### Commercial **Airplanes** 

# 767 Service Bulletin **ALERT Number: 767-27A0227**  Original Issue: February 12, 2013 ATA System: 2751 **SUBJECT:** FLIGHT CONTROLS - Flaps - Outboard Flap Actuator Crank Arm Mechanism - Flap Positions 1, 2, 7 and 8 Bearing Inspection/Replacement Export of this technology is controlled under the United States Export Administration Regulations (EAR) (15 CFR 300-774). 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 © 2013 Boeing. Unpublished Work. All Rights Reserved. Treatment of this document and its content is governed by contract with Boeing. Rights to use this document are licensed on a per aircraft basis and such rights may not be transferable. For more information, contact The Boeing Company. Boeing, the Boeing signature, the Boeing symbol, 707, 717, 727, 737, 747, 757, 767, 777, 787, DreamlinerTM, 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 Boeing liveries 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 is a trademark of Boeing Management Company.

Original Issue: February 12, 2013 767-27A0227 1 of 78 4.0Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: February 12, 2013 767-27A0227 2 of 78 **BOEING SERVICE BULLETIN 767-27A0227 ALERT**  **ALERT**

BLANK PAGE**Table of Contents** Summary...................................................... 5 1. PLANNING INFORMATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 A. Effectivity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 1. Airplanes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 2. Spares Affected. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 B. Concurrent Requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 C. Reason. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 D. Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 E. Compliance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 F. Approval. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 G. Manpower. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 H. Weight and Balance Changes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 I. Electrical Load Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 J. References. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 1. Existing Data:. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 2. Data Supplied with this Service Bulletin:. . . . . . . . . . . . . . . . . . . . . . . . . . . 29 3. Installation Drawings Used in the Preparation of this Service Bulletin:. . . . . . . . . . . 29 K. Publications Affected. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 L. Interchangeability and Intermixability of Parts. . . . . . . . . . . . . . . . . . . . . . . . . . . 30 M. Software Accomplishment Summary. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 2. MATERIAL INFORMATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 A. Material - Price and Availability. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 B. Industry Support Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 C. Parts Necessary for Each Airplane. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 1. Kits/Parts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 2. Parts and Materials Supplied by the Operator. . . . . . . . . . . . . . . . . . . . . . . . 32 3. Parts Modified and Reidentified. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 4. Parts Removed and Not Replaced. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 D. Parts Necessary to Change Spares. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 E. Special Tooling - Price and Availability. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 F. Special Tooling Necessary to do this Service Bulletin. . . . . . . . . . . . . . . . . . . . . . . 35 3. ACCOMPLISHMENT INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 A. GENERAL INFORMATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 B. WORK INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 FIGURE 1: INSPECT THE TRAILING EDGE FLAP SUPPORT BEARINGS AT THE TE FLAP SUPPORT RIB ASSEMBLY IN FLAP POSITIONS 1, 2, 7, AND 8, OUTBOARD SIDE [Group 1-3, Configuration 2]. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52 FIGURE 2: INSPECT THE TRAILING EDGE FLAP SUPPORT BEARINGS AT THE TE FLAP SUPPORT RIB ASSEMBLY IN FLAP POSITIONS 1, 2, 7, AND 8, INBOARD SIDE [Group 1-3, Configuration 2] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55 FIGURE 3: RESTORE THE TRAILING EDGE FLAP SUPPORT BEARINGS AT THE TE FLAP SUPPORT RIB ASSEMBLY IN FLAP POSITIONS 1, 2, 7, AND 8, OUTBOARD SIDE [Group 1-3, Configuration 2]. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58 FIGURE 4: RESTORE THE TRAILING EDGE FLAP SUPPORT BEARINGS AT THE TE FLAP SUPPORT RIB ASSEMBLY IN FLAP POSITIONS 1, 2, 7, AND 8, INBOARD SIDE [Group 1-3, Configuration 2] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: February 12, 2013 767-27A0227 3 of 78 **BOEING SERVICE BULLETIN 767-27A0227 ALERT**  **ALERT**FIGURE 5: REPLACE THE TRAILING EDGE FLAP SUPPORT BEARINGS AT THE TE FLAP SUPPORT RIB ASSEMBLY IN FLAP POSITION 1 [Group 1-3, Configuration 2]. . . . . . . . . . . . 63 FIGURE 6: REPLACE THE TRAILING EDGE FLAP SUPPORT BEARINGS AT THE TE FLAP SUPPORT RIB ASSEMBLY IN FLAP POSITION 2 [Group 1-3, Configuration 2]. . . . . . . . . . . . 66 FIGURE 7: REPLACE THE TRAILING EDGE FLAP SUPPORT BEARINGS AT THE TE FLAP SUPPORT RIB ASSEMBLY IN FLAP POSITION 7 [Group 1-3, Configuration 2]. . . . . . . . . . . . 69 FIGURE 8: REPLACE THE TRAILING EDGE FLAP SUPPORT BEARINGS AT THE TE FLAP SUPPORT RIB ASSEMBLY IN FLAP POSITION 8 [Group 1-3, Configuration 2]. . . . . . . . . . . . 72 FIGURE 9: RE-IDENTIFY THE TRAILING EDGE (TE) FLAP SUPPORT RIB ASSEMBLY FOR APPLICABLE FLAP POSITIONS WITH CORRECT NEW PART NUMBERS [Group 1, 3, Configuration 1] . 75 APPENDIX A: BEARING DAMAGE DEFINITIONS AND SUGGESTED WORKSHEET TO RECORD THE CONDITION OF THE REMOVED BEARINGS [Group 1-3, Configuration 2]. . . . . . . . 76

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: February 12, 2013 767-27A0227 4 of 78 **BOEING SERVICE BULLETIN 767-27A0227 ALERT**  **ALERT**

### Commercial **Airplanes** 

# 767 Service Bulletin **ALERT Summary**  **Number: 767-27A0227** Original Issue: February 12, 2013 ATA System: 2751 **SUBJECT:** FLIGHT CONTROLS - Flaps - Outboard Flap Actuator Crank Arm Mechanism - Flap Positions 1, 2, 7 and 8 Bearing Inspection/Replacement
THIS BULLETIN IS SENT TO THE OPERATORS OF RECORD OF THE AIRPLANES SHOWN IN PARAGRAPH 1.A., EFFECTIVITY. IF AN AIRPLANE HAS BEEN LEASED OR SOLD, SEND THIS SERVICE BULLETIN TO THE NEW OPERATOR. IF APPLICABLE SPARES HAVE BEEN SOLD, SEND THIS SERVICE BULLETIN TO THE NEW OWNER. **CONCURRENT REQUIREMENTS**
None. **BACKGROUND** Accomplishment of this service bulletin will replace the Trailing Edge (TE) Flap support bearings without a roller retention feature at the TE Flap support rib assembly in Flap Positions 1, 2, 7, and 8 with new bearings with a roller retention feature. The TE Flap support bearings are integral components of the TE Flap support rib assemblies. The TE Flap rotary actuators and position transmitters are attached to the TE support rib assemblies along the rear spar. Not replacing the TE Flap support bearings can, in the event of an undetected bearing failure, lead to damage to the TE rotary actuators and other TE Flap support rib parts, which could result in a dual Flap drive system disconnect in both TE Flap rotary actuators, and a possible Flaps blowback with loss of controllability of the airplane. There have been several cases of varying degrees of TE Flap support bearings damage at the TE Flap support rib assemblies in Flap Positions 1, 2, 4, 5, 7, and 8. An operator reported "TE FLAP ASYM" and "TE SHUT DOWN" messages at Flap 5 during a landing approach. Bearing damage was found at the Outboard E Flap support rib assembly in Flap Positions 1, 2, 7, and 8, and at the Inboard TE Flap support rib assembly in Positions 4 and 5. The inspection of a second airplane revealed similar TE Flap support bearing damage, but no EICAS messages were experienced in that case. A third airplane was inspected by another operator, and similar damage to the TE Flap support bearings was found, but no EICAS messages were experienced in that case either. Another operator found a broken position transmitter gearbox on a fourth airplane after receiving a Flap skew message. This airplane also had TE Flap support bearing damage in the TE Flap support rib assembly at various TE Flap Positions. Bearing damage in the TE Flaps support rib assembly is caused by the use of dead-blow mallets during the installation of the shaft on the TE Flap support rib assembly when TE Flap support bearings without a roller retention feature are installed. This method of installation may compromise bearings without a roller retention feature. The TE Flap support bearings in TE Flap Positions 3 and 6 are not affected.

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: February 12, 2013 767-27A0227 5 of 78This service bulletin replaces Boeing service bulletin 767-27A0222, Original Issue. More work is necessary for Group 1, Configuration 1 airplanes (airplanes that accomplished the terminating action given in Boeing service bulletin 767-27A0222, Original Issue) to maintain part number configuration control of the flap support rib assemblies. For these airplanes, the new part numbers for TE Flap support rib assembly in Flap Positions 1 and 8 were incorrect in 767-27A0222, Original Issue. The TE Flap support rib assembly part numbers should be changed to the correct part number on the affected airplanes in this group/configuration. No more work is necessary for Group 2, Configuration 1 airplanes. For this airplane, the new part numbers for TE Flap support rib assembly in Flap Positions 1 and 8 were correct in 767-27A0222, Original Issue. This service bulletin does not provide instructions to inspect/replace the TE Flap support bearings and the rotary actuators at Flap Positions 4 and 5. The TE Flap support bearings and TE rotary actuators at these Flap Positions are covered by service bulletin 767-27-0223. The TE Flap support bearings and TE rotary actuators at Flap Positions 3 and 6 are not affected by the condition addressed in this service bulletin Boeing Service Related Problem (SRP) 767-SRP-57-0235 and SRP 767-SRP-57-0255 are related to this service bulletin. This table is provided to operators for planning purposes only. Refer to the applicable sections for more information.
**Reference Affected**  **Planning Data** Paragraph 1.A.2., Spares Affected Yes Spares Affected Paragraph 1.E., Compliance and Paragraph 1.F., Approval Yes AD Related Paragraph 1.H., Weight and Balance Changes No Weight and Balance Change Paragraph 1.I., Electrical Load Data No Electrical Load Changed Paragraph 1.K., Publications Affected Yes Publications Affected Paragraph 1.K., Publications Affected No Airplane Flight Operations Affected (Flight Crew Operations Manual or FAA Approved Airplane Flight Manual) Paragraph 2.C.1., Kits/Parts Yes Kits/Parts Required Paragraph 2.C.2., Parts and Materials Supplied by the Operator Yes Operator Supplied Parts/Material Paragraph 2.F., Special Tooling Necessary to do this Service Bulletin No Special Tooling Required

**ACTION Group 1, 3, Configuration 1:**  **RE-IDENTIFY THE TRAILING EDGE (TE) FLAP SUPPORT RIB ASSEMBLY FOR APPLICABLE FLAP POSITIONS WITH CORRECT NEW PART NUMBERS**  1. Do PART 3 to reidentify the TE Flap support rib assembly at the applicable Flap Positions with the correct new part numbers.

