### Commercial **Airplanes** 

# 767 Service Bulletin **SPECIAL ATTENTION Number: 767-57-0121**  Original Issue: October 07, 2010 Revision 2: January 10, 2012 ATA System: 5700 **SUBJECT:**WINGS - Leading Edge and Leading Edge Devices - Leading Edge Fluid Drainage Path Change Export of this technology is controlled under the United States Export Administration Regulations (EAR) (15 CFR 730-774). An export license may be required before it is used for development, production or use by foreign persons from specific countries. The controller of this data has the individual responsibility to abide by all export laws.9E991 ECCN: 

## BOEING PROPRIETARY, CONFIDENTIAL, AND/OR TRADE SECRET Copyright © 2010 The Boeing Company Unpublished Work - All Rights Reserved Boeing claims copyright in each page of this document only to the extent that the page contains copyrightable subject matter. Boeing also claims copyright in this document as a compilation and/or collective work. This document includes proprietary information owned by The Boeing Company and/or one or more third parties. Treatment of the document and the information it contains is governed by contract with Boeing. For more information, contact The Boeing Company, P.O. Box 3707, Seattle, Washington 98124. Boeing, the Boeing signature, the Boeing symbol, 707, 717, 727, 737, 747, 757, 767, 777, 787, Dreamliner, BBJ, DC-8, DC-9, DC-10, KC-10, KDC-10, MD-10, MD-11, MD-80, MD-88, MD-90, P-8A, Poseidon and the Boeing livery are all trademarks owned by The Boeing Company; and no trademark license is granted in connection with this document unless provided in writing by Boeing.

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: October 07, 2010 767-57-0121 Revision 2: January 10, 2012 1 of 10 2.0BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: October 07, 2010 767-57-0121 Revision 2: January 10, 2012 2 of 10 **BOEING SERVICE BULLETIN 767-57-0121**

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### Commercial **Airplanes** 

# 767 Service Bulletin **SPECIAL ATTENTION Short Form Revision**  **Number: 767-57-0121** Original Issue: October 07, 2010 Revision 2: January 10, 2012 ATA System: 5700 **SUBJECT:**WINGS - Leading Edge and Leading Edge Devices - Leading Edge Fluid Drainage Path Change Revision 2 is sent to change information. Only the changed information is described below. Revision 1 and Revision 2 are necessary to do the service bulletin. **COMPLIANCE INFORMATION RELATED TO THIS REVISION** No more work is necessary on the airplanes changed in accordance with the original issue or Revision 1 of this service bulletin. Federal Aviation Administration (FAA) Notice of Proposed Rule Making NPRM 2010-NM-272-AD, is related to this service bulletin. **REASON FOR REVISION** This revision is sent to add part marking instructions for the wing panels and ribs modified in figures 1, 2, 5, 6, 7 and 8 and to add replacement parts that are available for purchase. **REVISION HISTORY** October 07, 2010 Original Issue: July 27, 2011 Revision 1: January 10, 2012 Revision 2:
**EFFECTIVITY** 767-200, -300, -300F, -400ER Airplanes. Refer to Paragraph 1.A.1., Airplanes, in Revision 1 of this service bulletin for the list of affected airplanes. **APPROVAL** This service bulletin was examined by the Federal Aviation Administration (FAA). The changes specified in this service bulletin comply with the applicable regulations and are FAA approved, as well as European Aviation Safety Agency (EASA)/Joint Aviation Authorities (JAA) approved for all EASA/JAA approved airplanes listed in the service bulletin effectivity. This service bulletin and its approval were based on the airplane in its original Boeing delivery configuration or as modified by other approved Boeing changes.

