IRAC_130000ZMAY16.pdf

INTERIM RAPID

ACTION CHANGE

13600 Ser: AIR-4.1/16-030 Date: 13 MAY 2016

Category: Priority

From: NAWCAD PATUXENT RIVER MD, 20670 To: GENERAL SERIES ADRL for 01-1B-50

Subj: INTERIM RAPID ACTION CHANGE (IRAC) NO 01 TO JOINT SERVICE TECHNICAL

MANUAL (NAVAIR 01-1B-50 ORGANIZATIONAL INTERMEDIATE AND DEPOT MAINTENANCE

AIRCRAFT WEIGHT AND BALANCE) OF 01-AUG-2015.

References: (a) TPDR N00421-16-0106 OF 31 MAR 2016

(b) NAVAIR 01-1B-50

Encl: (1) List of Tables, replace page iii/(iv Blank)

(2) Chapter 3, replace page 3-4

(3) Chapter 3, add new page 3-5/(3-6 Blank)

Point of Contact:

A. M.K. Cruse, General Series Data Manager, Commercial (619) 545-3646, DSN 735-3646, E-Mail -maria.cruse@navy.mil, FRCSW North Island, AIR-6.8.5.1

B. Paul Kachurak, Mass Properties Division Head, Commercial (301) 757-2010, E-Mail - Paul.Kachurak@navy.mil, NAVAIR, Code 4.1.7

1. Purpose of Change: To increase mission capability by providing new weight and balance information required by the Air Force. This IRAC answers Ref. (a).

2. Detailed Information:

a. Pen and ink changes to the technical content of a manual are not authorized. The following technical content change information applies to the referenced pages, paragraphs, and figures of the subject manual until formal update is released.

b. Ref. (b), List of Tables, replace page iii/(iv Blank) with Enclosure (1).

c. Ref. (b), Chapter 3, replace page 3-4 with Enclosure (2).

d. Ref. (b), Chapter 3, add new page 3-5/(3-6 Blank), with Enclosure (3).

3. Validated by: NAVAIR, Code 4.1.7, Paul Kachurak, Commercial (301) 757-2010.

Subj: INTERIM RAPID ACTION CHANGE (IRAC) NO 01 TO JOINT SERVICE TECHNICAL

MANUAL (NAVAIR 01‑1B‑50 ORGANIZATIONAL INTERMEDIATE AND DEPOT MAINTENANCE

AIRCRAFT WEIGHT AND BALANCE) OF 01‑AUG‑2015.

4. Related Instructions:

a. For IRACs affecting manuals in paper copy – Maintain this IRAC with the applicable manual by placing or attaching the cover letter directly behind the title page. Mark the specific change area in the margin of each page affected and annotate the changed page or card listed on the A Page with a vertical line and the IRAC number. Replacement page(s) shall be inserted as directed in paragraph 2.b. This Type B IRAC shall not be removed until receipt of the formal update.

b. For IRACs affecting manuals on digital media – affix an adhesive label to the digital media case annotated with the applicable publication number and IRAC number. The label should be positioned to allow for additional IRACs as they occur and should not cover the date or digital media title. Maintain the IRAC on file until receipt of the superseding digital media.

c. Subject IRAC shall be incorporated into applicable manual no later than 12 months after IRAC issue date by FRCSW North Island, AIR-6.8.5.1.

By Direction Donald S. Young

IRAC #1 - 13 May 2016 NAVAIR 01-1B-50

AIRFORCE TO 1-1B-50

COAST GUARD TO 1-1B-50

ARMY TM 55-1500-342-23

iii/(iv Blank) Encl. (1)

Figure Title Page Figure Title Page

LIST OF ILLUSTRATIONS

2-1. Weight Terminology ........................................2-1 2-2. Calculating Aircraft CG ...................................2-2 2-3. Balance Arm Fuselage Station .......................2-3 2-4. Percent MAC Example ...................................2-4

5-1. Typical Platform Scale Assembly ....................5-1 5-2. Electronic Weighing Kit (Typical) ....................5-2 5-3. Load Cell and Jack .........................................5-2 5-4. Reading a Hydrometer ....................................5-3 5-5. Accessory Weighing Kit ..................................5-4 5-6. Estimation of “As Weighed” Weight ................5-6 5-7. Leveling Lugs Inside the Aircraft .....................5-7 5-8. Leveling Lugs Outside the Aircraft ..................5-7 5-9. Plumb Bob ......................................................5-8

6-1. Load Adjuster ..................................................6-3

7-1. Asymmetric Configurations .............................7-1 7-2. Aircraft Balance Point .....................................7-2

7-3. Locating Aircraft Center of Gravity ..................7-3

B-1. Sample DD Form 365 Record of Weight and Balance Personnel .................. B-2