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: February 12, 2013 767-27A0227 6 of 78 **BOEING SERVICE BULLETIN 767-27A0227 ALERT**  **ALERT Group 2, Configuration 1:**  1. No action required. **Group 1-3, Configuration 2: INSPECT THE TE FLAP SUPPORT BEARINGS AT THE TE FLAP SUPPORT RIB ASSEMBLY IN FLAP**  **POSITIONS 1, 2, 7, AND 8:** 1. Do PART 1A to do a General Visual Inspection (GVI) of the TE Flap support bearings at the TE Flap support rib assembly in Flap Positions 1, 2, 7, and 8 to identify the type of bearing installed. a. PART 1A, STEP 7, CONDITION 1: Two bearings with a roller retention feature are installed at the TE Flap support rib assembly in Flap Positions 1, 2, 7, and 8. – No bearing replacement is required. Put the airplane back to a serviceable condition in accordance with Accomplishment Instructions PART 1B. a. PART 1A, STEP 7, CONDITION 2: At least one bearing without a roller retention feature is installed at the TE Flap support rib assembly in Flap Position1, 2, 7, or 8. – Replace the two bearings at each applicable TE Flap support rib in accordance with Accomplishment Instructions PART 2. – Do a General Visual Inspection (GVI) of each pair of bearings removed in accordance with Accomplishment Instructions PART 2, Step 1.d. **Group 1-3, Configuration 2: REPLACE THE TRAILING EDGE (TE) FLAP SUPPORT BEARINGS AT THE TE FLAP SUPPORT RIB**  **ASSEMBLY IN FLAP POSITIONS 1, 2, 7, or 8:** 1. Do PART 2 to replace the applicable TE Flap support bearings at the TE Flap support rib assembly in Flap Positions 1, 2, 7, or 8 after bearing the inspection in PART 1A if one or more bearings, at any of the applicable TE Flap Positions, do not have a roller retention feature. 2. Do a GVI of the removed TE Flap support bearings and record the damage / type bearing combination. Use the data to find if the TE rotary actuators at Flap Positions 1, 2, 7, or 8 are serviceable or if they need to be overhauled or replaced. a. PART 2, STEP 1.f, 2.f, 3.f, or 4.f., CONDITION 1: Both TE Flap support bearings at TE Flap support rib assembly in Flap Position 1 have at least one face each that meets the definitions of good or slightly damaged bearing face. – PART 2, Step 1.f, CONDITION 1, Step 1: The TE rotary actuator is acceptable and may be used as-is in the applicable Flap Position(s). b. PART 2, STEP 1.f, 2.f, 3.f, or 4.f., CONDITION 2: Only one TE Flap support bearing at the TE Flap support rib assembly in Flap Position 1 has at least one face that meets the definition of good or slightly damaged bearing face. The other bearing at the same TE Flap support rib assembly has faces that meet the definitions of moderately damaged or fractured bearing face. – PART 2, Step 1.f, CONDITION 2, Step 1: Overhaul or replace the TE rotary actuator at the TE Flap support rib assembly in the applicable Flap Position(s).

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: February 12, 2013 767-27A0227 7 of 78 **BOEING SERVICE BULLETIN 767-27A0227 ALERT**  **ALERT**c. PART 2, STEP 1.f, 2.f, 3.f, or 4.f., CONDITION 3: Both bearings at the TE Flap support rib assembly in Flap Position 1 have all faces that meet the definitions of moderately damaged or fractured bearing face. – PART 2, Step 1.f, CONDITION 3, Step 1: Replace the TE rotary actuator at the TE Flap support rib assembly in the applicable Flap Position(s). **Group 1-3, Configuration 2: FUNCTIONAL TEST AFTER BEARING REPLACEMENT:**  1. Do the functional test after the TE Flap rib support bearings have been replaced at Flap Position 1, 2, 7 or 8. **EFFECTIVITY** 767-200/-300/-300F/-400ER Airplanes that have bearings without a roller retention feature installed at the Trailing Edge (TE) Flap support ribs. Refer to Paragraph 1.A.1., Airplanes, for the list of affected airplanes. **COMPLIANCE** The Federal Aviation Administration (FAA) will possibly release an Airworthiness Directive related to this service bulletin. The Airworthiness Directive will make the compliance tasks and times given in this service bulletin mandatory. Refer to Paragraph 1.E., Compliance. **INDUSTRY SUPPORT INFORMATION** Boeing warranty remedies are available for airplanes in warranty as of July 15, 2009. Please refer to Paragraph 2.B., Industry Support Information.
**MANPOWER** Refer to Paragraph 1.G., Manpower.
**MATERIAL INFORMATION** Boeing Supplied Kits/Parts. Refer to Paragraph 2.A., Material - Price and Availability.

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: February 12, 2013 767-27A0227 8 of 78 **BOEING SERVICE BULLETIN 767-27A0227 ALERT**  **ALERT**Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: February 12, 2013 767-27A0227 9 of 78 **BOEING SERVICE BULLETIN 767-27A0227 ALERT**  **ALERT**Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: February 12, 2013 767-27A0227 10 of 78 **BOEING SERVICE BULLETIN 767-27A0227 ALERT**  **ALERT**

BLANK PAGE

### Commercial **Airplanes** 

# 767 Service Bulletin **ALERT Number: 767-27A0227**  Original Issue: February 12, 2013 ATA System: 2751 **SUBJECT:** FLIGHT CONTROLS - Flaps - Outboard Flap Actuator Crank Arm Mechanism - Flap Positions 1, 2, 7 and 8 Bearing Inspection/Replacement
THIS BULLETIN IS SENT TO THE OPERATORS OF RECORD OF THE AIRPLANES SHOWN IN PARAGRAPH 1.A., EFFECTIVITY. IF AN AIRPLANE HAS BEEN LEASED OR SOLD, SEND THIS SERVICE BULLETIN TO THE NEW OPERATOR. IF APPLICABLE SPARES HAVE BEEN SOLD, SEND THIS SERVICE BULLETIN TO THE NEW OWNER.
**1. PLANNING INFORMATION A. Effectivity**  1. Airplanes This service bulletin is for the airplane(s) shown below. Refer to Service Bulletin Index D624T001 Part 3 for Airplane Variable Number, Line Number, and Serial Number data.
**DESCRIPTION CONFIGURATION**  **GROUP** 767-200/300/300F/400ER Airplanes Line Number 949 - 981

- 1 Airplanes that accomplished the terminating action in Boeing service bulletin 767-27A0222, Original Issue, but need to repart mark the TE Flap support rib assembly in Flap Positions 1 and 8 1

Airplanes that did not accomplish the terminating action in Boeing service bulletin 767-27A0222, Original Issue 2
767-300F Airplane Line Number 982

- 2 Airplanes that accomplished the terminating action in Boeing service bulletin 767-27A0222, Original Issue 1
Airplanes that did not accomplished the terminating action in Boeing service bulletin 767-27A0222, Original Issue 2

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: February 12, 2013 767-27A0227 11 of 78**DESCRIPTION CONFIGURATION**  **GROUP** 767-300/300F/400ER Airplanes Line Number 740-810

- 3 Airplanes that replaced the Trailing Edge Flap support bearings with bearings with a retention feature, but need to repart mark the TE Flap support rib assembly in Flap Positions 1, 2, 7 and 8 1

Airplanes that have not inspected/replaced the Trailing Edge Flap support bearings with bearings with a retention feature 2

Airplane Models: 767-200, 767-300, 767-300F, 767-400ER **Group Variable Number**  3 VQ001 - VQ009 3 VQ071 - VQ073 1 VQ111 1 VR089 1 VR108 - VR109 3 VR207 - VR209 3 VR256 - VR257 1 VR266 3 VR422 3 VR441 3 VR472 3 VS055 - VS056 3 VS076 - VS078 3 VS095 - VS102 3 VS112 - VS113 3 VS137 3 VS201 - VS203 3 VS208 3 VS216 - VS217 3 VS270 - VS274 3 VS291 3 VS302

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: February 12, 2013 767-27A0227 12 of 78 **BOEING SERVICE BULLETIN 767-27A0227 ALERT**  **ALERT Group**  **Variable Number** 3 VS307 3 VS316 3 VS321 - VS324 3 VS366 - VS367 3 VS381 - VS382 3 VS391 - VS392 3 VS401 3 VS466 - VS470 3 VS486 3 VS496 3 VS506 - VS507 1 VS716 - VS720 1 VS733 - VS736 1 VS904 - VS910 1 VS912 1 VS916 1 VS921 - VS922 1 VS931 - VS933 1 VT531 - VT533 1 VT541 - VT542 2 VT543 2. Spares Affected Examine your spares supply for the parts or components identified in Paragraph 2.C., Parts Necessary for Each Airplane. If any parts or components are found, refer to Paragraph 2.C. for the recommended use. **B. Concurrent Requirements**
None.

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: February 12, 2013 767-27A0227 13 of 78 **BOEING SERVICE BULLETIN 767-27A0227 ALERT**  **ALERT C. Reason**  Accomplishment of this service bulletin will replace the Trailing Edge (TE) Flap support bearings without a roller retention feature at the TE Flap support rib assembly in Flap Positions 1, 2, 7, and 8 with new bearings with a roller retention feature. The TE Flap support bearings are integral components of the TE Flap support rib assemblies. The TE Flap rotary actuators and position transmitters are attached to the TE support rib assemblies along the rear spar. Not replacing the TE Flap support bearings can, in the event of an undetected bearing failure, lead to damage to the TE rotary actuators and other TE Flap support rib parts, which could result in a dual Flap drive system disconnect in both TE Flap rotary actuators, and a possible Flaps blowback with loss of controllability of the airplane. There have been several cases of varying degrees of TE Flap support bearings damage at the TE Flap support rib assemblies in Flap Positions 1, 2, 4, 5, 7, and 8. An operator reported "TE FLAP ASYM" and "TE SHUT DOWN" messages at Flap 5 during a landing approach. Bearing damage was found at the Outboard E Flap support rib assembly in Flap Positions 1, 2, 7, and 8, and at the Inboard TE Flap support rib assembly in Positions 4 and 5. The inspection of a second airplane revealed similar TE Flap support bearing damage, but no EICAS messages were experienced in that case. A third airplane was inspected by another operator, and similar damage to the TE Flap support bearings was found, but no EICAS messages were experienced in that case either. Another operator found a broken position transmitter gearbox on a fourth airplane after receiving a Flap skew message. This airplane also had TE Flap support bearing damage in the TE Flap support rib assembly at various TE Flap Positions. Bearing damage in the TE Flaps support rib assembly is caused by the use of dead-blow mallets during the installation of the shaft on the TE Flap support rib assembly when TE Flap support bearings without a roller retention feature are installed. This method of installation may compromise bearings without a roller retention feature. The TE Flap support bearings in TE Flap Positions 3 and 6 are not affected. This service bulletin replaces Boeing service bulletin 767-27A0222, Original Issue. More work is necessary for Group 1, Configuration 1 airplanes (airplanes that accomplished the terminating action given in Boeing service bulletin 767-27A0222, Original Issue) to maintain part number configuration control of the flap support rib assemblies. For these airplanes, the new part numbers for TE Flap support rib assembly in Flap Positions 1 and 8 were incorrect in 767-27A0222, Original Issue. The TE Flap support rib assembly part numbers should be changed to the correct part number on the affected airplanes in this group/configuration. No more work is necessary for Group 2, Configuration 1 airplanes. For this airplane, the new part numbers for TE Flap support rib assembly in Flap Positions 1 and 8 were correct in 767-27A0222, Original Issue. This service bulletin does not provide instructions to inspect/replace the TE Flap support bearings and the rotary actuators at Flap Positions 4 and 5. The TE Flap support bearings and TE rotary actuators at these Flap Positions are covered by service bulletin 767-27-0223. The TE Flap support bearings and TE rotary actuators at Flap Positions 3 and 6 are not affected by the condition addressed in this service bulletin Boeing Service Related Problem (SRP) 767-SRP-57-0235 and SRP 767-SRP-57-0255 are related to this service bulletin.

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: February 12, 2013 767-27A0227 14 of 78 **BOEING SERVICE BULLETIN 767-27A0227 ALERT**  **ALERT D. Description**  **Group 1, 3, Configuration 1: RE-IDENTIFY THE TRAILING EDGE (TE) FLAP SUPPORT RIB ASSEMBLY FOR APPLICABLE**  **FLAP POSITIONS WITH CORRECT NEW PART NUMBERS** 1. Do PART 3 to reidentify the TE Flap support rib assembly at the applicable Flap Positions with the correct new part numbers. **Group 2, Configuration 1:** 1. No action required. **Group 1-3, Configuration 2: INSPECT THE TE FLAP SUPPORT BEARINGS AT THE TE FLAP SUPPORT RIB ASSEMBLY IN**  **FLAP POSITIONS 1, 2, 7, AND 8:** 1. Do PART 1A to do a General Visual Inspection (GVI) of the TE Flap support bearings at the TE Flap support rib assembly in Flap Positions 1, 2, 7, and 8 to identify the type of bearing installed. a. PART 1A, STEP 7, CONDITION 1: Two bearings with a roller retention feature are installed at the TE Flap support rib assembly in Flap Positions 1, 2, 7, and 8. – No bearing replacement is required. Put the airplane back to a serviceable condition in accordance with Accomplishment Instructions PART 1B. a. PART 1A, STEP 7, CONDITION 2: At least one bearing without a roller retention feature is installed at the TE Flap support rib assembly in Flap Position1, 2, 7, or 8. – Replace the two bearings at each applicable TE Flap support rib in accordance with Accomplishment Instructions PART 2. – Do a General Visual Inspection (GVI) of each pair of bearings removed in accordance with Accomplishment Instructions PART 2, Step 1.d. **Group 1-3, Configuration 2: REPLACE THE TRAILING EDGE (TE) FLAP SUPPORT BEARINGS AT THE TE FLAP SUPPORT**  **RIB ASSEMBLY IN FLAP POSITIONS 1, 2, 7, or 8:** 1. Do PART 2 to replace the applicable TE Flap support bearings at the TE Flap support rib assembly in Flap Positions 1, 2, 7, or 8 after bearing the inspection in PART 1A if one or more bearings, at any of the applicable TE Flap Positions, do not have a roller retention feature. 2. Do a GVI of the removed TE Flap support bearings and record the damage / type bearing combination. Use the data to find if the TE rotary actuators at Flap Positions 1, 2, 7, or 8 are serviceable or if they need to be overhauled or replaced. a. PART 2, STEP 1.f, 2.f, 3.f, or 4.f., CONDITION 1: Both TE Flap support bearings at TE Flap support rib assembly in Flap Position 1 have at least one face each that meets the definitions of good or slightly damaged bearing face. – PART 2, Step 1.f, CONDITION 1, Step 1: The TE rotary actuator is acceptable and may be used as-is in the applicable Flap Position(s).

