the AF- CPCO at afcorr@us.af.mil for waiver consideration.

(1) Chloride content shall be 400 mg/L maximum (somewhat higher than EPA potable drinking wa-ter standard of 250 mg/L).

(2) pH shall be between 6.5 and 8.5.

(3) Total dissolved solids (TDS) content shall be 500 mg/L maximum.

(4) Total suspended solids (TSS) content shall be 5 mg/L maximum.

(5) The Langlier Saturation Index shall be slightly above 0.

(6) The biological oxygen demand (BOD) concentra-tion shall be 5 mg/L maximum.

(7) Adequate disinfection of the water shall be pro-vided to control the growth of microorganisms in the water.

(8) The water hardness shall be between 75 and 150 mg/L as CaCO3.

(9) The total petroleum hydrocarbon (TPH) content shall be 10 mg/L maximum.

h. Use padded panel racks to store panels/parts for air-craft and equipment during maintenance; use protec-tive measures to prevent abrasions/scratches resulting from placement of parts, tools, tool boxes, etc., on wings, fuselage or other aircraft surfaces.

TO 1-1-691

Change 19 3-1

Attach 4, Dec 11 2024

Table 3-1. Aircraft Wash Intervals

Air Base Name and Location Wash Interval by Severity

* Asterisks before Air base Name and Location designates environments considered as SWA and fall under Chapter 9.

Severe (30 Days)

Moderate (90 Days)

Mild (180 Day)

*Afghanistan (All Locations) X *Aj Taif, SA X *Al Dhafra UAE X *Al Jouf, SA X *Al Udeid AB QATAR X *Ali Al Salem Kuwait X Allen C. Thompson Fld.; Jackson, MS X Altus AFB, OK X Anderson AFB, GU X Anchorage IAP, AK X Andrews AFB, MD (Washington DC) X *As Sulayyil, SA X Atlantic City, NJ X Aviano AB, IT X *Bahrain X *Balad, Iraq X Bangor IAP, ME X Barksdale AFB; Shreveport, LA X Barnes M. Apt.; Westfield, MA X Battle Creek, MI X Beale AFB; Marysville, CA X Birmingham Apt.; AL X Boise Air Term., ID (ANG) X Bradley IAP; Windsor Locks, CT X Brindisi/Casale AB, IT X Buckley ANGB; Denver, CO X Burlligton IAP, VT X Byrd Fld.; Richmond,VA X *Camp Lemonnier, Djibouti X Cannon AFB; Clovis, NM X Capital Mun. Apt.; Springfield, IL X Channel Island; Port Hueneme NAS, CA X Charleston AFB, SC X Charleston Apt.; WV X Cheyenne Apt.; WY X Columbus AFB, MS X Creech AFB, NV X Curacao Netherlands Antilles X *Cyprus International Airport X Danelly Fld.; Montgomery, AL X Davis-Monthan AFB; Tucson, AZ X Des Moines IAP, IA X *Dhahran, SA X Diego Garcia X Dobbins ARB; Marietta, GA X Douglas IAP; Charlotte, NC X Dover AFB, DE X

TO 1-1-691

3-2 Change 14 All data on pages 3-2.1 through 3-2.2 deleted

Table 3-1. Aircraft Wash Intervals - Continued

* Asterisks before Air base Name and Location designates environments considered as SWA and fall under Chapter 9.

Severe (30 Days)

Moderate (90 Days)

Mild (180 Day)

Duluth IAP, MN X Dyess AFB; Abilene, TX X Eareckson (Shemya) AFB, Aleutian Is., AK X East. WV Reg. Apt.; Martinsburg, WV X Edwards AFB; Rosamond, CA X Eglin AFB; Valparaiso, FL X Eglin AFB (Aux Fld.; #3), FL X Eielson AFB, AK X Ellington Fld.; Houston, TX X Ellsworth AFB; Rapid City, SD X Elmendorf AFB; Anchorage, AK X Fairchild AFB; Spokane, WA X Fairford, UK X Falcon AFB, CO X Forbes Fld.; KS X Fort Kutaka Army Base, AZ X Fort Rucker, Enterprise, AL X Fort Smith Mun. Apt.; AR X Fort Wayne Apt.; IN X Francis E. Warren AFB; Cheyenne, WY X Fresno Air Term., CA X Geilenkhirchen, GE X Gen. Mitchell IAP; Milwaukee, WI X Grand Forks AFB; Emarado, ND X Great Falls IAP, MT X Greater Peoria Apt.; IL X Griffiss AFB; Rome, NY X Grissom ARB; Peru, IN X Hancock IAP; Syracuse, NY X Hanscomb AFB; Bedford, MA X Harrisburg IAP, PA X Hector IAP; Fargo, ND X Hickam AFB; Honolulu, HI X Hill AFB; Ogden, UT X Holloman AFB; Alamogordo, NM X Homestead ARB, FL X Howard AB; Panama X Hulman Reg. Apt.; IN X Hurlburt Fld.; Fort Walton Beach, FL X *Incirlick AB, Turkey X Istres AB, France X Jacksonville IAP, FL X *Jeddah, SA X Joe Foss Fld.; Sioux Falls, SD X Kadena AB, Japan X Keesler AFB; Biloxi, MS X Key Fld.; Meridian, MS X

Change 14 3-3

* Asterisks before Air base Name and Location designates environments considered as SWA and fall under Chapter 9.

Severe (30 Days)

Moderate (90 Days)

Mild (180 Day)

*Khamis Mushay, SA X *Khandahar Afghanistan X *Kiruk Iraq X *King Khalid, SA X Kingsley Fld.; Klamoth Falls IAP, OR X Kirtland AFB, NM; Albuquerque, NM X Kulis ANGB, Anchorage, AK X Kunsan AB; S. Korea X Lackland AFB, TX X Lajes Fld.; Azores, Portugal X Lambert Fld.; St. Louis IAP, MO X Langley AFB; Hampton, VA X *Larnaka International Apt.; Cyprus X Laughlin AFB; Del Rio, TX X Lincoln Mun. Apt.; NE X Little Rock AFB, AR X Luke AFB; Glendale, AZ X MacDill AFB; Tampa, FL X Malmstrom AFB; Great Falls, MT X Manas Kyrgystan X Mansfield Lahm Apt.; OH X Mantas Ecuador X March ARB; Riverside, CA X Martin St. Apt.; Baltimore, MD X Maxwell AFB; Montgomery, AL X McChord AFB; Tacoma, WA X McConnell AFB, Wichita, KS X McEntire ANGB; Columbia, SC X McGhee Tyson Apt.; Alcoa, TN X McGuire AFB; Wrightstown, NJ X McMurdo Station Antarctica X Memphis IAP, TN X Minot AFB, ND X Minn.-St. Paul IAP, MN X Misawa AB, Japan X Moffett Fld.; CA X Moody AFB; Valdosta, GA X Moron AB, Spain X Mountain Home AFB; Boise, ID X NAS Fort Worth, TX X NAS Keflavik, Iceland X NAS New Orleans, LA X NAS Pensacola, FL X NAS Sigonella; Sicily, Italy X Nashville Met. Apt.; TN X Nellis AFB; Las Vegas, NV X Newburgh Apt.; NY X

