PurchaseDescription.pdf

20 November 2008

AMSC N/A FSC 1730

Distribution Statement A. Approved for public release; distribution is unlimited.

PD08WRGBGBEA24

CAGE 98752

PURCHASE DESCRIPTION

B-52 DRAG CHUTE MAINTENANCE STAND

1. SCOPE

1.1 Scope. This Purchase Description (PD) covers the requirements for the B-52 Drag Chute Maintenance Stands (hereafter called the B-52 Drag Chute Stand, B-52 Stand(s) or Stands). The B-52 Drag Chute Stand allows maintenance personnel use of multiple levels to perform maintenance on the B-52 aircraft and to install / service the drag chute. The B-52 Stands are relatively simple structures consisting of a frame assembly, main stairway, two working platforms, and a hoist assembly. The entire structure is mounted on casters with pneumatic tires and capable of being disassembled and transported by military aircraft to various locations worldwide.

2. APPLICABLE DOCUMENTS

2.1 General. The documents listed in this section are specified in sections 3, 4, or 5 of this specification. This section does not include documents cited in other sections of this specification or recommended for additional information or as examples. While every effort has been made to ensure the completeness of this list, document users are cautioned that they must meet all specified requirements of documents cited in sections 3, 4, or 5 of this specification, whether or not they are listed.

2.2 Government documents.

2.2.1 Specifications, standards, and handbooks. The following specifications, standards, and handbooks of the exact revision listed below form a part of this specification to the extent specified herein.

FEDERAL STANDARDS

FED-STD-595C/26173 Ocean Gray, NAVSEA

DEPARTMENT OF DEFENSE SPECIFICATIONS

MIL-DTL-5541F Chemical Conversion Coatings on Aluminum and

INCH POUND

Aluminum Alloys MIL-PRF-23377J(2) Primer Coatings: Epoxy, High-Solids MIL-PRF-26915D(2) Primer Coating, for Steel Surfaces MIL-DTL-0053030B Primer Coating, Epoxy, Water Reducible, Lead and

Chromate Free MIL-PRF-83282D(1) Hydraulic Fluid, Fire Resistant, Synthetic Hydrocarbon

Base, Metric, NATO Code Number H-537 MIL-PRF-85285D(2) Coating: Polyurethane, Aircraft and Support Equipment

DEPARTMENT OF DEFENSE STANDARDS

MIL-STD-130N Identification Marking of U.S. Military Property MIL-STD-209K Lifting and Tiedown Provisions MIL-STD-810F(3) Environmental Engineering Considerations and

Laboratory Tests MIL-STD-882D Standard Practice for System Safety MIL-STD-889B(3) Dissimilar Metals

DEPARTMENT OF DEFENSE HANDBOOKS

MIL-HDBK-1791(2) Designing for Internal Aerial Delivery in Fixed Wing Aircraft

MIL-HDBK-1791 C-17

Appendix

Designing for Internal Aerial Delivery in Fixed Wing Aircraft C-17 Appendix

(Copies of these documents, except for MIL-HDBK-1791 C-17 Appendix, are available online at http://assist.daps.dla.mil/quicksearch/ or from the Standardization Document Order Desk, 700 Robbins Avenue, Building 4D, Philadelphia, PA 19111-5094. A copy of MIL-HDBK-1791 C-17 Appendix can be obtained from the Procuring Contracting Officer (PCO) or requested by contacting Air Transportability Test Loading Agency (ATTLA) at 937-255-6296.)

2.2.1 Other Government documents.

AIR FORCE OCCUPATIONAL SAFETY & HEALTH

AFOSH STD 48-8 Controlling Exposures to Hazardous Materials AFOSH STD 91-501 Air Force Consolidated Occupational Safety Standard

(Electronically available at:

www.e-publishing.af.mil/pubfiles/af/48/afoshstd48-8/afoshstd48-8.pdf and www.e-publishing.af.mil/pubfiles/af/91/afoshstd91-501/afoshstd91-501.pdf )

OCCUPATIONAL, SAFETY, AND HEALTH STANDARDS

OSHA 1910.29 Manually Propelled Mobile Ladder Stands and Scaffolds (Towers)

(Electronically available at:

http://www.osha.gov/pls/oshaweb/owastand.display_standard_group?p_toc_level=1&p_part_nu mber=1910)

2.3 Non-Government publications. The following documents of the exact revision listed below form a part of this document to the extent specified herein.

AMERICAN SOCIETY OF MECHANICAL ENGINEERS (ASME)

B30.2-2005 Overhead and Gantry Cranes (Top Running Bridge, Single or Multiple Girder,Top Running Trolley Hoist)

(Application for copies should be addressed to The American Society of Mechanical Engineers Three Park Avenue, New York, NY 10016-5990.)