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: February 12, 2013 767-27A0227 15 of 78 **BOEING SERVICE BULLETIN 767-27A0227 ALERT**  **ALERT**b. PART 2, STEP 1.f, 2.f, 3.f, or 4.f., CONDITION 2: Only one TE Flap support bearing at the TE Flap support rib assembly in Flap Position 1 has at least one face that meets the definition of good or slightly damaged bearing face. The other bearing at the same TE Flap support rib assembly has faces that meet the definitions of moderately damaged or fractured bearing face. – PART 2, Step 1.f, CONDITION 2, Step 1: Overhaul or replace the TE rotary actuator at the TE Flap support rib assembly in the applicable Flap Position(s). c. PART 2, STEP 1.f, 2.f, 3.f, or 4.f., CONDITION 3: Both bearings at the TE Flap support rib assembly in Flap Position 1 have all faces that meet the definitions of moderately damaged or fractured bearing face. – PART 2, Step 1.f, CONDITION 3, Step 1: Replace the TE rotary actuator at the TE Flap support rib assembly in the applicable Flap Position(s). **Group 1-3, Configuration 2: FUNCTIONAL TEST AFTER BEARING REPLACEMENT:**  1. Do the functional test after the TE Flap rib support bearings have been replaced at Flap Position 1, 2, 7 or 8. The work in this service bulletin is done in the maintenance zone(s) given below. **Group 1:**
**Affected Maintenance Zones Zone**  **Model** 566, 666 767-200, 767-300, 767-300F, 767-400ER **Group 2:**
**Affected Maintenance Zones Zone**  **Model** 566, 666 767-300F **Group 3:**
**Affected Maintenance Zones Zone**  **Model** 566, 666 767-300, 767-300F, 767-400ER **E. Compliance** The Federal Aviation Administration (FAA) will possibly release an Airworthiness Directive related to this service bulletin. The Airworthiness Directive will make the compliance tasks and times given in this service bulletin mandatory.

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: February 12, 2013 767-27A0227 16 of 78 **BOEING SERVICE BULLETIN 767-27A0227 ALERT**  **ALERT Group 1, 3, Configuration 1:**  No compliance time given. **Group 2, Configuration 1:** No further action required. **Group 1-2, Configuration 2: Table 1: Inspect and Replace the TE Flap Support Rib Bearings at the Flap Support Rib Assembly in**  **Flap Positions 1, 2, 7 and 8. Repeat Inter** **val (Not to Ex ceed)**  **Compliance Time (Whichever Occurs Later)**  **Action Condition** 

- Within 500 flight cycles after the original issuedate of this Service BulletinBefore 6,000 total flight cyclesDo a General Visual Inspection (GVI) of both bearings at the TE flap support rib assembly in Flap Positions 1, 2, 7, and8 to determine if the bearings have a roller retention feature in accordance withAccomplishment Instructions PART 1A All airplanes

- - No bearing replacement is required. Put the airplaneback to a serviceable condition in accordance withAccomplishment Instructions PART 1BPART 1A, STEP 4, CONDITION 1 - Two bearingswith a roller retention feature are installed at the TE Flap support rib assembly in Flap Positions 1, 2, 7, and 8

- Before further flight - Replace the two bearings at each applicable TE Flap support rib in accordancewith Accomplishment Instructions PART 2PART 1A, STEP 4, CONDITION 2 - At least onebearing without a roller retention feature is installed at the TE Flap support rib assembly in Flap Position 1, 2, 7, or 8 - Do a General Visual Inspection (GVI) of each pairof bearings removed in accordance with Accomplishment Instructions PART 2, Step 1.d.

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: February 12, 2013 767-27A0227 17 of 78 **BOEING SERVICE BULLETIN 767-27A0227 ALERT**  **ALERT Group 1-2, Configuration 2:**  **Table 1: Inspect and Replace the TE Flap Support Rib Bearings at the Flap Support Rib Assembly in Flap Positions 1, 2, 7 and 8.**  **Repeat Inter val (Not to Ex**  **ceed) Compliance Time (Whichever**  **Occurs Later) Action**  **Condition**

- - The TE rotary actuator is acceptable and may be used as-is in the applicable Flap Position(s) where CONDITION 1 is found:PART 2, STEP 1.e, CONDITION 1 - Both TE Flap support bearings at TE Flap support rib assembly in Flap Position 1 have at least one face each that meets the definitions of good or slightly damaged bearing face - Flap Position 1 - In accordance with Accomplishment Instructions PART 2, Step 1.e, CONDITION 1, Step 1 Or - Flap Position 2 - In accordance with Accomplishment Instructions PART 2, Step 2.e, CONDITION 1, Step 1PART 2, STEP 2.e, CONDITION 1 - Both TE Flap support bearings at TE Flap support rib assembly in Flap Position 2 have at least one face each that meets the definitions of good or slightly damaged bearing face - Flap Position 7 - In accordance with Accomplishment Instructions PART 2, Step 3.e, CONDITION 1, Step 1 Or - Flap Position 8 - In accordance with Accomplishment Instructions PART 2, Step 4.e, CONDITION 1, Step 1PART 2, STEP 3.e, CONDITION 1 - Both TE Flap support bearings at TE Flap support rib assembly in Flap Position 7 have at least one face each that meets the definitions of good or slightly damaged bearing face OrPART 2, STEP 4.e, CONDITION 1 - Both TE Flap support bearings at TE Flap support rib assembly in Flap Position 8 have at least one face each that meets the definitions of good or slightly damaged bearing face

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: February 12, 2013 767-27A0227 18 of 78 **BOEING SERVICE BULLETIN 767-27A0227 ALERT**  **ALERT Group 1-2, Configuration 2:**  **Table 1: Inspect and Replace the TE Flap Support Rib Bearings at the Flap Support Rib Assembly in Flap Positions 1, 2, 7 and 8.**  **Repeat Inter val (Not to Ex**  **ceed) Compliance Time (Whichever**  **Occurs Later) Action**  **Condition**

- Before further flight Overhaul or replace the TE rotary actuator at the TE Flap support rib assemblyin the applicable Flap Position(s) where CONDITION 2 is found:PART 2, STEP 1.e, CONDITION 2 - Only one TE Flap support bearing at theTE Flap support rib assembly in Flap Position 1 has at least one face that meets the definition of good or slightly damaged bearing face. The other bearing at the same TE Flap support rib assembly has faces that meet the definitions of moderately damaged or fractured bearing face - Flap Position 1 - In accordance with Accomplishment Instructions PART 2, Step 1.e, CONDITION 2,Step 1, OPTION 1 or OPTION 2- Flap Position 2 - In accordance with Accomplishment Instructions PART 2, Step 2.e, CONDITION 2,Step 1, OPTION 1 or OPTION 2 OrPART 2, STEP 2.e, CONDITION 2 - Only one TE Flap support bearing at theTE Flap support rib assembly in Flap Position 2 has at least one face that meets the definition of good or slightly damaged bearing face. The other bearing at the same TE Flap support rib assembly has faces that meet the definitions of moderately damaged or fractured bearing face - Flap Position 7 - In accordance with Accomplishment Instructions PART 2, Step 3.e, CONDITION 2,Step 1, OPTION 1 or OPTION 2- Flap Position 8 - In accordance with Accomplishment Instructions PART 2, Step 4.e, CONDITION 2,Step 1, OPTION 1 or OPTION 2 Or

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: February 12, 2013 767-27A0227 19 of 78 **BOEING SERVICE BULLETIN 767-27A0227 ALERT**  **ALERT Group 1-2, Configuration 2:**  **Table 1: Inspect and Replace the TE Flap Support Rib Bearings at the Flap Support Rib Assembly in Flap Positions 1, 2, 7 and 8.**  **Repeat Inter val (Not to Ex**  **ceed) Compliance Time (Whichever**  **Occurs Later) Action**  **Condition**

PART 2, STEP 3.e, CONDITION 2 - Only one TE Flap support bearing at theTE Flap support rib assembly in Flap Position 7 has at least one face that meets the definition of good or slightly damaged bearing face. The other bearing at the same TE Flap support rib assembly has faces that meet the definitions of moderately damaged or fractured bearing face OrPART 2, STEP 4.e, CONDITION 2 - Only one TE Flap support bearing at theTE Flap support rib assembly in Flap Position 8 has at least one face that meets the definition of good or slightly damaged bearing face. The other bearing at the same TE Flap support rib assembly has faces that meet the definitions of moderately damaged or fractured bearing face

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: February 12, 2013 767-27A0227 20 of 78 **BOEING SERVICE BULLETIN 767-27A0227 ALERT**  **ALERT Group 1-2, Configuration 2:**  **Table 1: Inspect and Replace the TE Flap Support Rib Bearings at the Flap Support Rib Assembly in Flap Positions 1, 2, 7 and 8.**  **Repeat Inter val (Not to Ex**  **ceed) Compliance Time (Whichever**  **Occurs Later) Action**  **Condition**

- Before further flight Replace the TE rotary actu- ator at the TE Flap supportrib assembly in the applicable Flap Position(s) where CONDITION 3 is found:PART 2, STEP 1.e, CONDITION 3 - Both bearings at the TE Flap support rib assembly in Flap Position 1 have all faces that meetthe definitions of moderately damaged or fractured bearing face - Flap Position 1 - In accordance with Accomplishment Instructions PART 2, Step 1.e, CONDITION 3, Step 1 OrPART 2, STEP 2.e, CONDITION 3 - Both bearings at the TE Flap support rib assembly in Flap Position 2 have all faces that meetthe definitions of moderately damaged or fractured bearing face - Flap Position 2 - In accordance with Accomplishment Instructions PART 2, Step 2.e, CONDITION 3, Step 1- Flap Position 7 - In accordance with Accomplishment Instructions PART 2, Step 3.e, CONDITION 3, Step 1 OrPART 2, STEP 3.e, CONDITION 3 - Both bearings at the TE Flap support rib assembly in Flap Position 7 have all faces that meetthe definitions of moderately damaged or fractured bearing face - Flap Position 8 - In accordance with Accomplishment Instructions PART 2, Step 4.e, CONDITION 3, Step 1 OrPART 2, STEP 4.e, CONDITION 3 - Both bearings at the TE Flap support rib assembly in Flap Position 8 have all faces that meetthe definitions of moderately damaged or fractured bearing face

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: February 12, 2013 767-27A0227 21 of 78 **BOEING SERVICE BULLETIN 767-27A0227 ALERT**  **ALERT Group 3, Configuration 2:**  **Table 2: Inspect and Replace the TE Flap Support Rib Bearings at the Flap Support Rib Assembly in Flap Positions 1, 2, 7 and 8.**  **Repeat Interval (not to Exceed)**  **Compliance Time**  **Action Condition** 

- Within 5,500 flight cycles after the original issuedate of this service bulletinDo a General Visual Inspection (GVI) of both bearings at the TE flap support rib assembly in Flap Positions 1, 2, 7, and8 to determine if the bearings have a roller retention feature in accordance withAccomplishment Instructions PART 1A. All airplanes

- - No bearing replacement is required. Put the airplaneback to a serviceable condition in accordance withAccomplishment Instructions PART 1BPART 1A, STEP 4, CONDITION 1 - Two bearingswith a roller retention feature are installed at the TE Flap support rib assembly in Flap Positions 1, 2, 7, and 8

- Before further flight - Replace the two bearings at each applicable TE Flap support rib in accordancewith Accomplishment Instructions PART 2PART 1A, STEP 4, CONDITION 2 - At least onebearing without a roller retention feature is installed at the TE Flap support rib assembly in Flap Position 1, 2, 7, or 8 - Do a General Visual Inspection (GVI) of each pairof bearings removed in accordance with Accomplishment Instructions PART 2, Step 1.d.