3-4 Change 14

* Asterisks before Air base Name and Location designates environments considered as SWA and fall under Chapter 9.

Severe (30 Days)

Moderate (90 Days)

Mild (180 Day)

New Castle Co. Apt.; Wilmington, DE X Niagra Falls IAP, NY X Offutt AFB; Omaha, NE X O’Hare IAP; Chicago, IL X Osan AB; S. Korea X Otis ANGB; Falmouth, MA X Patrick AFB; Cocoa Beach, FL X Pease ANGB; Portsmouth, NH X Peterson AFB; Colorado Springs, CO X Pittsburgh IAP, PA X Pope AFB; Fayetteville, NC X Portland IAP, OR X *Prince Sultan AB, Al Kharj, SA X Puerto Rico IAP/Muniz ANGB; San Juan, PR X Quonset St. Apt.; Providence, RI X *RAF Akrotiri, Cyprus X RAF Lakenheath, UK X RAF Mildenhall, UK X RAF Waddington, UK X Ramstein AB, GE X X Randolph AFB; San Antonio, TX X Reno/Tahoe IAP, NV X Rhein-Main, GE X Rickenbacker IAP; Columbus, OH X *Riyadh, SA X Robins AFB; Warner Robins, GA X Rosecrans Mem. Apt.; St. Joseph, MO X Salt Lake City IAP, UT X Schenectady Co. Apt.; NY X Scott AFB; Belleville, IL X Selfridge ANGB; Mount Clemens, MI X Seymour Johnson AFB; Goldsboro, NC X Shaw AFB; Sumter, SC X Sheppard AFB; Wichita Falls, TX X Sioux Gateway Apt.; Sioux City, IA X Souda Bay, Crete X Sky Harbor Apt.; Phoenix, AZ X Spangdalhem AB, GE X Springfield-Bleckley Mun. Apt.; OH X Standiford Fld./Lvle. IAP; Louisville, KY X Suffolk Co. Apt.; NY X *Tabuk, SA X Taegu, S. Korea X *Talil Iraq X Tinker AFB; Oklahoma City, OK X *Thumrait Oman X Toledo Exp. Apt.; Swanton, OH X

Change 14 3-5

* Asterisks before Air base Name and Location designates environments considered as SWA and fall under Chapter 9.

Severe (30 Days)

Moderate (90 Days)

Mild (180 Day)

Travis AFB; Fairfield, CA X Travis Fld.; Savannah, GA X Truax Fld./Dane City Reg. Apt.; Madison, WI X Tucson IAP, AZ X Tulsa IAP, OK X Tyndall AFB; Panama City, FL X USAF Academy, CO X Vance AFB; Enid, OK X Vandenburg AFB; Lompoc, CA X Westover AFB; Chicopee, MA X Whiteman AFB; Knobnoster, MO X Willow Grove ARS; Philadelphia, PA X Will Rogers IAP; Oklahoma City, OK X Wright-Patterson AFB; Dayton, OH X Yokota AB, Japan X Youngstown-Warren Reg. Apt.; ARS, OH X

SECTION II CLEANING

3.2 INTRODUCTION.

• Authorized cleaning agents and equipment are listed in this chapter, Appendix A, and Appen-dix B. Order materials and equipment by NSN from the lists in these appendices through regu-lar supply channels, or local purchase from venders listed on the most current QPL/QPD of a specification or by vender part number listed in these appendices for an authorized non-specification material.

• Specification QPL/QPD’s are the responsibility of the authority for the specification. For infor-mation access, many cleaning and corrosion prevention and control process related specifi-cations having a QPL/QPD are available, with their most current revision, from the AF Portal.

Search “AFCPCO”, or the Defense Technical Information Center (DTIC) Scientific and Tech-nical Information Network web site: http://sti-net.dtic.mil.

• Do not use unauthorized cleaners. Although other commercial cleaners may appear to per-form as well as, or better than, approved prod-ucts, these materials may be corrosive to metal alloys used in aircraft, missiles, and related equipment. They can also accelerate degrada-tion of non-metallic materials causing material failures which may result in fluid leakage, cor-rosion of surrounding metals, electrical shorts, crazing, and/or mechanical failure.

NOTE

Ozone depleting substances (ODS) are solvents such as, but not limited to, 1,1,1 trichloroethane (MIL-T-81533) and trichlorotrifluoroethane (MIL- C-81302). These solvents, as well as products containing them, are still used in some aircraft maintenance processes, including oxygen systems cleaning and some avionics cleaning. Alternate materials continue to be identified. Wherever pos-sible, specifications are being changed to elimi-nate their use automatically. Some products that have been reformulated are now flammable. Pay close attention to all CAUTION/WARNING labels on solvents and solvent-based products.

3.2.1 Reasons for Cleaning. Aircraft cleaning is the first

step in preventing aircraft corrosion. Cleaning requires a knowledge of the materials and methods needed to remove corrosive contaminants and fluids which tend to retain con-taminants. Clean aircraft, missiles, and related equipment regularly in order to:

a. Prevent corrosion by removing salt deposits, other cor-rosive soils, and electrolytes.

3-6 Change 14

b. Maintain visibility through canopies and windows.

c. Allow a thorough inspection for corrosion damage;

aircraft washing before Isochronal (ISO)/Phase inspec-tions is strongly recommended to facilitate corrosion inspections.

d. Maintain turbine engine efficiency.

e. Reduce fire hazards by the removal of accumulations of leaking fluids.

f. Improve overall appearance.

g. Ensure aerodynamic efficiency of the aircraft.

h. Maintain paint scheme characteristics.