AMERICAN WELDING SOCIETY (AWS)

D1.1/D1.1M:2006 Structural Welding Code–Steel–20th Edition D1.2/D1.2M:2003 Structural Welding Code–Aluminum–Fourth Edition

(Application for copies should be addressed to American Welding Society, 550 N.W. LeJeune Road, Miami FL 33126.)

SOCIETY OF AUTOMOTIVE ENGINEERS (SAE)

ARP1247C General Requirements for Aerospace Ground Support Equipment, Motorized and Nonmotorized

(Application for copies should be addressed to SAE, Inc., 400 Commonwealth Drive, Warrendale, PA 15096.)

2.4 Order of precedence. Unless otherwise noted herein or in the contract, in the event of a conflict between the text of this document and the references cited herein (except for related specification sheets), the text of this document takes precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained.

3. REQUIREMENTS

3.1 Preproduction. One (1) preproduction B-52 Drag Chute Stand shall be subjected to preproduction inspection in accordance with 4.2.

3.2 B-52 Drag Chute description. The B-52 Stands consist of a frame, caster mounted pneumatic tires with locking brakes, main stairway, two working platforms, and a hoist. The stand shall be towable and capable of being disassembled for air transport to military locations worldwide. The

B-52 Stands shall, as a minimum, be in accordance with the requirements of this specification.

3.3 Design and construction. The B-52 Drag Chute Stand shall be designed and constructed so that no parts will work loose in service. They shall be built to withstand the strains, jars, vibrations, and other conditions incident to shipping, storage, installation, and service. They shall be weatherproof and designed to prevent the intrusion of water and sand into critical operating components.

3.3.1 Materials, protective coatings, and finish.

3.3.1.1 Recycled, recovered, or environmentally preferable materials. Recycled, recovered, or environmentally preferable materials shall be used to the maximum extent possible provided that the material meets or exceeds the operational and maintenance requirements, and promotes economically advantageous life cycle costs. However, used, rebuilt, or refurbished items shall not be provided.

3.3.1.2 Protective coatings. Materials that deteriorate when exposed to sunlight, weather, or operational conditions normally encountered during the service life of the item shall not be used or shall have means of protection against such deterioration that does not prevent compliance with the performance requirements specified herein. Protective coatings that chip, crack, or scale with age or extremes of climatic conditions or when exposed to heat shall not be used.

Fasteners, handles, and fittings used in the assembly of the item shall also be primed and painted.

Surface preparation and pretreatment shall be in accordance with the respective primer and topcoat specifications. Structures shall be cleaned and degreased and scuffed or blasted prior to priming; primer shall be applied before any oxidation or rusting occurs. Ferrous structures and surfaces shall be primed with a water reducible zinc rich primer in accordance with MIL-PRF-26915, Type II, Class B; this shall be followed, within four hours, by a coat of MIL-DTL-0053030 intermediate primer in a wet-to-wet primer application. This two part primer system shall yield a dry-film thickness of 2.0-2.5 mils for the zinc primer and 0.9 to 1.1 mils for the intermediate primer. The two-primer system shall be allowed to dry and fully cure in accordance with the primer manufacturer's directions prior to top coating. Aluminum surfaces shall have MIL-DTL-5541, Type I, Class 1A, chromate conversion coating applied in accordance with the manufacturer’s directions prior to priming. Aluminum and mixed aluminum and ferrous structures and surfaces shall be primed with strontium chromate based corrosion inhibitor, Type I, Class C2 of MIL-PRF-23377. This single part primer system shall yield a dry-film thickness of 0.6 to 0.8 mils. Raw metal edges, to include fastener and drain holes, shall be coated with primer before applying topcoat. Topcoat shall be polyurethane in accordance with Type I, Class H of MIL-PRF-85285. Neither Chemical Agent Resistant Coating (CARC) nor powder coating shall be used. Topcoat shall be applied to a dry film thickness of 1.6 to 2.4 mils in all instances, regardless of the primer system utilized. The coating shall be free from runs, sags, orange peel, or other defects.

3.3.1.3 Dissimilar metals. Dissimilar metals, as defined in MIL-STD-889, shall not be in contact with each other. Metal plating or metal spraying of dissimilar base metals to provide electromotively compatible abutting surfaces is acceptable. The use of dissimilar metals only when separated by suitable insulating material is permitted, except in systems where bridging of insulation materials by an electrically conductive fluid can occur. Sealants or gel type gasket materials shall be used between faying surfaces and butt joints.

3.3.1.4 Finish. The exterior finish color of the B-52 Drag Chute Stand shall be Ocean Gray, Color Number 26173 of FED-STD-595.

3.3.1.5 Fluid traps and faying surfaces. There shall be no fluid traps on the B-52 Stand. Faying surfaces of all structural joints, except welded joints, shall be sealed to preclude fluid intrusion.