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: February 12, 2013 767-27A0227 22 of 78 **BOEING SERVICE BULLETIN 767-27A0227 ALERT**  **ALERT Group 3, Configuration 2:**  **Table 2: Inspect and Replace the TE Flap Support Rib Bearings at the Flap Support Rib Assembly in Flap Positions 1, 2, 7 and 8.**  **Repeat Interval (not to Exceed)**  **Compliance Time**  **Action Condition** 

- - The TE rotary actuator is acceptable and may be used as-is in the applicable Flap Position(s) where CONDITION 1 is found:PART 2, STEP 1.e, CONDITION 1 - Both TE Flap support bearings at TE Flap support rib assembly in Flap Position 1 have at least one face each that meets the definitions of good or slightly damaged bearing face - Flap Position 1 - In accordance with Accomplishment Instructions PART 2, Step 1.e, CONDITION 1, Step 1 Or - Flap Position 2 - In accordance with Accomplishment Instructions PART 2, Step 2.e, CONDITION 1, Step 1PART 2, STEP 2.e, CONDITION 1 - Both TE Flap support bearings at TE Flap support rib assembly in Flap Position 2 have at least one face each that meets the definitions of good or slightly damaged bearing face - Flap Position 7 - In accordance with Accomplishment Instructions PART 2, Step 3.e, CONDITION 1, Step 1 Or - Flap Position 8 - In accordance with Accomplishment Instructions PART 2, Step 4.e, CONDITION 1, Step 1PART 2, STEP 3.e, CONDITION 1 - Both TE Flap support bearings at TE Flap support rib assembly in Flap Position 7 have at least one face each that meets the definitions of good or slightly damaged bearing face OrPART 2, STEP 4.e, CONDITION 1 - Both TE Flap support bearings at TE Flap support rib assembly in Flap Position 8 have at least one face each that meets the definitions of good or slightly damaged bearing face

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: February 12, 2013 767-27A0227 23 of 78 **BOEING SERVICE BULLETIN 767-27A0227 ALERT**  **ALERT Group 3, Configuration 2:**  **Table 2: Inspect and Replace the TE Flap Support Rib Bearings at the Flap Support Rib Assembly in Flap Positions 1, 2, 7 and 8.**  **Repeat Interval (not to Exceed)**  **Compliance Time**  **Action Condition** 

- Before further flight Overhaul or replace the TE rotary actuator at the TE Flap support rib assemblyin the applicable Flap Position(s) where CONDITION 2 is found:PART 2, STEP 1.e, CONDITION 2 - Only one TE Flap support bearing at theTE Flap support rib assembly in Flap Position 1 has at least one face that meets the definition of good or slightly damaged bearing face. The other bearing at the same TE Flap support rib assembly has faces that meet the definitions of moderately damaged or fractured bearing face - Flap Position 1 - In accordance with Accomplishment Instructions PART 2, Step 1.e, CONDITION 2,Step 1, OPTION 1 or OPTION 2- Flap Position 2 - In accordance with Accomplishment Instructions PART 2, Step 2.e, CONDITION 2,Step 1, OPTION 1 or OPTION 2 OrPART 2, STEP 2.e, CONDITION 2 - Only one TE Flap support bearing at theTE Flap support rib assembly in Flap Position 2 has at least one face that meets the definition of good or slightly damaged bearing face. The other bearing at the same TE Flap support rib assembly has faces that meet the definitions of moderately damaged or fractured bearing face - Flap Position 7 - In accordance with Accomplishment Instructions PART 2, Step 3.e, CONDITION 2,Step 1, OPTION 1 or OPTION 2- Flap Position 8 - In accordance with Accomplishment Instructions PART 2, Step 4.e, CONDITION 2,Step 1, OPTION 1 or OPTION 2 Or

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: February 12, 2013 767-27A0227 24 of 78 **BOEING SERVICE BULLETIN 767-27A0227 ALERT**  **ALERT Group 3, Configuration 2:**  **Table 2: Inspect and Replace the TE Flap Support Rib Bearings at the Flap Support Rib Assembly in Flap Positions 1, 2, 7 and 8.**  **Repeat Interval (not to Exceed)**  **Compliance Time**  **Action Condition** 
PART 2, STEP 3.e, CONDITION 2 - Only one TE Flap support bearing at theTE Flap support rib assembly in Flap Position 7 has at least one face that meets the definition of good or slightly damaged bearing face. The other bearing at the same TE Flap support rib assembly has faces that meet the definitions of moderately damaged or fractured bearing face OrPART 2, STEP 4.e, CONDITION 2 - Only one TE Flap support bearing at theTE Flap support rib assembly in Flap Position 8 has at least one face that meets the definition of good or slightly damaged bearing face. The other bearing at the same TE Flap support rib assembly has faces that meet the definitions of moderately damaged or fractured bearing face

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: February 12, 2013 767-27A0227 25 of 78 **BOEING SERVICE BULLETIN 767-27A0227 ALERT**  **ALERT Group 3, Configuration 2:**  **Table 2: Inspect and Replace the TE Flap Support Rib Bearings at the Flap Support Rib Assembly in Flap Positions 1, 2, 7 and 8.**  **Repeat Interval (not to Exceed)**  **Compliance Time**  **Action Condition** 

- Before further flightReplace the TE rotary actuator at the TE Flap supportrib assembly in the applicable Flap Position(s) where CONDITION 3 is found:PART 2, STEP 1.e, CONDITION 3 - Both bearings at the TE Flap support rib assembly in Flap Position 1 have all faces that meetthe definitions of moderately damaged or fractured bearing face - Flap Position 1 - In accordance with Accomplishment Instructions PART 2, Step 1.e, CONDITION 3, Step 1 OrPART 2, STEP 2.e, CONDITION 3 - Both bearings at the TE Flap support rib assembly in Flap Position 2 have all faces that meetthe definitions of moderately damaged or fractured bearing face - Flap Position 2 - In accordance with Accomplishment Instructions PART 2, Step 2.e, CONDITION 3, Step 1- Flap Position 7 - In accordance with Accomplishment Instructions PART 2, Step 3.e, CONDITION 3, Step 1 OrPART 2, STEP 3.e, CONDITION 3 - Both bearings at the TE Flap support rib assembly in Flap Position 7 have all faces that meetthe definitions of moderately damaged or fractured bearing face - Flap Position 8 - In accordance with Accomplishment Instructions PART 2, Step 4.e, CONDITION 3, Step 1 OrPART 2, STEP 4.e, CONDITION 3 - Both bearings at the TE Flap support rib assembly in Flap Position 8 have all faces that meetthe definitions of moderately damaged or fractured bearing face **F. 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.

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: February 12, 2013 767-27A0227 26 of 78 **BOEING SERVICE BULLETIN 767-27A0227 ALERT**  **ALERT**If 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. **G. Manpower Group 1-3, Configuration 2:**  **Table 2: Inspection/Replacement of the TE Flap Support Rib Bearings at the TE Flap Support Rib Assembly in Flap Position 2** 
**Notes Elapsed Hours**  **Task-Hours Number of Persons**  **Task** 1.75 1.75 1 PREPARE 1.25 2.50 2 FIGURE 1 1.25 2.50 2 FIGURE 2 (a) 1.25 2.50 2 FIGURE 3 (a) 1.25 2.50 2 FIGURE 4 1.25 2.50 2 FIGURE 6 (b) 0.50 1.00 2 FUNCTIONAL TEST 8.50 12.75 Total per rib position (a) FIGURE 3 and FIGURE 4 are required only if the bearing inspection in FIGURE 1 and FIGURE 2 finds bearings with a roller retention feature.(b) FUNCTIONAL TEST is required only if bearings are replaced in any of the applicable Flap Positions (1, 2, 7 or 8). **Group 1-3, Configuration 2: Table 1: Inspection/Replacement of the TE Flap Support Rib Bearings at the TE Flap Support Rib**  **Assembly in Flap Position 1**
**Notes Elapsed Hours**  **Task-Hours Number of Persons**  **Task** 1.75 1.75 1 PREPARE 1.25 2.50 2 FIGURE 1 1.25 2.50 2 FIGURE 2 (a) 1.25 2.50 2 FIGURE 3 (a) 1.25 2.50 2 FIGURE 4 1.25 2.50 2 FIGURE 5 (b) 0.50 1.00 2 FUNCTIONAL TEST 8.50 12.75 Total per rib position (a) FIGURE 3 and FIGURE 4 are required only if the bearing inspection in FIGURE 1 and FIGURE 2 finds bearings with a roller retention feature.(b) FUNCTIONAL TEST is required only if bearings are replaced in any of the applicable Flap Positions (1, 2, 7 or 8).

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: February 12, 2013 767-27A0227 27 of 78 **BOEING SERVICE BULLETIN 767-27A0227 ALERT**  **ALERT Group 1-3, Configuration 2:**  **Table 3: Inspection/Replacement of the TE Flap Support Rib Bearings at the TE Flap Support Rib Assembly in Flap Position 7** 
**Notes Elapsed Hours**  **Task-Hours Number of Persons**  **Task** 1.75 1.75 1 PREPARE 1.25 2.50 2 FIGURE 1 1.25 2.50 2 FIGURE 2 (a) 1.25 2.50 2 FIGURE 3 (a) 1.25 2.50 2 FIGURE 4 1.25 2.50 2 FIGURE 7 (b) 0.50 1.00 2 FUNCTIONAL TEST 8.50 12.75 Total per rib position (a) FIGURE 3 and FIGURE 4 are required only if the bearing inspection in FIGURE 1 and FIGURE 2 finds bearings with a roller retention feature.(b) FUNCTIONAL TEST is required only if bearings are replaced in any of the applicable Flap Positions (1, 2, 7 or 8). **Group 1-3, Configuration 2: Table 4: Inspection/Replacement of the TE Flap Support Rib Bearings at the TE Flap Support Rib**  **Assembly in Flap Position 8**
**Notes Elapsed Hours**  **Task-Hours Number of Persons**  **Task** 1.75 1.75 1 PREPARE 1.25 2.50 2 FIGURE 1 1.25 2.50 2 FIGURE 2 (a) 1.25 2.50 2 FIGURE 3 (a) 1.25 2.50 2 FIGURE 4 1.25 2.50 2 FIGURE 8 (b) 0.50 1.00 2 FUNCTIONAL TEST 8.50 12.75 Total per rib position (a) FIGURE 3 and FIGURE 4 are required only if the bearing inspection in FIGURE 1 and FIGURE 2 finds bearings with a roller retention feature.(b) FUNCTIONAL TEST is required only if bearings are replaced in any of the applicable Flap Positions (1, 2, 7 or 8).