3.2.2 When to Accomplish Work. Accomplish cleaning

and related treatments at the frequency prescribed in this Section, or more frequently if inspection indicates the need.

Inspect areas of missiles not protected from the elements (e.g. rain, dust, snow, etc.,) daily. The Aircraft System Pro-gram Director (SPD) in conjunction with the Using Com-mand and the Air Force Corrosion Prevention and Control Office (AFCPCO) shall establish aircraft wash cycle require-ments. The unit Commander shall establish a definite sched-ule for inspection, cleaning, and corrosion treatment of the unit’s assigned aircraft, missiles, and equipment, and may at his/her discretion direct a wash cycle that is more frequent (not less frequent) than the established aircraft wash cycle to ensure optimum corrosion protection and to promote the professional appearance of assigned aircraft, missiles, and equipment.

3.2.2.1 Cleaning Frequency. Base locations not listed in

Table 3-1 will use the requirements of the nearest base loca-tion unless within 1.25 miles of salt water. All locations within 1.25 miles of salt water are considered severe and require 30 day wash. Contact AFCPCO for further guidance if needed. The frequency of inspection, cleaning, and related corrosion treatment depends on the type of systems assigned deployments to corrosive environments well as the existing local environmental and other conditions. Table 3-1 specifies the required aircraft/weapon system wash interval by base or location as dictated by existing, recorded environmental and pollution data at each base and/or location unless a different interval is specified in a system specific technical order. Un-der certain local conditions, depending on aircraft type and usage, the established wash cycle may be insufficient. Some types of aircraft, missiles, and related equipment may re-quire more frequent cleaning of affected areas.

NOTE

When unique operational requirements, contingen-cies, droughts, or facility limitations severely im-pact a unit’s ability to wash as prescribed in Table

3-1. The requirement may be temporarily waived two wash cycles not to exceed one year and ap-proved by the Aircraft System Program Director (SPD). The MAJCOM Corrosion Program Man-ager and AFCPCO shall be notified of all approved waivers to monitor for trends.

a. Excessive exhaust or gun blast soil and exhaust gases accumulate within impingement areas.

b. Paint is peeling, flaking, or softening.

c. Fluid leakage (coolant, hydraulic fluid, oil, etc.,) oc-curs.

d. Exposure to salt spray, salt water, or other corrosive materials occurs.

e. Treated with deicing/anti-icing fluids. Deicing residue should be removed at the first wash following the win-ter season. Refer to Table 3-3 for inspection and clean-ing instructions.

f. Deployments to corrosive environments with no or in-adequate wash capability.

3.2.3 Aircraft Clear Water Rinse (CWR) Require-

ments.

Clear water rinsing shall not be accomplished out-side when the temperature is at 40° F (4° C) or below. Spraying flight control areas outside with water when the temperature is below freezing can result in ice that could impair flight controls.

Aircraft exposed to a salt water environment require clear water rinse (CWR). Specific rinse requirements are as man-dated by aircraft station location, aircraft runway approach, and mission requirements.

3.2.3.1 Aircraft Stationed Within 1.25 Miles of Salt

Water. All aircraft stationed within 1.25 miles (2 km) of salt water require a CWR at least once every 15 days unless washed first.

3.2.3.1.1 Deployed Aircraft to Stations Within 1.25

Miles (2KM) of Salt Water. All aircraft deployed to stations within 1.25 miles (2 km) of salt water for 10 days or more must follow the CWR requirements of the deployment loca-tion. Deployment locations where mission requirements and/or facilities limitations prevent accomplishment of CWR, the aircraft forms will be documented to require a CWR be performed within 3 days of return to home station. Aircraft deployed for 30 days or more to a location where a CWR

Change 15 3-7 cannot be accomplished shall require a complete aircraft washed within 5 days of returning to home station.

NOTE

When extremely unique requirements or facility limitations severely impact a unit’s ability to CWR daily, this requirement may be temporarily waived by the MAJCOM Corrosion Program Manager in conjunction with the Aircraft System Program Di-rector (SPD) who has the final approval authority.

The MAJCOM Corrosion Program Manager must forward a copy of the waiver to the Air Force Cor-rosion Prevention and Control Office (AFCPCO).

3.2.3.2 Low Level (Below 3,000 Feet) Salt Water Run-

way Approach. Aircraft making two or more take-offs and or/landings, including touch-and-go landings, when the run-way approach is under 3,000 feet and over salt water require a CWR after the aircraft completes the last flight of the day.

3.2.3.2.1 Single Take-Off and/or Landing. Any aircraft

(primarily transient aircraft) performing only a single take-off and/or landing requiring low-level flight (below 3,000 feet) over salt water in a single day are excluded from CWR unless there are ten or more occurrences within a 30 day period. After the tenth occurrence, an entry shall be made in the aircraft forms to require a CWR within 5 days after re-turning to home station.

3.2.3.3 Search, Rescue, and Recovery Missions and

Low-Level Flight Operations Under 3,000 Feet. Search, rescue, and recovery missions or any other low-level flight operations that require aircraft to operate over salt water at altitudes under 3,000 feet require a CWR after the aircraft completes the last flight of the day.

NOTE

• Optimum use of taxi-through rinse facilities is recommended for removal of salt contamina-tion.

• CWR does not satisfy aircraft washing require-ments as a CWR only removes readily water-soluble matter from aircraft exterior surfaces.

3.2.4 Immediate Cleaning. These affected areas and soils

must be cleaned immediately.

a. Spilled electrolyte and corrosive deposits found around battery terminals and battery area shall be cleaned, neutralized, and treated. Close attention and regular cleaning is required for battery areas of aircraft, mis-siles, and equipment.

b. Areas of aircraft, missiles, and equipment exposed to corrosive fire extinguishing materials shall be cleaned within 4 hours after application if at all possible. If an aircraft, missile, or piece of equipment is impounded by an Accident Investigation Board, the board shall consider the corrosive effect of fire fighting materials and direct their removal as soon as possible consistent with the accident investigation. Prompt removal of these materials saves considerable labor hours and ma-terials when salvaging and restoring equipment to a serviceable status. (Refer to Chapter 8 for instructions).

c. Salt deposits, relief tube waste, or other contaminants.

d. Aircraft, missiles, or equipment exposed to significant amounts of salt water. If shipped or transported via ship over salt water, they shall be cleaned and given any necessary treatment after receipt, particularly if the preservation and/or packaging are damaged.

e. Fungus growth.

f. Chemical, Biological, and/or Radiological Contami-nated Assets. Any asset that has been contaminated or potentially contaminated must be identified, marked and decontaminated in accordance with AFMAN 10- 2503, Operations in a Chemical, Biological, Radiologi-cal, Nuclear, and High-Yield Explosive (CBRNE) En-vironment and TO 00-110A-1.

g. Spills of corrosive chemicals. An entry in the aircraft AFTO 781A Form shall be made for all corrosive chemical spills and the chemicals shall be neutralized in accordance with procedures in AFMAN 24-204-IP.