3.3.1.5.1 Ventilation. Ventilation shall be sufficient to prevent moisture retention and buildup.

3.3.1.5.2 Drainage. Drain holes shall be provided to prevent collection or entrapment of water or other unwanted fluid in areas where exclusion is impractical. All designs shall include considerations for the prevention of water or fluid entrapment and ensure that drain holes are located to effect maximum drainage of accumulated fluids. The number and location of drain holes shall be sufficient to permit drainage of all fluids when the unit is in a 10 degree incline in any plane. The minimum size of the drain holes shall be 0.25 inch.

3.3.2 Markings. All external devices which require an operational or maintenance interface shall be marked in accordance with MIL-STD-130. Painted markings shall be 1-inch high block letters unless prohibited by the available space. In such cases, the markings shall be the largest size possible, but shall not be less than ½-inch high. Markings, Information/Caution shall be Lusterless Black, Color Number 37038 of FED-STD-595, and Markings, Warning/Danger shall be Lusterless Red, Color Number 31136 of FED-STD-595. The center of gravity of the B-52 Drag Chute Stand shall be stenciled on the unit within 1.0 inch of the calculated center of gravity.

3.3.3 Identification and information plates.

3.3.3.1 Identification plate. An identification plate in accordance with MIL-STD-130 shall be securely attached to the B-52 Drag Chute Stand in a readily accessible location. The identification plate shall contain the following information: nomenclature, part number, serial number, date of manufacture, manufacturer’s name, Commercial and Government Entity (CAGE) code, date of warranty expiration, and National Stock Number (NSN). The B-52 Stand and any components costing more than $5,000.00 shall be marked and comply with the Item Unique Identification (IUID) requirements of MIL-STD-130. UID information shall be included as both a bar code and human readable markings.

3.3.3.2 Transportation data plate. A transportation data plate shall be securely attached to the B- 52 Drag Chute Stand in a readily accessible location. The plate shall contain at least the following information:

a. Side and rear silhouette views of the B-52 Drag Chute Stand.

b. Horizontal and vertical location of the center of gravity of the B-52 Drag Chute Stand in air transportable configuration, marked on the silhouette views.

c. Shipping weight.

d. Loading cubage.

e. Overall height, width, and length.

f. Front and rear axle loads.

g. Tie down information.

3.3.4 Safety.

3.3.4.1 System safety. The design of the B-52 Stand shall not contain any system safety mishap risk categories greater than medium as defined in Table A-IV of MIL-STD-882.

3.3.4.2 Component protection. All space in which work is performed during operation, service, and maintenance shall be free of hazardous protrusions, sharp edges, or other features which may cause injury to personnel. All rotating and reciprocating parts and all parts subject to high operational temperatures or subject to being electrically energized, that are of such nature or so located as to be hazardous to personnel, shall be guarded or insulated to eliminate the hazard.

3.3.4.3 Foreign object damage (FOD). All loose metal parts, such as pins or connector covers, shall be securely attached to the B-52 Stand with wire ropes or chains. "Dog tag" style beaded chains shall not be provided. Removable panels, if provided, shall be attached with captive fasteners. Tire valve stem caps shall be made of plastic.

3.3.4.4 Electrostatic discharge. The design of the B-52 Drag Chute Stand shall preclude equipment damage due to electrostatic discharge (ESD), protect personnel from electrical shock due to static charging, and prevent ignition of explosive atmospheres due to sparking.

3.3.5 Human factors. The B-52 Drag Chute Stand shall be designed in accordance with MIL- STD-1472 for ease of operation, inspection, and maintenance, including the use of arctic mittens and Mission-Oriented Protective Posture (MOPP) Level 4 Chemical Warfare Gear.

3.3.6 Fastening devices. All screws, bolts, nuts, pins, and other fastening devices shall be properly designed, manufactured, and installed with adequate means of preventing loss of torque or adjustment. Cotter pins, lock washers, or nylon patches shall not be used for this purpose, except for the attachment of trim items or as provided in commercial components. Tapped aluminum threads shall have a minimum thread engagement of at least two times the nominal fastener diameter.

3.3.7 Welders and welding. All welders shall be certified to weld in accordance with AWS D1.1 and AWS D1.2. The contractor shall make available to the Government certifications for all welders being utilized on the B-52 Drag Chute Stand. Welding procedures and all welding on the B-52 Stand shall be in accordance with AWS D1.1 and AWS D1.2. The parts’ surfaces, to be welded, shall be free from rust, scale, paint, grease, and other foreign matter. Welds shall be of sufficient size and shape to develop the full strength of the welded parts. Welds shall transmit stress without cracking or permanent distortion when the parts connected by the welds are subjected to test, proof, and service loadings.