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: February 12, 2013 767-27A0227 28 of 78 **BOEING SERVICE BULLETIN 767-27A0227 ALERT**  **ALERT Group 1, 3, Configuration 1:**  **Table 5: Reidentify the TE Flap Support Rib Sssembly at Flap Position 1 and Position 8 with the Correct New Part Numbers**  **Elapsed Hours Task-Hours**  **Number of Per- sons**  **Task**

1.75 1.75 1 Prepare 0.25 0.50 2 FIGURE 9 2.00 2.25 Total per rib position **Group 2, Configuration 1:** No further action required. **H. Weight and Balance Changes**
None. **I. Electrical Load Data**
None. **J. References** 1. Existing Data: a. Boeing Service Bulletin 767-27A0222, 767-27-0223 b. Boeing Service Related Problem (SRP) 767-SRP-57-0235, 767-SRP-57-0255 c. Component Maintenance Manual (CMM) 27-51-10, 27-51-49 d. Service Bulletin Index D624T001 e. Standard Overhaul Practices Manual (SOPM) 20-30-03, 20-50-10 f. 767 Aircraft Maintenance Manual (AMM) 06-44-00, 20-10-23, 24-22-00, 27-51-00, 27-51-21, 27-51-22, 27-51-45, 27-61-00, 29-11-00, 32-00-15, 32-00-20 2. Data Supplied with this Service Bulletin:
None. 3. Installation Drawings Used in the Preparation of this Service Bulletin:
**Title Drawing Number**  RIB - SUPPORT NO. 1 T.E FLAP 113T1328 RIB - SUPPORT NO. 2 T.E FLAP 113T1329 RIB INSTL - OUTBOARD T.E. FLAP SUPPORT 113T1345

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: February 12, 2013 767-27A0227 29 of 78 **BOEING SERVICE BULLETIN 767-27A0227 ALERT**  **ALERT**These drawings were used to prepare this service bulletin. These drawings are not necessary to make the specified changes, and are not supplied with this service bulletin. These drawings may not be applicable to all airplane configurations or operators. **K. Publications Affected**
1. Publications: **Chapter-Section Publication**  27-51 767 Aircraft Maintenance Manual 27-51 767 Illustrated Parts Catalog 2. Damage Tolerance Based Structural Inspections: Boeing has evaluated the repairs or changes in this service bulletin for effects on Fatigue Critical Structure (FCS) and for changes to Damage Tolerance Inspections (DTI) required in the Maintenance Program. This service bulletin does not affect FCS, therefore DTIs are not necessary. **L. Interchangeability and Intermixability of Parts** Refer to Paragraph 2.C., Parts Necessary for Each Airplane, for interchangeability and intermixability information. **M. Software Accomplishment Summary** Not affected.

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: February 12, 2013 767-27A0227 30 of 78 **BOEING SERVICE BULLETIN 767-27A0227 ALERT**  **ALERT 2. MATERIAL INFORMATION**  **A. Material - Price and Availability** Boeing can supply the kits shown in Paragraph 2.C., Parts Necessary for Each Airplane, as shown below. If there is a limit to the quantity of available kits, a supply sequence is given by Spares. More kits become available as shown in the Reorder Lead Time (ROLT). ROLT is calculated from the date Boeing gets the purchase order.
**Unit Price thru August 31, 2013**  **ROLT (Weeks) Name**  **Kit Number** $1,484.00 43 Top Kit - 767 TE Flap Bearing Replacement 015T1847-2 (a) One (1) kit required per applicable Flap Position: up to four (4) kits required per airplane (one for each TE Flap support rib assembly in Flap Positions 1, 2, 7, and 8). The kits are subject to the terms and conditions of the Boeing standard purchase order acknowledgment. After the Unit Price date, new price and ROLT data is applicable. Prices are in United States dollars. Terms: Net 30 days. Reference this service bulletin and submit your purchase order by one of the methods that follow: 1. Order on-line via ATA Spec 2000 or Boeing Part Page 2. Fax to (206) 662-7145
3. Mail to: Spares Customer Support - MC 36-65 Boeing Spares Department P.O. Box 3707 Seattle, Washington 98124-2207 USA **B. Industry Support Information** Boeing warranty remedies are available for 767 airplanes in warranty as of July 15, 2009. For task hour reimbursement for airplanes in warranty as of that date, send a warranty claim to Boeing Commercial Airplanes Group - Warranties. The kits and parts for airplanes in warranty as of that date will be supplied at no charge. Send a purchase order for the kits and parts to Boeing Spares. Please refer to this service bulletin number and reference the airplane variable numbers in your purchase order. **C. Parts Necessary for Each Airplane** 1. Kits/Parts To get the kits/parts shown below, refer to Paragraph 2.A., Material - Price and Availability.

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: February 12, 2013 767-27A0227 31 of 78 **BOEING SERVICE BULLETIN 767-27A0227 ALERT**  **ALERT Kit 015T1847-2**  **Notes Existing Part**  **Number Name**  **QTY New Part Number** 

**-** (a) (b) (c) (d) 60B00178-23 (DAT72-90A1- 501) BEARING 2 SB-1131

(c) (d) 113T1256-31 SEAL 4 113T1256-31 (a) SB-1131 bearings (McGill) have a roller retention feature, and qualify to two Boeing specifications, 60B00178-23 and S113T134-1. Boeing specification 60B00178-23 does not require a roller retention feature for the bearings, while Boeing specification S113T134-1 does. McGill bearings packing and documentation usually include the part information for the vendor part number (SB-1131, in this case) and a Boeing specification number (60B00178-23 or S113T134-1). For this service bulletin, the intent is to install new bearings that comply with Boeing specification number S113T134-1, regardless if the bearing qualifies for other Boeing specifications as well. Any substitute bearing for the McGill SB-1131 must have a roller retention feature and meet Boeingspecifications given in S113T134-1 (such as DAT72-90A1-506, for example), (b) The second bearing qualified to the 60B00178-23 Boeing specification is the bearing DAT72-90A1-501 (Rexnord). This bearing does not have a roller retention feature. Rexnord bearings DAT72-90A1-501 must be removed from spares inventories and service. (c) Discard the existing part. For the existing bearings, discard as long as there is no roller retention feature. (d) You cannot use the existing part to replace the new or changed part.
**NOTE:** One top kit and the items shown in Paragraph 2.C.2., Parts and Materials Supplied by the Operator, are necessary for each Trailing Edge Flap position. A total of four kits are necessary per airplane. 2. Parts and Materials Supplied by the Operator
**Notes Name**  **QTY Part Number /**  **Specification** or equivalent. Safety Lockwire

- MS20995NC40

- Corrosion Inhibiting Compound

- BMS3-38

- Grease

- BMS3-33 or equivalent. Solvent

- BMS11-9

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: February 12, 2013 767-27A0227 32 of 78 **BOEING SERVICE BULLETIN 767-27A0227 ALERT**  **ALERT Notes**  **Name QTY**  **Part Number / Specification**  Quantity of TE rotary actuators depends on the number of rotary actuators that need to be replaced. Up to 4 TE rotary actuators may be needed per airplane. Trailing Edge (TE) Rotary Actuator 0-4 256T3250-4

(a)Quantity of TE rotary actuators depends on the number of rotary actuators that need to be replaced. Up to 4 TE rotary actuators may be needed per airplane. TE Rotary Actuator 0-4 256T6110-3

(b) (a) 767-200/-300/-300F Airplanes. Applicable CMM 27-51-10. (b) 767-400ER Airplanes. Applicable CMM 27-51-49.
3. Parts Modified and Reidentified The parts shown below are changed as shown in this service bulletin. The quantity (QTY) is the number of parts changed on each airplane. **Group 1:**
**Notes New Part Number**  **Name QTY**  **Existing Part Number**  (a) 015T1847-7 RIB SUPPORT 1 1 113T1328-1 (a) 015T1847-3 RIB SUPPORT 1 1 113T1328-5 (a) 015T1847-5 RIB SUPPORT 1 1 113T1328-7 (a) 113T1329-93 RIB SUPPORT 2 1 113T1329-1 (a) 113T1329-95 RIB SUPPORT 2 1 113T1329-3 (a) 113T1329-97 RIB SUPPORT 2 1 113T1329-5 (a) 113T1329-94 RIB SUPPORT 7 1 113T1329-2 (a) 113T1329-96 RIB SUPPORT 7 1 113T1329-4 (a) 113T1329-98 RIB SUPPORT 7 1 113T1329-6 (a) 015T1847-8 RIB SUPPORT 8 1 113T1328-4 (a) 015T1847-4 RIB SUPPORT 8 1 113T1328-6 (a) 015T1847-6 RIB SUPPORT 8 1 113T1328-8 (a) This is the new rib support part number after the bearing replacement is done in accordance with this service bulletin.

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: February 12, 2013 767-27A0227 33 of 78 **BOEING SERVICE BULLETIN 767-27A0227 ALERT**  **ALERT Group 2:** 
**Notes New Part Number**  **Name QTY**  **Existing Part Number**  (a) 113T1328-105 RIB SUPPORT 1 1 113T1328-99 (a) 113T1329-97 RIB SUPPORT 2 1 113T1329-5 (a) 113T1329-98 RIB SUPPORT 7 1 113T1329-6 (a) 113T1328-106 RIB SUPPORT 8 1 113T1328-100 (a) This is the new rib support part number after the bearing replacement is done in accordance with this service bulletin. **Group 3:**
**Notes New Part Number**  **Name QTY**  **Existing Part Number**  (a) 015T1847-7 RIB SUPPORT 1 1 113T1328-1 (a) 015T1847-9 RIB SUPPORT 1 1 113T1345-133 (a) 113T1329-93 RIB SUPPORT 2 1 113T1329-1 (a) 015T1847-10 RIB SUPPORT 2 1 113T1345-131 (a) 015T1847-13 RIB SUPPORT 2 1 113T1345-135 (a) 015T1847-15 RIB SUPPORT 2 1 113T1345-187 (a) 015T1847-17 RIB SUPPORT 2 1 113T1345-259 (a) 113T1329-94 RIB SUPPORT 7 1 113T1329-2 (a) 015T1847-11 RIB SUPPORT 7 1 113T1345-132 (a) 015T1847-14 RIB SUPPORT 7 1 113T1345-136 (a) 015T1847-16 RIB SUPPORT 7 1 113T1345-188 (a) 015T1847-18 RIB SUPPORT 7 1 113T1345-260 (a) 015T1847-19 RIB SUPPORT 8 1 113T1328-2 (a) 015T1847-8 RIB SUPPORT 8 1 113T1328-4 (a) 015T1847-12 RIB SUPPORT 8 1 113T1345-134 (a) This is the new rib support part number after the bearing replacement is done in accordance with this service bulletin. 4. Parts Removed and Not Replaced
None. **D. Parts Necessary to Change Spares**
None.

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: February 12, 2013 767-27A0227 34 of 78 **BOEING SERVICE BULLETIN 767-27A0227 ALERT**  **ALERT E. Special Tooling - Price and Availability** 
None. **F. Special Tooling Necessary to do this Service Bulletin** No special tools or equipment are necessary to do the change in this service bulletin. But, maintenance and overhaul tools in the manuals given in Paragraph 1.J., References, can be necessary. Examine operator tool supply to make sure all necessary tools are available. Refer to Boeing drawing number 0A-27128 'REMOVAL/INSTALLATION EQPT - OUTBOARD FLAP ACTUATOR, CRANK ARM MECHANISM'.

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: February 12, 2013 767-27A0227 35 of 78 **BOEING SERVICE BULLETIN 767-27A0227 ALERT**  **ALERT**Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: February 12, 2013 767-27A0227 36 of 78 **BOEING SERVICE BULLETIN 767-27A0227 ALERT**  **ALERT**

BLANK PAGE**3. ACCOMPLISHMENT INSTRUCTIONS**
**A. GENERAL INFORMATION CAUTION:**  KEEP THE WORK AREA, WIRES AND ELECTRICAL BUNDLES CLEAN OF METAL PARTICLES OR CONTAMINATION WHEN YOU USE TOOLS. UNWANTED MATERIAL, METAL PARTICLES OR CONTAMINATION CAUGHT IN WIRE BUNDLES CAN CAUSE DAMAGE TO THE BUNDLES. DAMAGED WIRE BUNDLES CAN CAUSE SPARKS OR OTHER ELECTRICAL DAMAGE.
**NOTE:** 1. Manual titles are referred to by acronyms. Refer to Paragraph 1.J., References, for definition of the acronyms. 2. Obey all of the warnings and cautions given in the specified manual sections. 3. Unless shown differently, these dimensions and tolerances are used:
– Linear dimensions are in inches – Tolerance on linear dimensions, other than rivet and bolt edge margins, is plus or minus 0.03 inch – Tolerance on rivet and bolt edge margin is plus or minus 0.05 inch – Angular tolerance is plus or minus 2 degrees – Hole dimensions for standard solid rivets and fasteners are in Structural Repair Manual (SRM) Chapter 51 – Torque limits to tighten nuts and bolts are in SRM Chapter 51 4. Use the approved fastener and process material substitutions in accordance with SRM Chapter 51. 5. If the length of any fastener specified in this service bulletin does not meet installation standards given in SRM Chapter 51, then a fastener of the same specification, or an approved substitute, with a length which meets the installation standards given in SRM Chapter 51 may be used. In addition, washers may be installed for fastener grip length in accordance with SRM Chapter 51. 6. A General Visual Inspection is defined as: A visual examination of an interior or exterior area, installation or assembly to detect obvious damage, failure or irregularity. This level of inspection is made from within touching distance unless otherwise specified. A mirror may be necessary to enhance visual access to all exposed surfaces in the inspection area. This level of inspection is made under normally available lighting conditions such as daylight, hangar lighting, flashlight or drop-light and may require removal or opening of access panels or doors. Stands, ladders or platforms may be required to gain proximity to the area being checked. 7. These work instructions refer to procedures included in other Boeing documents. When the words "refer to" are used and the operator has an accepted alternative procedure, the accepted alternative procedure can be used. When the words "in accordance with" are included in the instruction, the procedure in the Boeing document must be used.