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: October 07, 2010 767-57-0121 Revision 2: January 10, 2012 3 of 10If an airplane has a non-Boeing modification or repair that affects a component or system also affected by this service bulletin, the operator is responsible for obtaining appropriate regulatory agency approval before incorporating this service bulletin. **EXISTING INFORMATION** The following is the existing information in the service bulletin: 1. In Paragraph 1.K. - Publications Affected, item 1 is shown as follows: 1. Publications: None. 2. In Paragraph 2.C.2. - Parts and Materials Supplied by the Operator, the table is shown as follows:
**Notes Name**  **QTY Part Number /**  **Specification** (a) Sealant

- BMS5-45 (a) Primer

- BMS10-79, TYPE III (a) Enamel

- BMS10-60, TYPE II, BAC707 GRAY GLOSS (a) Hole Filling Compound

- BMS5-16 (BMS5- 45 CLASS B or BMS5-95 CLASS B or BMS5-142 CLASS B optional) (a) Leveling Compound

- BMS5-125 TYPE III (a) Sealant

- BMS5-142 (BMS5- 45 optional) Chemical Conversion Coating

- Refer to SOPM 20- 43-03 Parting Agent

- Refer to SOPM 20- 50-19 This part replaces existing lower leading edge skin pan 521EB. Panel Assy 1 654T0513-1301

This part replaces existing lower leading edge skin pan 621EB. Panel Assy 1 654T0513-1302

(a) Refer to the Qualified Products List at the end of the Boeing Material Specification (BMS) for supplier data.

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: October 07, 2010 767-57-0121 Revision 2: January 10, 2012 4 of 10 **BOEING SERVICE BULLETIN 767-57-0121**3. In Paragraph 2.C.3. - Parts Modified and Reidentified, the table is shown as follows:
**Notes New Part Number**  **Name QTY**  **Existing Part Number**  (a) (c) (d) (e) 114T2400-( ) Skin Panel, Outboard, Lower Leading Edge, Outboard 1 114T2400-( ) (521EB) (521EB) (b) (a) (c) (d) (e) 114T2400-( ) Skin Panel, Outboard, Lower Leading Edge, Outboard 1 114T2400-( ) (621EB) (621EB) (b) (a) Make the change in accordance with this service bulletin. (b) There is no equivalent Boeing part number for the changed part. Identify on the part that the change done in accordance with this service bulletin was made. (c) This is the part number after the change is done in accordance with this service bulletin. (d) This part is not used in production. (e) A production panel can be purchased from Boeing as an alternative to modifying the existing panel. 4. In Paragraph 3.B., Work Instructions: a. Part 1 is shown as follows: **Part 1 - Lower Wing Skin Change** (1) Change the leading edge lower wing skin panels below in accordance with the applicable figures below: **Right Wing Left Wing**  FIGURE 2 621AB FIGURE 1 521AB FIGURE 4 621EB FIGURE 3 521EB
**NOTE:**The leading edge lower wing skin panels in the table below can be purchased from Boeing with the changes already incorporated by this service bulletin. See the table below for applicable part numbers. **Right Wing Left Wing**  654T0513-1302 621EB 654T0513-1301 521EB (2) Change the seal door at OSS 424.097 in accordance with the figures below: **Right Wing Left Wing**  FIGURE 6 FIGURE 5

BOEING PROPRIETARY -

Copyright © Unpublished Work - See page 1 for details. Original Issue: October 07, 2010 767-57-0121 Revision 2: January 10, 2012 5 of 10 **BOEING SERVICE BULLETIN 767-57-0121**5. In FIGURE 1: LEFT WING SKIN PANEL 521AB CHANGE, the step table is shown with Steps 1 through 6. 6. In FIGURE 2: RIGHT WING SKIN PANEL 621AB CHANGE, the step table is shown with Steps 1 through 6. 7. In FIGURE 5: LEFT WING SEAL DOOR CHANGE AT OSS 424.097, the step table is shown with Steps 1 through 6. 8. In FIGURE 6: RIGHT WING SEAL DOOR CHANGE AT OSS 424.097, the step table is shown with Steps 1 through 6. 9. In FIGURE 7: LEFT WING RIB CHANGE AT OSS 464.475, the step table is shown with Steps 1 through 12. 10. In FIGURE 8: RIGHT WING RIB CHANGE AT OSS 464.475, the step table is shown with Steps 1 through 12.