3.3.8 Foolproofness. Where improper installation of an item causes a malfunction, an asymmetric mounting system shall be provided, where practical, to ensure proper mounting of the item.

3.3.9 Service life. The B-52 Drag Chute Stand shall be designed for a minimum service life of 25 years.

3.4 Environmental conditions.

3.4.1 Operating temperature range. The B-52 Drag Chute Stand shall be capable of operating in ambient temperatures ranging from -40 F to +140 F.

3.4.2 Storage temperature range. The B-52 Drag Chute Stand shall be capable of being stored in ambient temperatures ranging from -65 F to +160 F.

3.4.3 Precipitation.

3.4.3.1 Rain. The B-52 Drag Chute Stand shall be capable of storage and operation during rainfall of 5-inches per hour for three consecutive hours and 10-inches per hour for 10 consecutive minutes, with winds of up to 35 knots; and with 6-inches of rain per hour impinging on the B-52 Stand at angles from vertical to 45°.

3.4.3.2 Snow and ice. The B-52 Drag Chute Stand shall be capable of storage and operation during snow accretion up to 2-inches per hour for at least 12 hours and up to 1.5-inches of ice.

3.4.4 Solar radiation. The B-52 Drag Chute Stand shall not be adversely affected by full time exposure to solar radiation, such as those conditions encountered in desert environments.

3.4.5 Fungus. All materials used in the B-52 Drag Chute Stand shall be fungus resistant or shall be suitably treated to resist fungus. Materials treated for fungus resistance shall retain their original electronic and physical properties, shall not present toxic hazards, and treatment shall last for the entire service life of the part. The B-52 Stand shall be suitable for operation and storage in conditions encountered in a tropical environment.

3.4.6 Salt fog. The B-52 Drag Chute Stand shall be capable of storage and operation in high temperature, high humidity, salt laden, sea coast environments without damage or deterioration of performance.

3.4.7 Sand and dust. The B-52 Drag Chute Stand shall be capable of storage and operation during exposure to wind-blown sand or dust without damage or deterioration of performance.

3.5 Transportability.

3.5.1 Surface transportability. The B-52 Drag Chute Stand shall be transportable via all modes of surface shipment: rail, sea, road, etc. and shall be capable of withstanding mechanical shock and vibration characteristics of rail, sea, and road transport.

3.5.2 Air transportability. The B-52 Drag Chute Stand shall be transportable on C-5 and C-17 aircraft. Design criteria can be found in MIL-HDBK-1791. In all air transport configurations, the B-52 Stand shall be capable of being restrained and withstanding, without loss of serviceability, 2.0 G up and 4.5 G down accelerations, and shall be capable of being restrained and withstanding, without loss of structural integrity, 3.0 G forward, 1.5 G aft, and 1.5 G lateral accelerations. The B-52 Stand shall be equipped with pressure relief devices or configured for air transport to prevent any part from becoming a projectile in the event of catastrophic loss of aircraft cabin pressure.

3.5.2.1 Tire pressure. Tire pressure shall not exceed 100 pounds per square inch (psi) and shall not be reduced for air transport.

3.5.2.2 Tiedowns. The B-52 Drag Chute Stand shall be symmetrically restrained during air and ground transport. Tiedown points shall be rated at a minimum of 25,000 pounds, marked for capacity, with a clear opening compatible with the appropriate devices. Each end of each tiedown device shall terminate at a tiedown point and not pass through any other tiedown point.

There shall be no interference between tiedown devices and the B-52 Stand.

3.5.2.3 Winch points. Winch points shall be provided at the front and rear of the B-52 Drag Chute Stand for aircraft loading using the aircraft’s winch.

3.5.2.4 Equipment removal and reconfiguration. Preparation for air transport shall take no more than forty (40) man-hours and restoration to operating configuration shall take no more than forty (40) man-hours for five (5) persons using common hand tools (see 6.3.1). All equipment removed shall be capable of being palletized; caps and plugs shall permit moving and storage in transport configuration. Platform areas should not be broken down when preparing for air transportation.

3.5.3 Lifting provisions. The B-52 Drag Chute Stand shall be equipped with sufficient attachment points so located that it can be lifted by crane; each attachment point shall be marked "Lift Point". The lifting provisions shall be in accordance with MIL-STD-209.

3.6 Maintainability.

3.6.1 Preventive maintenance.

3.6.1.1 Mean time between preventative maintenance. The B-52 Drag Chute Stand shall have a mean time between preventative maintenance (MTBPM) of not less than 250 operating hours and not less than 500 cycles. MTBPM of 500 operating hours or greater is a goal.

3.6.1.2 Tasks. Preventative maintenance tasks shall be limited to a maximum of eight (8) man-hours.

3.6.1.3 Cycle. One cycle consists of towing the stand to specified location and returning it to its original location. During this cycle, the following criteria shall be met:

a. Two ninety (90) degree turns must be made.

b. All jacks must be activated and locked at destination.