3.2.5 Deployed Aircraft Wash Requirements. All air-

craft deployed to a location for more than 20 days shall fol-low the wash intervals from Table 3-1 of the deployed base location. Aircraft deploying from a location with a shorter wash interval than the deployed location must be washed immediately prior to deploying, then will fall into the wash intervals of the deployed location. If an aircraft cannot be washed prior to deploying, the aircraft would remain on it’s home station wash cycle until after the first wash. After the first wash at the deployed location, the aircraft would follow the wash interval of the deployed location.

3-8 Change 15

3.3 CLEANING COMPOUNDS.

Cleaning compounds work by dissolving soluble soils, emul-sifying oily soils, and suspending solid soils. There are sev-eral types of cleaning compounds, each of which cleans a surface using one or more of these mechanisms.

3.3.1 Alkaline Cleaners.

When high strength steels (typically 180 KSI and above), some high strength aluminum, and some stainless steels are exposed to acid paint removers, plating solutions, other acidic materials (cleaners, etc.,) and even some alkaline materials, a cathodic reaction on the metal surface produces hydrogen.

The hydrogen diffuses into the bulk metal, accu-mulating at grain boundaries and weakens the structure. If the part is under load or contains re-sidual manufacturing stresses, sudden catastrophic failure known as hydrogen embrittlement occurs when the part can no longer sustain the internal and/or applied stresses. Hydrogen embrittlement has been known to occur in parts stressed to only 15% of the nominal tensile strength of the metal.

Many alkaline cleaners are not authorized for cleaning of Air Force aircraft, missiles, and related equipment because they are incompatible with the polyimide insulation on the elec-trical wiring used on many aircraft, missiles, and related equipment. Cleaning compounds conforming to MIL-PRF- 87937 and MIL-PRF-85570 and that are listed on the QPL/ QPD for each specification have been tested and proven compatible with polyimide insulation. Types I and IV of MIL-PRF-87937 and Types I and II of MIL-PRF-85570 all contain detergents and foaming agents and work the same way as any detergent solution. Type I cleaners of both speci-fications contain solvents and are more effective for removal of heavy oils and greases such as wire rope lubricant, but they cannot be used in poorly ventilated areas due to their solvent content. Type IV of MIL-PRF-87937 and Type II of MIL-PRF-85570 are all good general cleaners for removal of dirt, grime, light oils, and hydraulic fluid, and they are usable in confined areas such as cockpits, cabins, bilges, and equipment bays as they contain no solvents.

3.3.1.1 MIL-PRF-87937, Type I and MIL-PRF-85570, Type I. MIL-PRF-87937, Type I (terpene solvent based) and MIL-PRF-85570, Type I (aromatic solvent based) cleaners are water dilutable and biodegradable materials and are very good general cleaners for washing aircraft, missiles, compo-nents, and support equipment. However, since they contain solvents, environmental and waste disposal factors need to be considered prior to use. Since MIL-PRF-87937, Type I materials contain terpenes which are potentially corrosive if entrapped and not completely removed, their use may be restricted on some weapon systems in specific applications.

Always consult weapon system specific -23 TO’s for precau-tions and/or restrictions on use of this class of materials.

These cleaners may be used as alternates for MIL-PRF- 87937, Type IV and MIL-PRF-85570, Type II materials.

MIL-PRF-87937, Type I cleaners are approved for use on support equipment (SE) per TO 35-1-3 and aircraft wheels per TO 4W-1-61.

3.3.1.2 MIL-PRF-87937, Type IV and MIL-PRF-85570, Type II. MIL-PRF-87937, Type IV and MIL-PRF-85570, Type II cleaners are water dilutable and biodegradable mate-rials and are the primary cleaners for washing the exterior of aircraft, missiles, engines, and support equipment (SE). They are excellent materials for removing light to medium soils (greases, oils, grime, etc.,) from almost all surfaces. Since they contain no solvents, their use is not limited, except that approval by the aircraft SPD is required prior to use on transparent plastic aircraft canopies, windows, and wind-shields/windscreens. Depending on the type of soils involved, these cleaners may be used in various dilutions as substitutes for solvents in hand wipe cleaning of greasy and oily areas.

Apply them from a pump spray bottle followed by drying with a clean, lint free cloth. When applied from a pump spray bottle at the most dilute mixture recommended, these are excellent cleaners for lightly soiled surfaces in aircraft cabins and cockpits such as non-transparent plastic parts and instrument glass covers.

3.3.1.3 MIL-PRF-87937, Type III and MIL-PRF-85570, Type V. MIL-PRF-87937, Type III and MIL-PRF-85570, Type V are gel type cleaners intended for full strength appli-cation with no dilution in areas requiring special cleaning, such as aircraft wheel wells, control surface wells, and wing butts. They contain small amounts of solvents, detergents, and thickening agents, which make them cling very well to vertical and overhead surfaces. These cleaners are very ef-fective in emulsifying and/or cleaning heavy deposits of hy-draulic fluids, oils, greases, and carbon. In areas where com-plete rinsing with water can be tolerated, they may be used as direct replacements for solvent cleaners such as MIL-PRF- 680, MIL-PRF-32295, Type II, and A-A-59601. To be most effective, these materials are applied full strength with no pre-rinsing of the surface, allowed to dwell 5 to 15 minutes, agitated with a non-metallic bristle brush, and then rinsed thoroughly with tap water. These cleaners are not intended for and shall not be used on transparent plastic aircraft cano-pies, windows, and windshields/windscreens.

3.3.1.4 MIL-PRF-87937, Type IV. MIL-PRF-87937, Type IV is also an excellent heavy duty, water dilutable, solventless cleaner intended for removal of light to heavy deposits of greases, oils, hydraulic fluids, and carbon from aircraft, missile, and other equipment surfaces. It is not in-tended for and shall not be used on transparent plastic air-craft canopies and windows.