**CHANGED INFORMATION** For each numbered item in the CHANGED INFORMATION, refer to the same numbered item in the EXISTING INFORMATION. The following is the changed information in the service bulletin: 1. In Paragraph 1.K. - Publications Affected, item 1 is changed as follows: 1. Publications: **Chapter Section Publication**  57-41 767 Illustrated Parts Catalog 2. In Paragraph 2.C.2. - Parts and Materials Supplied by the Operator, the table is changed as follows:
**Notes Name**  **QTY Part Number /**  **Specification** (a) Sealant

- BMS5-45 (a) Primer

- BMS10-79, TYPE III (a) Enamel

- BMS10-60, TYPE II, BAC707 GRAY GLOSS (a) Hole Filling Compound

- BMS5-16 (BMS5- 45 CLASS B or BMS5-95 CLASS B or BMS5-142 CLASS B optional) (a) Leveling Compound

- BMS5-125 TYPE III

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: October 07, 2010 767-57-0121 Revision 2: January 10, 2012 6 of 10 **BOEING SERVICE BULLETIN 767-57-0121 Notes**  **Name QTY**  **Part Number / Specification**  (a) Sealant

- BMS5-142 (BMS5- 45 optional) Chemical Conversion Coating

- Refer to SOPM 20- 43-03 Parting Agent

- Refer to SOPM 20- 50-19 This part replaces existing lower leading edge skin panel 521EB. (b) Panel Assy 1 654T0513-1301

This part replaces existing lower leading edge skin panel 621EB. (b) Panel Assy 1 654T0513-1302

This part replaces existing lower leading edge skin panel 521AB. (b) Panel Assy 1 114T2400-839

This part replaces existing lower leading edge skin panel 621AB. (b) Panel Assy 1 114T2400-840

This part replaces existing seal door panel at OSS 424.097. (b) Door Assy - OSS 424.097 1 114T0205-123

This part replaces existing sealdoor panel at OSS 424.097. (b) Door Assy - OSS 424.097 1 114T0205-123

(a) Refer to the Qualified Products List at the end of the Boeing Material Specification (BMS) for supplier data. (b) These panels can be purchased from Boeing with the changes already incorporated by this service bulletin. 3. In Paragraph 2.C.3. - Parts Modified and Reidentified, the table is changed as follows:
**Notes New Part Number**  **Name QTY**  **Existing Part Number**  (a) (c) (d) (e) 114T2400-( ) Skin Panel, Outboard, Lower Leading Edge, Outboard 1 114T2400-( ) (521AB) (521AB) (b) (a) (c) (d) (e) 114T2400-( ) Skin Panel, Outboard, Lower Leading Edge, Outboard 1 114T2400-( ) (621AB) (621AB) (b) (a) (c) (d) (e) 114T2400-( ) Skin Panel, Outboard, Lower Leading Edge, Outboard 1 114T2400-( ) (521EB) (521EB) (b)

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: October 07, 2010 767-57-0121 Revision 2: January 10, 2012 7 of 10 **BOEING SERVICE BULLETIN 767-57-0121 Notes**  **New Part Number Name**  **QTY Existing Part**  **Number** (a) (c) (d) (e) 114T2400-( ) Skin Panel, Outboard, Lower Leading Edge, Outboard 1 114T2400-( ) (621EB) (621EB) (b) (a) (c) (d) (e) 114T0205-( ) Seal Door - Leading Edge, Outboard Wing 1 114T0205-( ) (521AMB) (521AMB) (b) (a) (c) (d) (e) 114T0205-( ) Seal Door - Leading Edge, Outboard Wing 1 114T0205-( ) (621AMB) (621AMB) (b) (a) (c) (d) (e) 114T2605-( ) Rib - OSS 464.475 Leading Edge Outboard Wing 2 114T2605-( ) (b) (a) Make the change in accordance with this service bulletin. (b) There is no equivalent Boeing part number for the changed part. Identify on the part that the change done in accordance with this service bulletin was made. (c) This is the part number after the change is done in accordance with this service bulletin. (d) This part is not used in production. (e) A production panel can be purchased from Boeing as an alternative to modifying the existing panel. 4. In Paragraph 3.B., Work Instructions: a. Part 1 is changed as follows: **Part 1 - Lower Wing Skin Change** (1) Change the leading edge lower wing skin panels below in accordance with the applicable figures below: **Right Wing Left Wing**  FIGURE 2 621AB FIGURE 1 521AB FIGURE 4 621EB FIGURE 3 521EB
**NOTE:**The leading edge lower wing skin panels in the table below can be purchased from Boeing with the changes already incorporated by this service bulletin. See the table below for applicable part numbers. **Right Wing Left Wing**  114T2400-840 621AB 114T2400-839 521AB 654T0513-1302 621EB 654T0513-1301 521EB (2) Change the seal door at OSS 424.097 in accordance with the figures below:

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: October 07, 2010 767-57-0121 Revision 2: January 10, 2012 8 of 10 **BOEING SERVICE BULLETIN 767-57-0121 Right Wing**  **Left Wing** FIGURE 6 FIGURE 5
**NOTE:**The seal doors in the table below can be purchased from Boeing with the changes already incorporated by this service bulletin. See the table below for applicable part numbers. **Right Wing Left Wing**  114T0205-124 114T0205-123 5. In FIGURE 1: LEFT WING SKIN PANEL 521AB CHANGE, the step table is changed to add Step 7 as follows:
**MORE DATA QTY**  **IDENTIFICATION NAME**  **TASK STEP**  Apply rubber stamp to identify that this service bulletin was done. Refer to SOPM 20-50-10 asan accepted procedure. (Not shown) 1 521AB Skin Panel Identify 7

6. In FIGURE 2: RIGHT WING SKIN PANEL 621AB CHANGE, the step table is changed to add Step 7 as follows:
**MORE DATA QTY**  **IDENTIFICATION NAME**  **TASK STEP**  Apply rubber stamp to identify that this service bulletin was done. Refer to SOPM 20-50-10 asan accepted procedure. (Not shown) 1 621AB Skin Panel Identify 7

7. In FIGURE 5: LEFT WING SEAL DOOR CHANGE AT OSS 424.097, the step table is changed to add Step 7 as follows:
**MORE DATA QTY**  **IDENTIFICATION NAME**  **TASK STEP**  Apply rubber stamp to identify that this service bulletin was done. Refer to SOPM 20-50-10 asan accepted procedure. (Not shown) 1 521AMB Seal Door Identify 7

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: October 07, 2010 767-57-0121 Revision 2: January 10, 2012 9 of 10 **BOEING SERVICE BULLETIN 767-57-0121**8. In FIGURE 6: RIGHT WING SEAL DOOR CHANGE AT OSS 424.097, the step table is changed to add Step 7 as follows:
**MORE DATA QTY**  **IDENTIFICATION NAME**  **TASK STEP**  Apply rubber stamp to identify that this service bulletin was done. Refer to SOPM 20-50-10 asan accepted procedure. (Not shown) 1 621AMB Seal Door Identify 7

9. In FIGURE 7: LEFT WING RIB CHANGE AT OSS 464.475, the step table is changed to add Step 13 as follows:
**MORE DATA QTY**  **IDENTIFICATION NAME**  **TASK STEP**  Apply rubber stamp to identify that this service bulletin was done. Refer to SOPM 20-50-10 asan accepted procedure. (Not shown) - - Rib Identify 13

10. In FIGURE 8: RIGHT WING RIB CHANGE AT OSS 464.475, the step table is changed to add Step 13 as follows:
**MORE DATA QTY**  **IDENTIFICATION NAME**  **TASK STEP**  Apply rubber stamp to identify that this service bulletin was done. Refer to SOPM 20-50-10 asan accepted procedure. (Not shown) - - Rib Identify 13

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: October 07, 2010 767-57-0121 Revision 2: January 10, 2012 10 of 10 **BOEING SERVICE BULLETIN 767-57-0121**