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: February 12, 2013 767-27A0227 37 of 78 **BOEING SERVICE BULLETIN 767-27A0227 ALERT**  **ALERT**8. Boeing Service Letter 767-SL-51-036, Damage Reporting and Repair Plan/Design Guidelines, is an acceptable procedure to request information from Boeing for additional structural repair instructions. The Service Letter describes what information must be provided to Boeing before a structural repair can be provided. 9. Refer to APPENDIX A for guidance to find if the TE rotary actuator(s) at Flap Positions 1, 2, 7, or 8 are serviceable or if they need to be overhauled or replaced. 10. The instructions in Paragraph 3.B., Work Instructions and the figures can include operation of tools or test equipment. Boeing Engineering Tool Drawings, the Illustrated Tool and Equipment Manual, and the Special Tool and Ground Handling Drawing Index contain data on versions of the tools or test equipment that you can use. It is permitted to use replaced tools. It is not permitted to use superseded tools. 11. If it is necessary to remove more parts for access, you can remove those parts. If you can get access without removing identified parts, it is not necessary to remove all of the identified parts. Jacking and shoring limitations must be observed. 12. Where the work instructions include installation of a kept part, a new or serviceable part with the same part number can be installed as an alternative to the kept part. 13. This service bulletin includes functional test procedures for the systems changed by this service bulletin. More functional tests can possibly be necessary in accordance with standard maintenance practices because of interruption to other airplane systems. 14. Boeing tool kit drawing 0A-27128 provides dimensions and information for fabricating the recommended tools to accomplish the service bulletin work instructions. **B. WORK INSTRUCTIONS Group 2, Configuration 1:**  No further action required. **Group 1-3, Configuration 2: PREPARE ACCESS TO DO PART 1A OF THIS SERVICE BULLETIN ACCOMPLISHMENT**  **INSTRUCTIONS:** 1. Make sure downlocks are installed on the nose and main landing gear. Refer to 767 AMM 32-00-20 as an accepted procedure. **WARNING:**THE DOORS OPEN AND CLOSE QUICKLY AND CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT. 2. Open the doors for the landing gear and install the door locks. Refer to 767 AMM 32-00-15 as an accepted procedure. 3. Supply electrical power. Refer to 767 AMM 24-22-00 as an accepted procedure.

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: February 12, 2013 767-27A0227 38 of 78 **BOEING SERVICE BULLETIN 767-27A0227 ALERT**  **ALERT WARNING:** KEEP PERSONS AND EQUIPMENT AWAY FROM ALL CONTROL SURFACES AND THE WHEEL WELLS WHEN HYDRAULIC POWER IS SUPPLIED. AILERONS, ELEVATORS, RUDDER, SLATS, SPOILERS, AND STABILIZERS ARE FULLY POWERED SURFACES. WHEN YOU MOVE THE FLAP CONTROL LEVER WITH THE HYDRAULIC SYSTEM PRESSURISED, THE FLAPS AND FLAP DRIVE MECHANISMS WILL MOVE QUICKLY. INJURY TO PERSONS OR DAMAGE TO EQUIPMENT CAN OCCUR WHEN HYDRAULIC POWER IS SUPPLIED.
**WARNING:**MAKE SURE THE ACESS DOOR FOR THE ENGINER STRUT, THE INBOARD FAN COWLING, AND THE THRUST REVERSER COWLING ARE CLEAR FROM THE MOVEMENT OF THE SLATS. IF THE MOVEMENT OF THE SLATS IS BLOCKED, IT CAN CAUSE DAMAGE TO THE AIRPLANE 4. Pressurize the center hydraulic system and reservoir. Refer to 767 AMM 29-11-00 as an accepted procedure. 5. Move the Flap control lever to the 5-unit detent and permit the Flaps and slats to move to position. **NOTE:** Flaps should remain at the 5-unit detent for the inspection or replacement of the TE Flap support rib bearings. The Airplane Maintenance Manual (AMM) procedures for removal and installation of components may be accomplished with the Flaps at the 5-unit detent, instead of Flaps at the 30-unit detent. The Flaps at the 5-unit detent allow access for disconnecting the Outboard Flap Actuator Crank Arm Mechanism from the 5 - 8 link, accomplished by removing the pins at Joint 5 of the Flap linkage mechanism. 6. Deactivate the Trailing Edge Flap. Refer to 767 AMM 27-51-00 as an accepted procedure. **Group 1-3, Configuration 2: PART 1A: INSPECT THE TE FLAP SUPPORT BEARINGS AT THE TE FLAP SUPPORT RIB**  **ASSEMBLY IN FLAP POSITIONS 1, 2, 7, AND 8** 1. Get access to the Trailing Edge (TE) Flap support rib assembly for Flap Positions 1, 2, 7 and 8 by removing access panels 561JB, 561HB, 561GB on the lower surface of the wing trailing edge. Refer to 767 AMM 06-44-00. 2. Remove the applicable TE rotary actuators. Refer to 767 AMM 27-51-22 as an accepted procedure.
**NOTE:** Keep the actuator attach bolts in the retainers. 3. Remove the applicable TE position transmitters. Refer to 767 AMM 27-51-45 as an accepted procedure. 4. Do a General Visual Inspection (GVI) of each exposed face of the TE Flap support rib bearings at the TE Flap support rib assembly in Flap Positions 1, 2, 7 and 8 to determine if the bearings have a roller retention feature: **CONDITION 1: TWO BEARINGS WITH A ROLLER RETENTION FEATURE ARE INSTALLED AT TE FLAP SUPPORT RIB ASSEMBLY IN TE FLAP POSITION 1, 2, 7, or 8**  a. Confirm that both TE Flap support bearings at the applicable TE Flap support rib assembly have a retention feature with an inner race roller retainer. Refer to FIGURE 1 and FIGURE 2 as an accepted procedure.

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: February 12, 2013 767-27A0227 39 of 78 **BOEING SERVICE BULLETIN 767-27A0227 ALERT**  **ALERT NOTE:**  If visible, bearings with a roller retention feature can also be identified by the vendor (McGill) part number, SB-1131. Also, McGill bearings have a single roller configuration, with 40 rollers in total. b. Restore the applicable TE Flap support rib assembly in Flap Position(s) 1, 2, 7 or 8. Refer to FIGURE 3 as an accepted procedure to restore the outboard side of each support rib assembly. Refer to FIGURE 4 as an accepted procedure to restore the inboard side of each support rib assembly. **NOTE:** If both bearings installed at a TE Flap support rib assembly in Flap Position(s) 1, 2, 7 or 8 have a roller retention feature, the bearings at the applicable Position do not need to be replaced. c. Put the airplane back to a serviceable condition. Refer to Part 1B of this service bulletin accomplishment instructions as an accepted procedure. **CONDITION 2: AT LEAST ONE BEARING WITHOUT A ROLLER RETENTION FEATURE IS INSTALLED AT TE FLAP SUPPORT RIB ASSEMBLY IN TE FLAP POSITION 1, 2, 7, or 8**  a. Confirm that at least one of the two TE Flap support bearings installed at the applicable TE Flap support rib assembly does not have a roller retention feature. Refer to FIGURE 1 and FIGURE 2 as an accepted procedure.
**NOTE:** Bearings that do not have a retention feature have a double roller configuration with 57 rollers per bearing face for a total of 114 rollers, and a roller spacer between roller sides. The vendor (Rexnord) part number for these bearings is DAT72-90A1-501. b. If at least one of the two bearings installed at the TE Flap support rib assembly in Flap Position(s) 1, 2, 7 or 8 does not have a roller retention feature, replace both bearings at the at the applicable TE Flap support rib assembly in accordance with PART 2 of this service bulletin accomplishments instructions. **Group 1-3, Configuration 2: PART 1B: PUT THE AIRPLANE BACK TO A SERVICEABLE CONDITION**  1. Install the applicable TE position transmitters. Refer to 767 AMM 27-51-45 as an accepted procedure. 2. Install the applicable TE rotary actuators. Refer to 767 AMM 27-51-22 as an accepted procedure. 3. Install the applicable access panels at the lower surface of the wing trailing edge. Refer to 767 AMM 06-44-00 as an accepted procedure. 4. Activate the Trailing Edge Flap. Refer to 767 AMM 27-51-00 as an accepted procedure. 5. Remove electrical power, if it is not necessary. Refer to 767 AMM 24-22-00 as an accepted procedure. 6. Put the airplane back to a serviceable condition.

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: February 12, 2013 767-27A0227 40 of 78 **BOEING SERVICE BULLETIN 767-27A0227 ALERT**  **ALERT Group 1-3, Configuration 2:**  **PART 2: REPLACE THE TE FLAP SUPPORT BEARINGS AR THE TE FLAP SUPPORT RIB ASSEMBLY IN FLAP POSITIONS 1, 2, 7, AND 8**  1. If the inspection in PART 1A of the TE Flap support bearings at the TE Flap support rib assembly in Flap Position 1 found at least one bearing without a roller retention feature, replace the TE Flap support rib bearings at actuator support rib in Position 1: a. Remove the applicable Outboard Flap Actuator Crank Arm Mechanism. Refer to 767 AMM 27-51-21 as an accepted procedure. b. Get access to the bearings at the TE Flap support rib assembly in Flap Position 1. Refer to FIGURE 5 as an accepted procedure. c. Replace both bearings at the TE Flap support rib assembly. Refer to FIGURE 5 as an accepted procedure. d. Do a General Visual Inspection (GVI) of the removed TE Flap support bearings and look for bearing damage. **NOTE:** Bearing damage can be detected by finding one or more of the following conditions: — Migrated or missing rollers in the bearing face. A migrated roller is a loose roller that has partially moved or shifted horizontally out of the bearing race but is still part of the bearing assembly. A missing roller can be detected by an empty roller slot in the roller race or by counting the rollers in the exposed bearing face; there should be a total of 57 rollers in each Rexnord bearing face. — Damage on the bearing race, metal wear debris in the bearing and in the bearing grease, and bearing abrasion on the bearing face. Detecting damage on the bearing cage or the bearing race includes finding a bent, broken, cracked, indented, spalled, fractured, brinelled, nicked, burred, eroded, or deformed bearing race. Also, rollers grinding each other or the bearing race or spacer can create metal wear filings, debris, flakes, or splinters inside and around the bearing, leading to bearing abrasion or other damage conditions. (1) Record the condition of the removed TE Flap support bearings. Refer to APPENDIX A for the accepted bearing damage definitions and a suggested worksheet to record the condition of the removed bearings.
**NOTE:** Damage of the TE support rib bearings can result in the introduction of side loading into the associated TE rotary actuator, compromising it. Overhaul or replacement of the applicable TE rotary actuator may be required depending on the condition of the removed bearings. e. Find if the TE rotary actuators at Flap Position 1 is serviceable or if it needs to be overhauled or replaced. Refer to APPENDIX A for the accepted bearing damage definitions. **CONDITION 1: Both bearings at the TE Flap support rib assembly have at least one face each that meets the definitions of good or slightly damaged bearing face**  (1) If there is at least one good or slightly damaged bearing face in each bearing at the TE Flap support rib assembly in Flap Position 1, the TE rotary actuator is acceptable and may be used as-is.