3.3.1.5 MIL-PRF-85570, Type IV. MIL-PRF-85570, Type IV is a cleaner that contains solvents, detergents, and suspended rubber particles and is intended for removal of exhaust gas and gun gas residues, smudges, boot marks, and other embedded soils from aircraft, missiles, and other equip-

Change 5 3-9 ment with flat (low gloss)/camouflage coating systems. When rubbed across a soiled surface, the rubber particles in the cleaner mechanically entrap the soils like tiny erasers with-out polishing the surface of the coating system and increas-ing its gloss.

NOTE

Solvents used in MIL-PRF-85570, Type IV clean-ers may be hazardous air pollutants (HAP’s). Con-sult with Bioenvironmental Engineering before us-ing this cleaner. MIL-PRF-87937, Types III and IV or MIL-PRF-85570, Type V may be used as alternates.

3.3.1.6 MIL-PRF-85570, Type III.MIL-PRF-85570, Type

III is a cleaner that contains detergents and fine abrasive particles and is intended for removal of exhaust gas and gun blast residues from aircraft with a high gloss coating system.

When rubbed across a soiled surface, the abrasive particles mechanically remove the soils which are then suspended in the detergent while producing only a very minimal dulling of the high gloss coating system.

3.3.2 Solvent Emulsion and Aqueous Cleaners for Tur-

bine Engine Gas Path and General Area Cleaning.MIL- PRF-85704, Types I, II, and III materials are solvent emul-sion (Types I and II) and aqueous (Type III) cleaners intended for cleaning the internal areas or gas path of aircraft turbine engines. A-A-59921 (formerly MIL-C-43616), Class 1A ma-terials are solvent emulsion cleaners intended for general cleaning of heavily soiled exterior areas of aircraft, missiles, and other equipment. Use only those materials listed on the QPL/QPD’s for MIL-PRF-85704 and A-A-59921 (formerly

MIL-C-43616).

3.3.2.1 MIL-PRF-85704, Type I. MIL-PRF-85704, Type

I (solvent emulsion with aromatic hydrocarbons) and Type II (aqueous with some non-aromatic hydrocarbons) are materi-als intended for cleaning the interior of an aircraft engine by spraying the cleaner into the intake while the starter is mo-toring the engine. There is a Type II, RTU (ready-to-use) material that requires no dilution before use, but the bulk form of Type II and Type I must be diluted with water hav-ing a maximum conductivity of 10 micro-mho/centimeter and a pH in the 5.0 to 8.0 range before use. Type III (bulk, same water dilution requirements) and Type III RTU (ready-to-use with no dilution) are aqueous materials with no hy-drocarbon solvents intended for cleaning the interior of an aircraft engine by spraying the cleaner into the intake while the engine is on line or running per specific engine mainte-nance instructions. These cleaners work very well for re-moval of accumulated salts, dirt, and oily soils from the compressor section and other areas of the gas path of aircraft engines, and their use is followed by spraying fresh tap wa-ter through the engine to rinse away the contaminants.

3.3.2.2 A-A-59921, (Formerly MIL-C-43616), Class

1A. A-A-59921 (formerly MIL-C-43616), Class 1A aerosol material is a solvent emulsion cleaner and is very effective for removal of oily and greasy soils from general exterior painted (polyurethane only) and unpainted areas of aircraft, missiles, and other equipment.

NOTE

• MIL-PRF-85704 materials are specially formu-lated to minimize corrosion of aircraft turbine engines. Other types of cleaners shall not be used to clean engine interior areas without spe-cific approval by the engine SPM and/or as re-quired by the system specific engine mainte-nance TO. The system specific engine maintenance TO shall be consulted for interior cleaning procedures and the requirement/autho-rization to use MIL-PRF-85704 cleaners.

• A-A-59921 (formerly MIL-C-43616) solvent emulsion cleaners shall not be used on non-polyurethane paint systems and markings as their high solvent content can cause them to fade and/or streak. These cleaners also leave a very thin oil and/or solvent film on the surface, so they are not suitable for use as a final cleaner prior to painting, sealing, or adhesive bonding.

• Large scale use of bulk solvent emulsion clean-ers may cause problems for waste water treat-ment facilities. Local air pollution regulations may restrict the amount and application meth-ods of solvent emulsion cleaners. If so, use MIL-PRF-85704, Type II, RTU in lieu of the Type I and the appropriate type of MIL-PRF- 87937 or MIL-PRF-85570 in lieu of A-A-59921 (formerly MIL-C-43616), Class 1A.

3.3.3 Aqueous Parts Washer Cleaning Solutions. Ma-

terials conforming to and listed on the QPL/QPD for MIL- PRF-29602, Type I (liquid concentrate) and Type II (pow-der) Cleaning Compounds for Parts Washers and Spray Cabinets, either diluted with water (Type I) or dissolved in water (Type II) in accordance with manufacturer’s instruc-tions are the cleaning agents to be used in high pressure cabinet style parts washers for removing oils and greases from disassembled components. They are not to be used for bearings unless authorized by system specific technical data.

Due to their maximum allowable pH of 13.5, MIL-PRF- 29602 cleaning solutions can attack/corrode aluminum al-loys. Aircraft SPD and/or equipment SPM engineering au-thority approval is required before cleaning aluminum alloy parts. In addition, many heated MIL-PRF-29602 solutions can attack the IVD (Ion Vapor Deposited) aluminum coating used on many high strength steel components and generate hydrogen, which can enter into the steel and cause a cata-strophic failure by hydrogen embrittlement. This is of par-ticular concern for IVD aluminum coated high strength steel aircraft landing gear (LG) components. These LG compo-nents shall be cleaned in aqueous parts washers using only those materials listed on the most current revision of the applicable landing gear technical orders.

3-10 Change 5

3.3.4 Solvents. Cleaning solvents dissolve oily and greasy

soils so that they can be easily wiped away or absorbed on a cloth. However, solvents differ significantly in their cleaning ability, toxicity, evaporation rate, effect on paint, and flam-mability. A-A-59601, and/or MIL-PRF-680, are the most common cleaning solvents used on aircraft due to their low toxicity, minimal effect on paint, and relative safety. MIL- PRF-32295, Type II cleaning solvents provides the cleaning performance of MIL-PRF-680 and also with low toxicity, minimal effect on paint, and relative safety. Other solvents such as alcohols, ketones, chlorinated solvents, and naphtha, are specialized materials restricted for use as recommended in Table 3-2.