3.6.2 Inspection and servicing provisions. Routine servicing tasks and pre-use inspections shall require no hand tools.

3.7 Safety standards. The B-52 Stands shall conform to all applicable sections and paragraphs of OSHA 1910.29 and AFOSH 91-501 standards. The contractor shall be solely responsible for ensuring that the stands meet all applicable OSHA and AFOSH Standards as they apply to aircraft maintenance stands. The B-52 Stands shall successfully pass an OSHA and AFOSH safety inspection, conducted by a government safety inspector, during the Preproduction Operational Inspection.

3.7.1 Fall protection. Fall protection system shall be provided on each B-52 Stand as applicable per AFOSH 91-501 and OSHA 1910.66 Appendix C. Anchors, when required by contractor design, shall conform to ANSI Z359.1 performance and design criteria.

3.8 Performance.

3.8.1 Footprint.

3.8.1.1 Stand footprint. The dimensional footprint of the B-52 Drag Chute Stand shall be not more than 178 inches long by 148 inches wide with a height of 344 inches. When deemed necessary (approved by the Government) to meet all applicable OSHA/AFOSH requirements the offeror shall be allowed to exceed dimensional footprint of the stand by no more than 25% in any direction.

3.8.1.2 Platform footprint. The upper platform shall be located at a height of 186 inches. The upper platform shall be 178 inches long by 148 inches wide and wrap around the tail section of the B-52 aircraft (see Appendix A B-52 Tail Section Dimensions, specifically Figure 1 3-D view, Figure 2 Rear view, and Figure 3 Side View) to allow maintenance personnel to hoist and load the drag chute. The lower platform shall be located at a height of 130 inches. The lower platform shall allow the maintenance personnel access to the drag chute door (lower platform should be at least 4 ft long by 4 ft wide).

3.8.1.3 Weight. The weight of the B-52 Drag Chute Stand shall not exceed 3,500 lbs.

3.8.1.4 Working load. The B-52 Stand’s two working levels shall support a minimum load of 750 lbs for the lower platform and 1,500 lbs for the upper platform. Platform fatigue in the form of “oil canning” or waviness in the platform decking is unacceptable. The two working levels shall be designed to provide a safety factor of at least 4 times the design working load, while accomplishing any of the performance requirements stated herein. Safety factors shall be based on minimum material yield strength. Platform levels shall be designed for a minimum of 40 lb per square foot loading criteria.

3.8.2 Mobility. The B-52 Drag Chute Stand shall comply with all mobility requirements specified in AS8090 for Type I, Class 2 equipment ground mobility.

3.8.2.1 Towbar. A towbar shall be provided on the B-52 Stand to provide a means of attaching a towing vehicle for movement of the stand in maintenance areas and across the flightline. The towbar shall be stowable in a location that does not interfere with visibility, jack operations, or B-52 maintenance operations. The towbar shall have a lunette eye conforming to A-A-52464B.

The towbar shall be attached to the frame of the B-52 Stand at two points to preclude “weaving” during tow operations.

3.8.3 Casters. The B-52 Drag Chute Stand shall utilize casters with pneumatic tires that shall be steerable, lockable in forty-five (45) degree increments, durable and capable of withstanding operation over rough improved surfaces (potholes), inclines, or hangar door tracks without causing damage to the stands or casters. The pneumatic tires shall be of rated-capacity to be at least equal to the load imposed on each tire. The casters shall include a pneumatic poly cam style brake.

3.8.4 Rolling force/resistance. The force required to move each stand shall not exceed the values in MIL-STD-1472 and associated tables, Paragraph 5.9.11.4.1 (high traction). The number of personnel required to move each stand shall not exceed two (2) people (5 th percentile females).

3.8.5 Platform.

3.8.5.1 Deck surface. All decking surfaces shall be anti-skid and resistant to jet fuel, aircraft hydraulic fluid, and cleaning and degreasing solvents. Anti-skid surfaces shall prevent slipping and allow for kneeling, crouching, and lying down of maintainers without causing minor injuries such as abrasions during aircraft maintenance. Kick-plates shall be provided around perimeter of the stand in accordance with OSHA 1910.29 and AFOSH 91-501.

3.8.5.2 Handrails. Handrails / guard rails shall comply with all OSHA / AFOSH standards. The perimeter railing shall be operated by one person. All rails that can be removed shall have a locking mechanism (i.e quick release pin with retaining chain / nut and bolts) that will be engaged whenever the rails are in position.

3.8.5.3 Platform access opening. The platform access opening shall be used for the entry and exit of the platform from the ladder / staircase. The platform access opening shall include a means of closing / blocking when personnel are on the platform. The system for closing / blocking the access opening shall not interfere with the platform working area.