B-2. Sample DD Form 365-1 Chart A - Basic Weight Checklist Record .................. B-3

B-3. Sample DD Form 365-2 Form B - Aircraft Weighing Record ........................... B-4

B-4. Sample DD Form 365-3 Chart C - Basic Weight and Balance Record ............. B-6

B-5. Sample DD Form 365-4 Weight and Balance Clearance Form F - Transport ...... B-7

B-6. Sample DD Form 365-4 Weight and Balance Clearance Form F - Tactical ......... B-8

Table Title Page Table Title Page

LIST OF TABLES

Repairs Guidelines ......................................3-5

5-1. Weighing Tolerances .......................................5-9

8-1. USN/USMC Aircraft Classification Table .......8-14

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3-3

01 August 2015 NAVAIR 01-1B-50

AIRFORCE TO 1-1B-50

COAST GUARD TO 1-1B-50

ARMY TM 55-1500-342-23

NOTE

If sufficient data is available to accurately reflect the aircraft's lost or damaged weight and balance data pages, as in the case of worn or water damaged pages, accomplish items 3.7.4.1 through 3.7.4.9 above as deemed necessary by the individual assigned responsibility for weight and balance. This may require obtaining a recent Chart A and Form B from the last weighing and making all applicable changes to the Chart C via a complete inventory and verification of all modifications (TCTO/MWO/TD) made since the last weighing. This is only possible if changes since the last weighing are known with full confidence. AWBS data (or equivalent) can also be used to create a replacement copy of the lost paper aircraft handbook.

3.7.4.10 Authorized Substitute Forms. Hard copies of

an electronic equivalent may be used in lieu of the DD Form 365 charts, forms, and records. (See Section 8 - Service Specific Requirements).

3.7.5 Entry Errors On Forms. If errors are found on

the forms in the weight and balance handbooks, do not erase or change the entry. With paper forms, line out the erroneous entry and correct the entry. Make a note in the Chart C pertaining to the correction.

3.7.6 Supply Of Forms. Forms prescribed in this

manual may be requisitioned through normal distribution channels or copied from the examples in Appendix B.

3.7.7 Charts / Forms / Records Disposition. Charts, Forms and Records shall be maintained in accordance with Section 8 - Service Specific Requirements.

3.8 WEIGHT AND BALANCE FLIGHT CLEARANCE.

Weight and balance flight clearance is accomplished to ensure that aircraft remain within safe weight and balance limits during takeoff, flight, and landing. Such clearance is recorded through the use of the Weight and Balance Clearance Form F, or through an authorized electronic substitute. The original copy of the Form F, when properly signed and filed in accordance with applicable procedures stated in this manual and other service directives serve as the record to certify that weight and balance flight clearance was properly accomplished.

(See Section 8 - Service Specific Requirements).

3.8.1 Required Clearance. Weight and balance flight

clearance is required for Class 1B and Class 2 aircraft.

3.8.2 Form F Maintenance Procedures. All Forms F

shall be completed in accordance with the instructions of this technical manual. Forms F are utilized on a ONE TIME USE basis, or are CANNED for multiple uses.

3.8.3 One Time Use Form F. These are Forms F

prepared for use on a one time basis and are kept on file for 90 days upon mission completion or in accordance with command procedures. They are used when the Command does not utilize a CANNED Form F approach or when an aircraft is loaded in a manner for which no CANNED Form F is on file or applicable. (See Section 8 - Service Specific Requirements).

3.8.4 Canned Form F. These are Forms F prepared

for “repetitive use” when an aircraft's Basic Weight and moment remain within certain specified tolerances as defined by appropriate Service Engineering Organization.

(See Section 8 - Service Specific Requirements). They are filed in accordance with established Command procedures for future reference and use. CANNED Forms F shall be checked at least every 180 days for accuracy and a new Form F prepared as required. (See Section 8 - Service Specific Requirements). If no changes are required, the Form F may be re-dated and initialed, or a letter issued to state the review has been accomplished to certify its currency.

3.8.5 Clearance Procedure. When filing DD Form 175, Military Flight Plan (or authorized substitute), the basis for weight and balance flight clearance shall be noted.

For ONE TIME USE Forms F, attach the original form to the flight plan, retain a copy with the aircraft until flight termination, and retain a copy in the weight and balance handbook with the aircraft custodian/technician for 90 days upon mission completion or in accordance with command procedures. For CANNED Forms F, retain the forms in the weight and balance handbooks until superseded.

3.8.6 Authorized Substitutions For Dd Form 365-4. The

following substitutes are authorized for use as weight and balance clearance records in lieu of DD Form 365-4.