NOTE

• Solvent cleaning operations are becoming more and more limited due to environmental regula-tions. Determine local requirements regarding limitations on type and volume used and dis-posal from your work center supervisor, safety officer, and/or Bioenvironmental Engineer.

• MIL-PRF-32295 was developed as a low-VOC and HAP-free replacement for P-D-680, A-A- 59601, and MIL-PRF-680.

• A-A-59601 Dry Cleaning and Degreasing Sol-vent P-D-680 and MIL-PRF-680 Degreasing Solvent, replace P-D-680 Dry Cleaning and Degreasing Solvent. MIL-PRF-680 has been reformulated to reduce Hazardous Air Pollut-ants by reducing the aromatic content of the solvent, while A-A-59601 is identical to P-D- 680.

3.3.4.1 MIL-PRF-680 Degreasing Solvent and A-A-

59601 Dry Cleaning and Degreasing Solvent, P-D-680.

These solvents are used as cleaners and degreasers for painted and unpainted metal parts and to remove corrosion preven-tive compounds. The solvents are available in several types.

Although the degreasing effectiveness is approximately the same, the flash points differ as follows: Type I, both specifi-cations, 100° F (38° C) minimum; Type II, both specifica-tions, 140° F (60° C) minimum; Type III, both specifica-tions, 200° F (93° C) minimum, Type IV (D-limonene additive), and MIL-PRF-680 only, 140° F (60° C) minimum.

Though the flash points differ, all types will burn intensely once ignited. Type I, both specifications, is not authorized as a general cleaner due to its flammability, but may be used in parts washers designed for such solvents. Type II, both specifications, is the most common cleaning solvent used on aircraft, missiles, and equipment because of its higher flash point. If necessary, ASTM D 235, Type II, Class C, Mineral Spirits may be used as a substitute for MIL-PRF-680 or A-A-59601, Type II. Type III, both specifications, is intended for use in confined spaces and in locations with environmen-tal constraints where a solvent with a very low vapor pres-sure (evaporation rate) and a very high flash point is re-quired. MIL-PRF-680, Type IV (D-limonene additive), may be used where a higher flash point and strong solvency is desired if approved by the aircraft SPD or the missile or equipment SPM. The dwell time for all types should be held to a minimum (less than 15 minutes), to avoid damage to paint.

3.3.4.1.1 MIL-PRF-32295, Type II. These solvents are

used as cleaners and degreasers for painted and unpainted metal parts and to remove corrosion preventive compounds.

NAVSOLVE® is currently the only solvent meeting the MIL-PRF-32295 specification. NAVSOLVE® is a combus-tible solvent with a flash point of 142 °F (61.1 °C). NAV- SOLVE® has a solvent vapor pressure of 2.8 mm Hg (Con-forms to Type I limit of <7mm Hg @ 20 °C, and Type II limit of < 45 mm Hg @ 20 °C).

3.3.4.2 TT-I-735 Isopropyl Alcohol. Isopropyl alcohol is

a flammable solvent used primarily as a disinfectant for cleaning fungus and mold. It is a poor degreaser.

3.3.4.3 ASTM D 740 Methyl Ethyl Ketone (MEK). This

is a highly flammable solvent used primarily for cleaning prior to painting and bonding. It may also be used for clean-ing if surfaces become contaminated with leaking oils and/or hydraulic fluids after surface treatment. Most locations can-not use MEK due to environmental restrictions on use of solvents with vapor pressures greater than 44 millimeters of mercury (mm Hg). MIL-PRF-87937, Type IV or MIL-PRF- 85570, Type II (either-diluted one part cleaner to nine parts water), may be used as an alternate followed by rinsing thor-oughly with fresh water and air drying or surfaces may be cleaned by solvent wiping with SAE AMS 3166, solvents, cleaning, Cleaning Prior to Application of Sealing Com-pounds.

3.3.4.4 Aliphatic Naphtha. Aliphatic naphtha is a highly

flammable solvent used primarily for cleaning oily or greasy deposits from acrylic canopy materials. Other solvents cause crazing of acrylics. It can also be used to remove masking or preservation tape residue.

3.3.4.5 MIL-T-81772, Type I (Polyurethane) and Type

II (Epoxy) Thinner. Both of these thinners are highly flam-mable solvents that can be used for prepaint solvent cleaning when necessary at locations requiring a solvent vapor pres-sure less than 45 mm Hg.

3.3.5 Miscellaneous Cleaning Agents. Some other

cleaning materials used on aircraft, missiles, and equipment are listed here. P-P-560 plastic polish containing a mild abrasive is used to polish out scratches in acrylic canopy and window materials. Some alkaline chemicals used to neutral-ize specific acidic soils are: A-A-59370 ammonium hydrox-ide for urine and ASTM D 928 sodium bicarbonate for elec-trolyte spills from sulfuric acid batteries. Some acidic chemicals used to neutralize specific alkaline soils are: ANSI/ AWWA B504 monobasic sodium phosphate and A-A-59282 boric acid for electrolyte spills from nickel-cadmium batter-ies. MIL-F-24385 AFFF fire extinguishing agent containing wetting and foaming agents can be used to wash out residues from fire extinguishing solutions made with salt water. A-A-

Change 5 3-11

59199 optical glass lens cleaner is used for cleaning optical lenses on aircraft, missiles, and equipment. Solutions of O-D-1435 and A-A-1439 disinfectants are used to sanitize and deodorize relief tube areas; latrine areas including toilet bowls, urinals, and latrine buckets, garbage receptacles, sinks, galley areas, and other interior areas of aircraft and equipment requiring disinfection.

3.3.5.1 General Disinfectants. Calla® 1452 is a concen-

trated disinfectant and Isopropyl Alcohol (70% concentra-tion) is utilized as a disinfecting solution. Both materials can be used as general cleaners for aircraft and equipment inte-rior surfaces requiring disinfection. All materials listed in this paragraph are to be mixed and/or applied per manufac-turer’s instructions unless otherwise specified by the cogni-zant engineering authority and/or System Program Offices

(SPO).