3.8.6 Hoist. The B-52 Drag Chute Stand hoist shall be a trolley-type design in accordance with ASME B30.2. The hoist’s minimum lifting capacity shall be 500 pounds (lbs). The hoist will be mounted on the upper platform and capable of lifting from the ground level to the upper platform. The hoist shall include a means to prevent the suspended load from self-lowering.

3.8.7 Stabilizer jacks. The B-52 Drag Chute Stand shall utilize at least 4 stabilizer jacks. The jacks shall be capable of leveling and stabilizing the stand. The jacks shall be retractable and self-locking for towing operations.

3.9 Workmanship. The B-52 Drag Chute Stand, including all parts and accessories, shall be constructed and finished in a thoroughly workmanlike manner. Workmanship objectives shall include freedom from blemishes, defects, burrs and sharp corners and edges; accuracy of dimensions, surface finish, and radii of fillets; thoroughness of welding, painting, and riveting;

marking of parts and assemblies; proper alignment of parts and tightness of assembly fasteners;

etc.

3.9.1 Bolted connections. Bolt holes shall be accurately punched or drilled and shall be deburred. Threaded fasteners shall be tight and shall not work loose during testing or service usage.

3.9.2 Riveted connections. Rivet holes shall be accurately punched or drilled and shall be deburred. Rivets shall be driven with pressure tools and shall completely fill the holes. Rivet heads shall be full, neatly made, concentric with the rivet holes, and in full contact with the surface of the component.

3.9.3 Gear and lever assemblies. Gear and lever assemblies shall be properly aligned and meshed and shall be operable without interference, tight spots, loose spots, or other irregularities.

Where required for accurate adjustment, gear assemblies shall be free of excessive backlash.

3.9.4 Cleaning. The B-52 Drag Chute Stand shall be thoroughly cleaned. Loose, spattered, or excess solder; welding slag; stray bolts, nuts, and washers; rust; metal particles; pipe compound;

and other foreign matter shall be removed during and after final assembly.

3.9.5 Tooling. Standard commercial tooling shall be utilized wherever possible. In the event that standard commercial tooling cannot be used and specialized tooling is required, one (1) set of special tool kits shall be provided with each maintenance stand. Metric tools are not considered special tools. The maintenance stand shall be field maintainable using a minimum number of common standard hand tools. All major components shall be replaceable by field level maintenance technicians. The field shall be capable of repairing 80% of the repairable parts. All inspections shall be capable of being performed from a standing position.

3.10 Instructional media package. Maximum use of exportable courses is required (i.e.

DVD/CD). Courses shall provide training on servicing, operational checks, theory of operation, adjustment procedures, troubleshooting, and associated diagrams. Two sets of courses shall be delivered to each location with production hardware.

4. VERIFICATION

4.1 Classification of inspections. The inspection requirements specified herein are classified as follows:

a. Preproduction inspection (see 4.2).

b. Operational inspection (see 4.3).

c. Conformance inspection (see 4.4).

4.2 Preproduction inspection. The preproduction B-52 Drag Chute Stand shall be subjected to the examinations, tests, and analyses described in 4.6.1 through 4.6.12. The contractor shall provide or arrange for all test equipment and facilities.

4.3 Operational inspection. A 30-day operational inspection will be performed following the successful completion of the preproduction tests specified section 4.6. The inspection will be performed at locations chosen by the Government and defined in the contract. The inspection will begin the day following the delivery of the B-52 Drag Chute Stand to the specified locations.

4.4 Conformance inspection. Each production B-52 Drag Chute Stand shall be subjected to the examinations and tests described in 4.6.1.

4.5 Inspection requirements.

4.5.1 General inspection requirements. Apparatus used in conjunction with the inspections specified herein shall be laboratory precision type, calibrated at proper intervals to ensure laboratory accuracy.

4.5.2 Data. During all testing specified herein, at least the following data, unless not applicable, shall be recorded at intervals not to exceed 30 minutes. Additional data and/or shorter intervals shall be provided as appropriate for any specific test.

a. Date.

b. Time started.

c. Time finished.

d. Ambient temperature.

4.5.3 Test rejection criteria. Throughout all tests specified herein, the B-52 Drag Chute Stand shall be closely observed for the following conditions, which shall be cause for rejection:

a. Failure to conform to design or performance requirements specified herein or in the contractor's technical proposal.

b. Any spillage or leakage of any liquid, including lubricant or hydraulic fluid, under any condition, except as allowed herein.

c. Structural failure of any component, including permanent deformation, or evidence of impending failure.

d. Evidence of excessive wear.

e. Evidence of misalignment to the aircraft; including inability to provide safety compliant working surfaces.

f. Interference between the maintenance stand components or between the stand, the ground, and all required obstacles, with the exception of normal contact by the tires.

g. Misalignment of components.

h. Evidence of undesirable roadability characteristics, including instability in handling during cornering, braking, and while traversing all required terrain.

i. Conditions that present a safety hazard to personnel during operation, servicing, or maintenance.

j. Evidence of corrosion or deterioration.