3.8.6.1 Computer output sheets when the data recorded

is identical to that required on the DD Form 365-4.

3.8.6.2 The designated commercial type loading

schedule for C-9 and C-40 aircraft.

3-4

IRAC #1 - 13 May 2016NAVAIR 01-1B-50

AIR FORCE TO 1-1B-50

COAST GUARD TO 1-1B-50

ARMY TM 55-1500-342-23

Encl. (2)

3.8.6.3 Other Commercial loading schedules approved

by the appropriate Service Engineering Organization.

3.8.6.4 Computer programs that replicate the DD Form

365-4 forms shall follow the requirements in Section 6-3.1 of this Technical Manual.

3.9 AIRCRAFT WEIGHING REQUIREMENTS. Aircraft

shall be weighed when any of the following conditions exist:

a. As required by pertinent service directives or technical directives.

b. When weighing requirements are specified in the applicable aircraft loading/operators manual/Chart E.

c. After completion of selected depot level events as defined by appropriate Service Engineering Organization.

NOTE

Selected depot level events include the replacement of major structural members such as spars, wings, tail booms

d. When major modifications or repairs are made:

(1) The weight and balance technician/custodian or appropriate Service Engineering Organization authority shall determine when an aircraft has undergone a “major modification or repair”. As a guideline, a major modification or repair is one that affects the Basic Weight to an extent that exceeds the thresholds as reflected in Table 3-1. (See Section 8 - Service Specific Requirements).

(a) For USAF aircraft, Table 3-1 is not applicable as Basic Weight change threshold criteria for determining a major modification or repair on aircraft with a full weigh and update of the DD Form 365-2: Form B dated on or before 31 December 2016. Table 3-2 will become effective on individual aircraft following a full weigh and update of the DD Form 365-2: Form B dated on or after 1 January 2017.

(2) When one or more modifications (minor or major) are subsequently made to an aircraft since last actual weighing that cumulatively affect Basic Weight by thresholds that meet or exceed Table 3-1 criteria, a weighing is required. Chart A items are excluded.

(a) For USAF aircraft, Table 3-1 is not applicable as Basic Weight change threshold criteria due to modification(s) or repair(s) on aircraft with a full weigh and update of the DD Form 365-2: Form B dated on or before 31 December 2016. Table 3-2 will become effective on individual aircraft following a full weigh and update of the DD Form 365-2: Form B dated on or after 1 January 2017.

(3) Example (Not applicable to USAF). First modification of an aircraft since last actual weighing removes 100 pounds wiring and installs 105 pounds wiring. Second modification a few months later removes 25 pounds structure and installs 30 pounds structure.

The cumulative Weight Affected of the two modifications since last actual weighing is 260 pounds.

e. When aircraft modifications or repairs are accomplished and calculated or actual weight and moment data for the modification is not available or reliable.

f. When an aircraft is completely stripped and repainted or additional layer(s) of paint is added to the entire aircraft. Consult Service Engineering Organization for guidance when aircraft are partially painted.

g. When the weight and balance data is suspected to be in error.

Aircraft Basic Weight (Pounds) Weight Affected by Major Mod as Percent of Basic Weight CG Change (Inches, %MAC or Index)

0-5,000 2.00% 0.5

5,001-50,000 1.50% 0.5

> 50,000 1.00% 0.2

Use inches for rotary wing aircraft and %MAC for fixed wing aircraft, or Index for selected aircraft.

Table 3-1. Major Modifications or Repairs Guidelines

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IRAC #1 - 13 May 2016 NAVAIR 01-1B-50

AIRFORCE TO 1-1B-50

COAST GUARD TO 1-1B-50

ARMY TM 55-1500-342-23

3-5/(3-6 Blank) Encl. (3)

Aircraft Basic Weight (Pounds) Weight Affected by Major Mod as Percent of Basic Weight CG Change (Inches, %MAC or Index)

0-5,000 2.00% 0.5

5,001-50,000 1.50% 0.5

> 50,000 1.00% 0.5

Use inches for rotary wing aircraft and %MAC for fixed wing aircraft, or Index for selected aircraft.

Table 3-2. USAF Major Modifications or Repairs Guidelines

h. When unsatisfactory flight characteristics are reported that cannot be determined to be the result of improper aircraft loading, an error in weight and balance data, or any other identifiable cause.

i. When an aircraft is in a depot facility or other authorized weighing facility for any reason, and has not

particular TMS/MDS aircraft.

j. Whenever inactive aircraft become active as described in paragraph 3.7.

k. When the weight and balance handbook needs replacement and sufficient data is not available to accurately reflect the aircraft’s lost or damaged weight and balance data pages, as described in paragraph 3.7.

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