3.3.6 Steam Cleaning. Steam cleaning shall not be used

on aircraft and missiles at all levels (Organizational/Unit, Intermediate, or Depot) of maintenance. In addition, steam cleaning shall not be used on the following items on equip-ment and components removed from aircraft and missiles:

honeycomb bonded structure, sealant, fiberglass composites, acrylic windows and canopies, or electrical wiring. Steam cleaning erodes paint, crazes plastics, disbonds adhesives, damages electrical insulation, and drives lubrication out of bearings.

3.3.7 Dilution.More concentrated solutions than those rec-

ommended do not clean any better and are wasteful; MORE IS NOT ALWAYS BETTER. In fact, if too much cleaner is used, the solution merely becomes slippery film, preventing the washing pad from loosening the soil and making rinsing more difficult. Do not exceed the cleaner dilution ratios rec-ommended in Table 3-2.

Table 3-2. Cleaning of Specific Areas and Components

Area or Component Type of Soil Cleaning Agent or Compound

Mixing Directions and Nomenclature

Cleaning Procedures

NOTE

• Cleaning procedures are listed in this table. Ordering information for approved materials can be found in Ap-pendix A. Ordering information for approved equipment can be found in Appendix B.

• Use of hot water (120° to 140° F/49° to 60° C) for rinsing during aircraft washing operations is strongly rec-ommended as it provides much more efficient rinsing and is known to reduce man-hours for aircraft washing operations by approximately 20%.

• A-A-59601 dry cleaning and degreasing solvent, P-D-680, MIL-PRF-32295 and MIL-PRF-680 degreasing sol-vent are combustible. Keep away from open flames. Use in a well ventilated area. Wear rubber gloves and chemical or splash proof goggles. Avoid skin contact. Consult the local safety office regarding respiratory protection.

• Wear rubber gloves, chemical or splash proof goggles, and water resistant boots during cleaning operations using MIL-PRF-87937 and MIL-PRF-85570 cleaning compounds. If cleaner is splashed in eyes, rinse thor-oughly with fresh water for 15 minutes and report to medical facility. Remove clothing saturated with cleaning solution immediately and flush exposed skin areas with fresh water.

3-12 Change 19

Table 3-2. Cleaning of Specific Areas and Components - Continued

Area or Component Type of Soil Cleaning Agent or Compound

Mixing Directions and Nomenclature

Cleaning Procedures

EXTERIOR SUR-

FACES, PAINTED

Light Soils (dirt, dust, mud, salt, loose soot)

MIL-PRF-87937,

Type IV or MIL- PRF-85570, Type II or

1 part cleaner in 9 parts water

Apply cleaner solution with foam generator, spray, sponge, soft brush, or cloth. Scrub and then rinse with fresh water and dry. MIL-PRF-87937, Type I materials contain ter-penes. Aircraft SPD and/or missile or equipment SPM restrictions may apply. Con-sult system specific mainte-nance manuals.

MIL-PRF-87937 or

MIL-PRF-85570,

Type I

1 part cleaner in 16 parts water

Change 19 3-12.1/(3-12.2 blank)

Compound

Mixing Directions and Nomenclature

Cleaning Procedures

Moderate Soils (hydraulic flu-ids, lube soils, light preserva-tives) Heavy Soils (carbon-ized oil, aged preservatives, grease, gun blast, and ex-haust deposits)

MIL-PRF-87937,

Type IV or MIL- PRF-85570, Type II or

1 part cleaner in 4 parts water

Apply cleaner solution with foam generator spray, sponge, soft brush, or cloth.

Rub gently with a circular motion for up to 1 minute.

Rinse with fresh water and dry. Use of MIL-PRF- 87937, Type I is subject to restrictions noted above.

MIL-PRF-87937 or

MIL-PRF-85570,

Type I

1 part cleaner in 9 parts water

MIL-PRF-87937,

Type III or MIL- PRF-85570, Type V or

Undiluted Spray or brush on cleaner.

After 5 to 15 minutes, brush and rinse thoroughly.

A-A-59601 or MIL-

PRF-680

Degreasing Solvent Undiluted

Pre-clean by wiping or brush-ing with A-A-59601, MIL- PRF-32295, Type II or MIL-PRF-680, Type II or III solvent, then apply cleaner solution with foam generator, spray, sponge, or cloth. Allow the cleaner to dwell for up to 1 minute without scrubbing, then scrub for up to a minute.

Rinse thoroughly, then dry.

Do not allow cleaning solu-tion to dry on surfaces or streaking will occur. Use of MIL-PRF-87937, Type I is subject to restrictions noted above in Exterior Painted Surfaces.

CCC-C-440, Type II or III, Class 1 or A-A-2522, Grade A or SAE AMS 3819, Class 1, Grade A and

Cotton Cheesecloth (Unbleached) White Cotton Cloth White Cleaning Cloth

MIL-PRF-87937 or

MIL-PRF-85570,

Type I or

1 part cleaner in 4 parts water

MIL-PRF-87937,

Type IV or MIL- PRF-85570, Type

II

1 part cleaner in 4 parts water

Stubborn Soil on Gloss Painted Aircraft (scuff marks, ex-haust, etc.)

MIL-PRF-87937,

Type IV

1 part cleaner in 4 parts water

Apply cleaner with a damp cloth. Rub with a circular motion. Rinse thoroughly, then dry. Do not allow the cleaner to dry on surfaces or rinsing may be difficult.

MIL-PRF-85570,

Type III, IV, or V

Undiluted

Stubborn Soil on Low Gloss/Flat and/or Camou-flage Paint Scheme Air-craft (scuff marks, ex-haust, etc.)

MIL-PRF-85570,

Type IV

Undiluted Apply cleaner with a non-abrasive cleaning pad. Al-low 1 to 3 minutes dwell time. Rub with a circular motion. Rinse thoroughly, then dry. Do not allow the cleaner to dry on surfaces or rinsing may be difficult.

Change 5 3-13

Compound

Mixing Directions and Nomenclature

Cleaning Procedures

Wear rubber gloves, chemical or splash proof goggles, and water resistant boots during cleaning operations using MIL-PRF-87937 or MIL-PRF-85570 cleaning compounds. If cleaner is splashed in eyes, rinse thoroughly with fresh water for 15 minutes and report to medical facility. Remove clothing saturated with cleaning solution imme-diately and flush exposed skin with fresh water.

Do not allow MIL-PRF-87937 or MIL-PRF-85570, Type I cleaning solutions to contact canopy, window, or wind-shield/windscreen transparent plastic panels as they may cause crazing.