4.6 Test methods.

4.6.1 Examination of product. Each B-52 Drag Chute Stand shall be examined to verify compliance with the requirements herein. A contractor-generated, Government-approved checklist that identifies each relevant requirement not verified by a test or analysis and the inspection results shall be used. Particular attention shall be given to materials, workmanship, dimensions, surface finishes, protective coatings and sealants and their application, welding, fastening, and markings. Proper operation of each maintenance stand function shall be verified.

Each production stand shall be inspected to a Government-approved reduced version of the checklist.

Paragraph

Required Certifications and Analyses

3.3.4.1 System safety. Contractor system safety hazard analysis (see

4.6.2).

3.3.9 Service life. Contractor analysis of the service life

requirement (see 4.6.3).

Paragraph

Required Certifications and Analyses

3.4.4 Solar radiation. Contractor certification that the drag chute stand performance is not adversely affected by full time exposure to solar radiation, such as those conditions encountered in desert environments.

3.4.5 Fungus. Contractor certification that the materials used in construction of the drag chute stand is fungus resistant or suitably treated to resist fungus.

3.5.1 Surface transportability. Contractor surface transportability analysis (see 4.6.5.1) and certification that the drag chute stand is transportable via all modes of surface shipment: Rail, sea, road, etc., and is capable to withstand mechanical shock and vibration characteristics of rail, sea, and road transport.

3.5.2 Air transportability., 3.5.2.1 Tire

pressure., 3.5.2.2 Tie downs., and 3.5.2.3 Winch points.

Contractor air transportability analysis (see 4.6.5.2).

3.5.3 Lifting provisions. Contractor lifting provision analysis (see 4.6.5.4).

4.6.2 System safety hazard analysis. A system safety hazard analysis of the B-52 Drag Chute Stand shall be conducted in accordance with 4.2 through 4.8 of MIL-STD-882 to demonstrate compliance with the mishap risk requirement of 3.3.4.1.

4.6.3 Human factors demonstration. The preproduction B-52 Drag Chute Stand shall be capable of performing both operation and inspection tasks by personnel wearing arctic mittens and MOPP Level 4 Chemical Warfare Gear to demonstrate compliance with the requirements of 3.3.5.

4.6.4 Service life analysis. An engineering analysis shall be performed to demonstrate compliance with the service life requirement of 3.3.9.

4.6.5 Environmental testing.

4.6.5.1 High temperature storage and operation test. A preproduction B-52 Drag Chute Stand shall be tested in accordance with MIL-STD-810, Method 501.4, Procedures I and II, to demonstrate compliance with the high temperature storage and operating requirements of 3.4.1 and 3.4.2. Test duration shall be one 24-hour cycle for each procedure.

4.6.5.2 Low temperature storage and operation test. A preproduction B-52 Drag Chute Stand shall be tested in accordance with MIL-STD-810, Method 502.4, Procedures I and II, to demonstrate compliance with the low temperature storage and operating requirements of 3.4.1 and 3.4.2. Test duration shall be one 24-hour cycle for each procedure.

4.6.5.3 Precipitation tests.

4.6.5.3.1 Rain test. A preproduction B-52 Drag Chute Stand shall be tested in accordance with MIL-STD-810, Method 506.4, Procedure I, to demonstrate compliance with 3.4.3.1.

4.6.5.3.2 Ice accretion test. A preproduction B-52 Drag Chute Stand shall be tested in accordance with MIL-STD-810, Method 521.2 with an ice thickness of 1.5-inches to demonstrate compliance with the ice accretion requirement of 3.4.3.2.

4.6.5.4 Salt fog test. A preproduction B-52 Drag Chute Stand shall be tested in accordance with MIL-STD-810, Method 509.4, to demonstrate compliance with 3.4.6. Test duration shall be alternating 24-hour periods of salt fog exposure and drying conditions for 24-hour periods (two wet and two dry).

4.6.5.5 Sand and dust test. A preproduction B-52 Drag Chute Stand shall be tested in accordance with MIL-STD-810, Method 510.4, Procedures I (12 hours) and II (90 minutes per side), to demonstrate compliance with 3.4.7.

4.6.6 Transportability verification.

4.6.6.1 Surface transportability analysis. An engineering analysis shall be performed to demonstrate compliance with 3.5.1. The engineering analysis shall utilize the data for rail, ship, and road transportation modes referenced in MIL-STD-810, Method 514.5.