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: February 12, 2013 767-27A0227 41 of 78 **BOEING SERVICE BULLETIN 767-27A0227 ALERT**  **ALERT**(2) Install the Outboard Flap Actuator Crank Arm Mechanism. Refer to 767 AMM 27-51-21 as an accepted procedure. **NOTE:**As part of the installation of the Outboard Flap Actuator Crank Arm Mechanism, the instructions include steps to restore the TE Flap support rib assembly and reinstall the TE position transmitter and the torque tube. **CONDITION 2: Only one bearing at the TE Flap support rib assembly has at least one face that meets the definition of good or slightly damaged bearing face. The other**  **bearing at the same TE Flap support rib assembly has faces that meet the definitions of moderately damaged or fractured bearing face**  (1) If there is at least one good or slightly damaged bearing face in only one bearing at the TE Flap support rib in Flap Position 1, do one of the two options: **OPTION 1: Overhaul the TE Rotary Actuator** (a) Overhaul the removed TE rotary actuator in accordance with CMM 27-51-10 or CMM 27-51-49. **NOTE:**The removed TE rotary actuator cannot be returned to service unless a complete disassembly of the unit, a Non-Destructive Inspection (NDI) of all components, check all rotary actuator parts, repair, if necessary, clean, reassemble the unit, and test, are completed in accordance with CMM 27-51-10 or CMM 27-51-49. (b) Install the Outboard Flap Actuator Crank Arm Mechanism. Refer to 767 AMM 27-51-21 as an accepted procedure. **NOTE:**As part of the installation instructions for the Outboard Flap Actuator Crank Arm Mechanism, reinstall the overhauled TE rotary actuator. Also as part of the installation of the Outboard Flap Actuator Crank Arm Mechanism, the instructions include steps restore the TE Flap support rib assembly and reinstall the TE position transmitter and the torque tube. **OPTION 2: Replace the TE Rotary Actuator** (a) Get a serviceable replacement for the removed TE rotary actuator.
**NOTE:**The removed TE rotary actuator cannot be returned to service unless a complete disassembly of the unit, a Non-Destructive Inspection (NDI) of all components, check all rotary actuator parts, repair, if necessary, clean, reassemble the unit, and test, are completed in accordance with CMM 27-51-10 or CMM 27-51-49 A serviceable replacement for the removed TE rotary actuator can be a new or overhauled unit that is in serviceable condition. (b) Install the Outboard Flap Actuator Crank Arm Mechanism. Refer to 767 AMM 27-51-21 as an accepted procedure.

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: February 12, 2013 767-27A0227 42 of 78 **BOEING SERVICE BULLETIN 767-27A0227 ALERT**  **ALERT NOTE:** As part of the installation instructions for the Outboard Flap Actuator Crank Arm Mechanism, install an overhauled or new TE rotary actuator. Also as part of the installation of the Outboard Flap Actuator Crank Arm Mechanism, the instructions include steps restore the TE Flap support rib assembly and reinstall the TE position transmitter and the torque tube. **CONDITION 3: Both bearings at the TE Flap support rib assembly have all faces that meet the definitions of moderately damaged or fractured bearing face**  (1) Get a serviceable replacement for the removed TE rotary actuator if the GVI finds that there are two moderately damaged or fractured bearing faces in each bearing at the TE Flap support rib assembly in Flap Position 1. **NOTE:**A serviceable replacement for the removed TE rotary actuator can be a new or overhauled unit that is in serviceable condition. (2) Discard the removed TE rotary actuator. (3) Install the Outboard Flap Actuator Crank Arm Mechanism. Refer to 767 AMM 27-51-21 as an accepted procedure. **NOTE:**As part of the installation instructions for the Outboard Flap Actuator Crank Arm Mechanism, install an overhauled or new TE rotary actuator. Also as part of the installation of the Outboard Flap Actuator Crank Arm Mechanism, the instructions include steps restore the TE Flap support rib assembly and reinstall the TE position transmitter and the torque tube. 2. If the inspection in PART 1A of the TE Flap support bearings at the TE Flap support rib assembly in Flap Position 2 found at least one bearing without a roller retention feature, replace the TE Flap support rib bearings at actuator support rib in Position 2: a. Remove the applicable Outboard Flap Actuator Crank Arm Mechanism. Refer to 767 AMM 27-51-21 as an accepted procedure. b. Get access to the bearings at the TE Flap support rib assembly in Flap Position 2. Refer to FIGURE 6. c. Replace both bearings at the TE Flap support rib assembly. Refer to FIGURE 6. d. Do a General Visual Inspection (GVI) of the removed TE Flap support bearings and look for bearing damage. **NOTE:** Bearing damage can be detected by finding one or more of the following conditions: — Migrated or missing rollers in the bearing face. A migrated roller is a loose roller that has partially moved or shifted horizontally out of the bearing race but is still part of the bearing assembly. A missing roller can be detected by an empty roller slot in the roller race or by counting the rollers in the exposed bearing face; there should be a total of 57 rollers in each Rexnord bearing face.

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: February 12, 2013 767-27A0227 43 of 78 **BOEING SERVICE BULLETIN 767-27A0227 ALERT**  **ALERT**— Damage on the bearing race, metal wear debris in the bearing and in the bearing grease, and bearing abrasion on the bearing face. Detecting damage on the bearing cage or the bearing race includes finding a bent, broken, cracked, indented, spalled, fractured, brinelled, nicked, burred, eroded, or deformed bearing race. Also, rollers grinding each other or the bearing race or spacer can create metal wear filings, debris, flakes, or splinters inside and around the bearing, leading to bearing abrasion or other damage conditions. (1) Record the condition of the removed TE Flap support bearings. Refer to APPENDIX A for the accepted bearing damage definitions and a suggested worksheet to record the condition of the removed bearings.
**NOTE:** Damage of the TE support rib bearings can result in the introduction of side loading into the associated TE rotary actuator, compromising it. Overhaul or replacement of the applicable TE rotary actuator may be required depending on the condition of the removed bearings. e. Find if the TE rotary actuators at Flap Position 2 is serviceable or if it needs to be overhauled or replaced. Refer to APPENDIX A for the accepted bearing damage definitions. **CONDITION 1: Both bearings at the TE Flap support rib assembly have at least one face each that meets the definitions of good or slightly damaged bearing face**  (1) If there is at least one good or slightly damaged bearing face in each bearing at the TE Flap support rib assembly in Flap Position 2, the TE rotary actuator is acceptable and may be used as-is. (2) Install the Outboard Flap Actuator Crank Arm Mechanism. Refer to 767 AMM 27-51-21 as an accepted procedure. **NOTE:**As part of the installation of the Outboard Flap Actuator Crank Arm Mechanism, the instructions include steps to restore the TE Flap support rib assembly and reinstall the TE position transmitter and the torque tube. **CONDITION 2: Only one bearing at the TE Flap support rib assembly has at least one face that meets the definition of good or slightly damaged bearing face. The other**  **bearing at the same TE Flap support rib assembly has faces that meet the definitions of moderately damaged or fractured bearing face**  (1) If there is at least one good or slightly damaged bearing face in only one bearing at the TE Flap support rib in Flap Position 2, do one of the two options: **OPTION 1: Overhaul the TE Rotary Actuator** (a) Overhaul the TE rotary actuator in accordance with CMM 27-51-10 or CMM 27-51-49.
**NOTE:**The removed TE rotary actuator cannot be returned to service unless a complete disassembly of the unit, a Non-Destructive Inspection (NDI) of all components, check all rotary actuator parts, repair, if necessary, clean, reassemble the unit, and test, are completed in accordance with CMM 27-51-10 or CMM 27-51-49.

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: February 12, 2013 767-27A0227 44 of 78 **BOEING SERVICE BULLETIN 767-27A0227 ALERT**  **ALERT**(b) Install the Outboard Flap Actuator Crank Arm Mechanism. Refer to 767 AMM 27-51-21 as an accepted procedure. **NOTE:**As part of the installation instructions for the Outboard Flap Actuator Crank Arm Mechanism, reinstall the overhauled TE rotary actuator. Also as part of the installation of the Outboard Flap Actuator Crank Arm Mechanism, the instructions include steps restore the TE Flap support rib assembly and reinstall the TE position transmitter and the torque tube. **OPTION 2: Replace the TE Rotary Actuator** (a) Get a serviceable replacement for the removed TE rotary actuator.
**NOTE:**The removed TE rotary actuator cannot be returned to service unless a complete disassembly of the unit, a Non-Destructive Inspection (NDI) of all components, check all rotary actuator parts, repair, if necessary, clean, reassemble the unit, and test, are completed in accordance with CMM 27-51-10 or CMM 27-51-49 A serviceable replacement for the removed TE rotary actuator can be a new or overhauled unit that is in serviceable condition. (b) Install the Outboard Flap Actuator Crank Arm Mechanism. Refer to 767 AMM 27-51-21 as an accepted procedure. **NOTE:**As part of the installation instructions for the Outboard Flap Actuator Crank Arm Mechanism, install an overhauled or new TE rotary actuator. Also as part of the installation of the Outboard Flap Actuator Crank Arm Mechanism, the instructions include steps restore the TE Flap support rib assembly and reinstall the TE position transmitter and the torque tube. **CONDITION 3: Both bearings at the TE Flap support rib assembly have all faces that meet the definitions of moderately damaged or fractured bearing face**  (1) Get a serviceable replacement for the removed TE rotary actuator if the GVI finds that there are two moderately damaged or fractured bearing faces in each bearing at the TE Flap support rib assembly in Flap Position 2. **NOTE:**A serviceable replacement for the removed TE rotary actuator can be a new or overhauled unit that is in serviceable condition. (2) Discard the removed TE rotary actuator. (3) Install the Outboard Flap Actuator Crank Arm Mechanism. Refer to 767 AMM 27-51-21 as an accepted procedure. **NOTE:**As part of the installation instructions for the Outboard Flap Actuator Crank Arm Mechanism, install an overhauled or new TE rotary actuator.

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: February 12, 2013 767-27A0227 45 of 78 **BOEING SERVICE BULLETIN 767-27A0227 ALERT**  **ALERT**Also as part of the installation of the Outboard Flap Actuator Crank Arm Mechanism, the instructions include steps restore the TE Flap support rib assembly and reinstall the TE position transmitter and the torque tube. 3. If the inspection in PART 1A of the TE Flap support bearings at the TE Flap support rib assembly in Flap Position 7 found at least one bearing without a roller retention feature, replace the TE Flap support rib bearings at actuator support rib in Position 7: a. Remove the applicable Outboard Flap Actuator Crank Arm Mechanism. Refer to 767 AMM 27-51-21 as an accepted procedure. b. Get access to the bearings at the TE Flap support rib assembly in Flap Position 7. Refer to FIGURE 7. c. Replace both bearings at the TE Flap support rib assembly. Refer to FIGURE 7. d. Do a General Visual Inspection (GVI) of the removed TE Flap support bearings and look for bearing damage. **NOTE:** Bearing damage can be detected by finding one or more of the following conditions: — Migrated or missing rollers in the bearing face. A migrated roller is a loose roller that has partially moved or shifted horizontally out of the bearing race but is still part of the bearing assembly. A missing roller can be detected by an empty roller slot in the roller race or by counting the rollers in the exposed bearing face; there should be a total of 57 rollers in each Rexnord bearing face. — Damage on the bearing race, metal wear debris in the bearing and in the bearing grease, and bearing abrasion on the bearing face. Detecting damage on the bearing cage or the bearing race includes finding a bent, broken, cracked, indented, spalled, fractured, brinelled, nicked, burred, eroded, or deformed bearing race. Also, rollers grinding each other or the bearing race or spacer can create metal wear filings, debris, flakes, or splinters inside and around the bearing, leading to bearing abrasion or other damage conditions. (1) Record the condition of the removed TE Flap support bearings. Refer to APPENDIX A for the accepted bearing damage definitions and a suggested worksheet to record the condition of the removed bearings.
**NOTE:** Damage of the TE support rib bearings can result in the introduction of side loading into the associated TE rotary actuator, compromising it. Overhaul or replacement of the applicable TE rotary actuator may be required depending on the condition of the removed bearings. e. Find if the TE rotary actuators at Flap Position 7 is serviceable or if it needs to be overhauled or replaced. Refer to APPENDIX A for the accepted bearing damage definitions. **CONDITION 1: Both bearings at the TE Flap support rib assembly have at least one face each that meets the definitions of good or slightly damaged bearing face**  (1) If there is at least one good or slightly damaged bearing face in each bearing at the TE Flap support rib assembly in Flap Position 7, the TE rotary actuator is acceptable and may be used as-is.