EXTERIOR SUR-

FACES, UN-

PAINTED

Gunblast resi-dues, carbon-ized exhaust residues

MIL-PRF-87937 or

MIL-PRF-85570,

Type I or

1 part cleaner in 4 parts water

Wet surface with fresh water.

Apply cleaning solution and scrub briskly with A-A- 58054, Type I, Grade A or B abrasive mat. Rinse with fresh water and dry. Use of MIL-PRF-87937, Type I is subject to restrictions noted above in Exterior Painted Surfaces.

MIL-PRF-87937,

Type III or MIL- PRF-85570, Type IV or V

Undiluted

• Wear rubber gloves, chemical or splash proof goggles, and water resistant boots during cleaning operations using MIL-PRF-87937 or MIL-PRF-85570 cleaning compounds. If cleaner is splashed in eyes, rinse thor-oughly with fresh water for 15 minutes and report to medical facility. Remove clothing saturated with cleaning solution immediately and flush exposed skin with fresh water.

• When using Ammonium Hydroxide (Ammonia), do not breathe vapors and avoid skin contact. Wash immedi-ately, if spilled on skin.

• When using Ammonium Hydroxide (Ammonia), do not allow any solutions to contact aircraft wiring. Flush immediately with fresh water if spillage occurs.

• Avoid use of compressed air to clean electronic equipment. Do not use abrasives in radome compartments.

INTERIOR AREAS

Lavatories

Urine residue A-A-59370 Ammonium Hy-droxide (Ammo-nia) 1 part in 20 parts water

Sponge with a solution of ammonium hydroxide (am-monia). Flush with fresh water or wet surface with sodium bicarbonate solu-tion, allow to dry, and rinse with fresh water. Dry with a clean cloth.

ASTM D 928 Sodium Bicarbon-ate, 6 OZ to 1 GL of fresh wa-ter

3-14

Compound

Mixing Directions and Nomenclature

Cleaning Procedures

USDA Reg 100-12-1 Germicidal Tablets Use germicidal tables as toilet and urinal deodorants.

All types of soils on lavatory surfaces

O-D-1435, A-A- 1439, or AMS

Mix per manufac-turer’s instruc-tions

Pour solution into toilets, uri-nals, and latrine buckets.

Scrub with a brush and rinse with fresh water.

Sponge all other surfaces with the solution, sponge area with fresh water, and wipe dry.

Floor and Deck Dirt, debris MIL-PRF-87937, Type IV or MIL- PRF-85570, Type II (Preferred) or

1 part cleaner in 9 parts water

Remove loose dirt with vacuum cleaner. Wipe with cleaning compound and rinse with fresh water. Use of MIL-PRF-87937, Type I is subject to restrictions noted above in Exterior Painted Surfaces.

MIL-PRF-87937, or

MIL-PRF-85570,

Type I (Alternate)

1 part cleaner in 16 parts water

Radome and Equip-ment Compart-ment (Interior)

Dust, dirt, oil, and debris

MIL-PRF-87937,

Type IV or MIL- PRF-85570, Type II and

1 part cleaner in 16 parts water

Remove loose dirt with a vacuum cleaner. Wipe fiber-glass and other surfaces with a cloth wet with clean-ing solution and rinse with cloth wet with fresh water.

Dry with a clean cloth.

CCC-C-440, Type I or II, Class 1 or A-A-59323, Type II or SAE AMS 3819, Class 1, Grade A or B

Cotton Cheesecloth (Unbleached) Cleaning Cloth, Low lint White Cleaning Cloth

Cockpit Interior Dust, dirt, mud, and light de-bris

MIL-PRF-87937,

Type IV or MIL- PRF-85570, Type II and

1 part cleaner in 9 parts water

Loosen any accumulations of mud on control pedals, floors, or other cockpit equipment with brush and remove with vacuum cleaner. Wipe with cloth wet with cleaning solution and follow with a cloth wet with fresh water. Dry with a clean cloth.

A-A-50129 Cloth, Flannel

Environmental Con-trol Ducting

Light debris, dust, and grime

MIL-PRF-87937,

Type IV or MIL- PRF-85570, Type

II

1 part cleaner in 9 parts water

Refer to applicable mainte-nance manuals.

NOTE

Refer to aircraft system specific manual to determine acrylic plastic parts.

ACRYLIC PLAS-

TIC PARTS (EX-

CEPT CANO-

PIES AND

WINDOWS)

Light soil and smudges

MIL-PRF-87937,

Type IV or MIL- PRF-85570, Type II and

1 part cleaner in 16 parts water

Wipe with cloth wet with cleaning solution and follow with a cloth wet with fresh water. Dry with a clean cloth.A-A-50129 Cloth, Flannel

Change 1 3-15

Compound

Mixing Directions and Nomenclature

Cleaning Procedures

INTERIOR PLAS-

TIC AND

GLASS PANELS

A-A-50129 Cloth, Flannel Vacuum and then dust with soft, clean, damp cloth.

Keep cloth free of grit by rinsing frequently in water and wringing out.

ELASTOMERIC

SEALS

Dust, dirt, oil, and grime

MIL-PRF-87937,

Type IV or MIL- PRF-85570, Type

II

1 part cleaner in 9 parts water

Wipe with cloth wet with cleaning solution and rinse with a cloth wet with fresh water. Dry with a clean cloth.CCC-C-440, Type I or II, Class 1 or Cotton Cheesecloth (Unbleached)

Cleaning Cloth (Low lint) White

A-A-59323, Type II or SAE AMS 3819, Class 1, Grade A or B

Cleaning Cloth

Wear rubber gloves, chemical or splash proof goggles, and water resistant boots during cleaning operations using MIL-PRF-87937 and MIL-PRF-85570 cleaning compounds. If cleaner is splashed in eyes, rinse thoroughly with fresh water for 15 minutes and report to medical facility. Remove clothing saturated with cleaning solution imme-diately and flush exposed skin with fresh water.

FABRIC PARTS,

SOUND-PROOF-

ING AND UP-

HOLSTERY

Light soil and oil spots

MIL-PRF-87937,

Type IV or MIL- PRF-85570, Type

II

1 part cleaner in 4 parts water

Remove loose dirt with vacuum cleaner. Apply soap solution with sponge and scrub briskly. Rinse with clean, dampened rag or sponge using clean, fresh water.