4.6.6.2 Air transportability analysis. An engineering analysis shall be performed to demonstrate compliance with the air transportability requirements of 3.5.2 through 3.5.2.3. The analysis shall include the tie downs and all major components and their ability to withstand the accelerations specified in MIL-HDBK-1791. The evaluation shall also include a dimensional analysis for the B-52 Drag Chute Stand while traversing the ramp and while loaded aboard C-17 and C-5 aircraft.

4.6.6.3 Equipment removal and reconfiguration test. A preproduction B-52 Drag Chute Stand shall be configured for transport on C-17 and C-5 aircraft and then reconfigured for operation to demonstrate compliance with 3.5.2.4. It shall be demonstrated that the forces required do not exceed those allowed in MIL-STD-1472.

4.6.6.4 Lifting provision analysis. An engineering analysis shall be performed to demonstrate compliance with the lifting provision requirements of 3.5.3.

4.6.7 Maintainability demonstration. Corrective maintenance tasks shall be selected by the procuring activity from an approved list of tasks provided by the contractor and shall be performed. This list shall represent all expected failures over the life of the B-52 Drag Chute Stand. Thirty of the tasks shall be selected by the Government. As part of this demonstration, the recommended frequencies of the scheduled maintenance tasks and the times recorded to accomplish the tasks shall be used to develop an expected value of scheduled maintenance time per measure of use, such as calendar time and hours of operation. The capability of performing both preventive and corrective maintenance tasks by personnel wearing arctic mittens and MOPP Level 4 Chemical Warfare Gear shall be demonstrated.

4.6.8 Fall protection system. The stand shall demonstrate compliance with the fall protection requirements of 3.7 through 3.7.1. Installation of fall protection equipment shall be verified to be in conformance with the manufacturer’s explicit instructions. Fall Protection Equipment with Certificates of Conformance to the standards specified in this document does not require individual load testing.

4.6.9 Platform.

4.6.9.1 Dimension measurement tests. A preproduction maintenance stand shall be measured to demonstrate compliance with the dimensional requirements of 3.8.1 through 3.8.1.2.

4.6.9.2 Weight measurement tests. The weight of a preproduction maintenance stand shall be measured to demonstrate compliance with the weight requirements of 3.8.1.3.

4.6.9.3 Platform load tests. The preproduction maintenance stand shall be loaded to four (4) times their maximum load capacity in compliance with the requirements of 3.8.1.4.

4.6.9.4 Platform requirements tests. A preproduction maintenance stand shall be inspected to demonstrate compliance with the requirements of 3.8.5 through 3.8.5.3.

4.6.10 Towing/maneuverability tests. A preproduction maintenance stand shall be inspected and operated to demonstrate compliance with the requirements of 3.8.2 through 3.8.2.1. The stand shall be tested IAW SAE AS8090 for a Type I, Class 2 vehicle. The stand shall be tested at speeds up to 5 mph, with a 35 foot maximum safe turning radius. All components shall remain securely fastened in place and in an operable condition.

4.6.10.1 Caster tests. A preproduction maintenance stand shall be inspected and operated to demonstrate compliance with the requirements of 3.8.3.

4.6.10.2 Rolling force/resistance tests. A preproduction maintenance stand shall be inspected and operated to demonstrate compliance with the rolling force requirements of 3.8.4.

4.6.11 Hoist tests. A preproduction maintenance stand shall be inspected and operated to demonstrate compliance with the hoist requirements of 3.8.6.

4.6.12 Stabilizer jack tests. A preproduction maintenance stand shall be inspected and operated to demonstrate compliance with the jack requirements of 3.8.7.

5. PACKAGING

5.1 Packaging requirements. For acquisition purposes, the packaging requirements shall be as specified in the contract or order (see 6.2). When actual packaging of materiel is to be performed by DOD personnel, these personnel need to contact the responsible packaging activity to ascertain requisite packaging requirements. Packaging requirements are maintained by the Inventory Control Point's packaging activity within the Military Department or Defense Agency, or within the Military Department's System Command. Packaging data retrieval is available from the managing Military Department's or Defense Agency's automated packaging files, CD- ROM products, or by contacting the responsible packaging activity.

6. NOTES

(This section contains information of a general or explanatory nature that may be helpful, but is not mandatory.)

6.1 Intended use. The maintenance stand covered by this purchase description is intended for use by maintenance personnel for the servicing of the B-52 Drag Chute. These stands are military unique since they are designed specifically for the B-52 aircraft.

6.2 Acquisition requirements. Acquisition documents must specify the following:

a. Title, number, and date of this purchase description.

b. If preproduction inspection is required (see 3.1).

c. Packaging requirements (see 5.1).

APPENDIX A

B-52 DRAG CHUTE TAIL SECTION DIMENSIONS

FIGURE 1. B-52 drag chute 3-D view

FIGURE 2. B-52 drag chute rear view

FIGURE 3. B-52 drag chute side view