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: February 12, 2013 767-27A0227 46 of 78 **BOEING SERVICE BULLETIN 767-27A0227 ALERT**  **ALERT**(2) Install the Outboard Flap Actuator Crank Arm Mechanism. Refer to 767 AMM 27-51-21 as an accepted procedure. **NOTE:**As part of the installation of the Outboard Flap Actuator Crank Arm Mechanism, the instructions include steps to restore the TE Flap support rib assembly and reinstall the TE position transmitter and the torque tube. **CONDITION 2: Only one bearing at the TE Flap support rib assembly has at least one face that meets the definition of good or slightly damaged bearing face. The other**  **bearing at the same TE Flap support rib assembly has faces that meet the definitions of moderately damaged or fractured bearing face**  (1) If there is at least one good or slightly damaged bearing face in only one bearing at the TE Flap support rib in Flap Position 7, do one of the two options: **OPTION 1: Overhaul the TE Rotary Actuator** (a) Overhaul the TE rotary actuator in accordance with CMM 27-51-10 or CMM 27-51-49.
**NOTE:**The removed TE rotary actuator cannot be returned to service unless a complete disassembly of the unit, a Non-Destructive Inspection (NDI) of all components, check all rotary actuator parts, repair, if necessary, clean, reassemble the unit, and test, are completed in accordance with CMM 27-51-10 or CMM 27-51-49. (b) Install the Outboard Flap Actuator Crank Arm Mechanism. Refer to 767 AMM 27-51-21 as an accepted procedure. **NOTE:**As part of the installation instructions for the Outboard Flap Actuator Crank Arm Mechanism, reinstall the overhauled TE rotary actuator. Also as part of the installation of the Outboard Flap Actuator Crank Arm Mechanism, the instructions include steps restore the TE Flap support rib assembly and reinstall the TE position transmitter and the torque tube. **OPTION 2: Replace the TE Rotary Actuator** (a) Get a serviceable replacement for the removed TE rotary actuator.
**NOTE:**The removed TE rotary actuator cannot be returned to service unless a complete disassembly of the unit, a Non-Destructive Inspection (NDI) of all components, check all rotary actuator parts, repair, if necessary, clean, reassemble the unit, and test, are completed in accordance with CMM 27-51-10 or CMM 27-51-49 A serviceable replacement for the removed TE rotary actuator can be a new or overhauled unit that is in serviceable condition. (b) Install the Outboard Flap Actuator Crank Arm Mechanism. Refer to 767 AMM 27-51-21 as an accepted procedure. **NOTE:**As part of the installation instructions for the Outboard Flap Actuator Crank Arm Mechanism, install an overhauled or new TE rotary actuator.

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: February 12, 2013 767-27A0227 47 of 78 **BOEING SERVICE BULLETIN 767-27A0227 ALERT**  **ALERT**Also as part of the installation of the Outboard Flap Actuator Crank Arm Mechanism, the instructions include steps restore the TE Flap support rib assembly and reinstall the TE position transmitter and the torque tube. **CONDITION 3: Both bearings at the TE Flap support rib assembly have all faces that meet the definitions of moderately damaged or fractured bearing face**  (1) Get a serviceable replacement for the removed TE rotary actuator if the GVI finds that there are two moderately damaged or fractured bearing faces in each bearing at the TE Flap support rib assembly in Flap Position 7. **NOTE:**A serviceable replacement for the removed TE rotary actuator can be a new or overhauled unit that is in serviceable condition. (2) Discard the removed TE rotary actuator. (3) Install the Outboard Flap Actuator Crank Arm Mechanism. Refer to 767 AMM 27-51-21 as an accepted procedure. **NOTE:**As part of the installation instructions for the Outboard Flap Actuator Crank Arm Mechanism, install an overhauled or new TE rotary actuator. Also as part of the installation of the Outboard Flap Actuator Crank Arm Mechanism, the instructions include steps restore the TE Flap support rib assembly and reinstall the TE position transmitter and the torque tube. 4. If the inspection in PART 1A of the TE Flap support bearings at the TE Flap support rib assembly in Flap Position 8 found at least one bearing without a roller retention feature, replace the TE Flap support rib bearings at actuator support rib in Position 8: a. Remove the applicable Outboard Flap Actuator Crank Arm Mechanism. Refer to 767 AMM 27-51-21 as an accepted procedure. b. Get access to the bearings at the TE Flap support rib assembly in Flap Position 8. Refer to FIGURE 8. c. Replace both bearings at the TE Flap support rib assembly. Refer to FIGURE 8. d. Do a General Visual Inspection (GVI) of the removed TE Flap support bearings and look for bearing damage. **NOTE:** Bearing damage can be detected by finding one or more of the following conditions: — Migrated or missing rollers in the bearing face. A migrated roller is a loose roller that has partially moved or shifted horizontally out of the bearing race but is still part of the bearing assembly. A missing roller can be detected by an empty roller slot in the roller race or by counting the rollers in the exposed bearing face; there should be a total of 57 rollers in each Rexnord bearing face.

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: February 12, 2013 767-27A0227 48 of 78 **BOEING SERVICE BULLETIN 767-27A0227 ALERT**  **ALERT**— Damage on the bearing race, metal wear debris in the bearing and in the bearing grease, and bearing abrasion on the bearing face. Detecting damage on the bearing cage or the bearing race includes finding a bent, broken, cracked, indented, spalled, fractured, brinelled, nicked, burred, eroded, or deformed bearing race. Also, rollers grinding each other or the bearing race or spacer can create metal wear filings, debris, flakes, or splinters inside and around the bearing, leading to bearing abrasion or other damage conditions. (1) Record the condition of the removed TE Flap support bearings. Refer to APPENDIX A for the accepted bearing damage definitions and a suggested worksheet to record the condition of the removed bearings.
**NOTE:** Damage of the TE support rib bearings can result in the introduction of side loading into the associated TE rotary actuator, compromising it. Overhaul or replacement of the applicable TE rotary actuator may be required depending on the condition of the removed bearings. e. Find if the TE rotary actuators at Flap Position 8 is serviceable or if it needs to be overhauled or replaced. Refer to APPENDIX A for the accepted bearing damage definitions. **CONDITION 1: Both bearings at the TE Flap support rib assembly have at least one face each that meets the definitions of good or slightly damaged bearing face**  (1) If there is at least one good or slightly damaged bearing face in each bearing at the TE Flap support rib assembly in Flap Position 8, the TE rotary actuator is acceptable and may be used as-is. (2) Install the Outboard Flap Actuator Crank Arm Mechanism. Refer to 767 AMM 27-51-21 as an accepted procedure. **NOTE:**As part of the installation of the Outboard Flap Actuator Crank Arm Mechanism, the instructions include steps to restore the TE Flap support rib assembly and reinstall the TE position transmitter and the torque tube. **CONDITION 2: Only one bearing at the TE Flap support rib assembly has at least one face that meets the definition of good or slightly damaged bearing face. The other**  **bearing at the same TE Flap support rib assembly has faces that meet the definitions of moderately damaged or fractured bearing face**  (1) If there is at least one good or slightly damaged bearing face in only one bearing at the TE Flap support rib in Flap Position 8, do one of the two options: **OPTION 1: Overhaul the TE Rotary Actuator** (a) Overhaul the TE rotary actuator in accordance with CMM 27-51-10 or CMM 27-51-49.
**NOTE:**The removed TE rotary actuator cannot be returned to service unless a complete disassembly of the unit, a Non-Destructive Inspection (NDI) of all components, check all rotary actuator parts, repair, if necessary, clean, reassemble the unit, and test, are completed in accordance with CMM 27-51-10 or CMM 27-51-49.

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: February 12, 2013 767-27A0227 49 of 78 **BOEING SERVICE BULLETIN 767-27A0227 ALERT**  **ALERT**(b) Install the Outboard Flap Actuator Crank Arm Mechanism. Refer to 767 AMM 27-51-21 as an accepted procedure. **NOTE:**As part of the installation instructions for the Outboard Flap Actuator Crank Arm Mechanism, reinstall the overhauled TE rotary actuator. Also as part of the installation of the Outboard Flap Actuator Crank Arm Mechanism, the instructions include steps restore the TE Flap support rib assembly and reinstall the TE position transmitter and the torque tube. **OPTION 2: Replace the TE Rotary Actuator** (a) Get a serviceable replacement for the removed TE rotary actuator.
**NOTE:**The removed TE rotary actuator cannot be returned to service unless a complete disassembly of the unit, a Non-Destructive Inspection (NDI) of all components, check all rotary actuator parts, repair, if necessary, clean, reassemble the unit, and test, are completed in accordance with CMM 27-51-10 or CMM 27-51-49 A serviceable replacement for the removed TE rotary actuator can be a new or overhauled unit that is in serviceable condition. (b) Install the Outboard Flap Actuator Crank Arm Mechanism. Refer to 767 AMM 27-51-21 as an accepted procedure. **NOTE:**As part of the installation instructions for the Outboard Flap Actuator Crank Arm Mechanism, install an overhauled or new TE rotary actuator. Also as part of the installation of the Outboard Flap Actuator Crank Arm Mechanism, the instructions include steps restore the TE Flap support rib assembly and reinstall the TE position transmitter and the torque tube. **CONDITION 3: Both bearings at the TE Flap support rib assembly have all faces that meet the definitions of moderately damaged or fractured bearing face**  (1) Get a serviceable replacement for the removed TE rotary actuator if the GVI finds that there are two moderately damaged or fractured bearing faces in each bearing at the TE Flap support rib assembly in Flap Position 8. **NOTE:**A serviceable replacement for the removed TE rotary actuator can be a new or overhauled unit that is in serviceable condition. (2) Discard the removed TE rotary actuator. (3) Install the Outboard Flap Actuator Crank Arm Mechanism. Refer to 767 AMM 27-51-21 as an accepted procedure. **NOTE:**As part of the installation instructions for the Outboard Flap Actuator Crank Arm Mechanism, install an overhauled or new TE rotary actuator.

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: February 12, 2013 767-27A0227 50 of 78 **BOEING SERVICE BULLETIN 767-27A0227 ALERT**  **ALERT**Also as part of the installation of the Outboard Flap Actuator Crank Arm Mechanism, the instructions include steps restore the TE Flap support rib assembly and reinstall the TE position transmitter and the torque tube. 5. Install the applicable access panels at the lower surface of the wing trailing edge. Refer to 767 AMM 06-44-00 as an accepted procedure. 6. Remove the applicable spoiler locks. Refer to 767 AMM 27-61-00 as an accepted procedure. **Group 1-3, Configuration 2: FUNCTIONAL TEST AFTER TE FLAP SUPPORT BEARINGS REPLACEMENT**  1. Pressurize the center hydraulic system. Refer to 767 AMM 29-11-00 as an accepted procedure. 2. Operate the Flap control lever through a full cycle and make sure the Flaps operate correctly. 3. Put the airplane back to a serviceable condition. **Group 1, 3, Configuration 1: PART 3: RE-IDENTIFY THE TRAILING EDGE (TE) FLAP SUPPORT RIB ASSEMBLY FOR**  **APPLICABLE FLAP POSITIONS WITH CORRECT NEW PART NUMBERS** 1. Deactivate Trailing Edge Flap. Refer to 767 AMM 27-51-00 as an accepted procedure. 2. Get access to the Trailing Edge (TE) Flap support rib assembly for Flap Positions 1 and 8 by removing access panels 561JB, 561HB, 561GB on the lower surface of the wing trailing edge. Refer to 767 AMM 06-44-00 as an accepted procedure.
3. **Group 1, Configuration 1:** Reidentify the TE Flap support rib assembly in Flap Positions 1 and 8 with the correct new part numbers. Refer to FIGURE 9.
4. **Group 3, Configuration 1:** Reidentify the TE Flap support rib assembly in Flap Positions 1, 2, 7 and 8 with the correct new part numbers. Refer to FIGURE 9. 5. Activate Trailing Edge Flap. Refer to 767 AMM 27-51-00 as an accepted procedure. 6. Remove the power from the center hydraulic system. Refer to 767 AMM 29-11-00 as an accepted procedure. 7. Remove electrical power. Refer to 767 AMM 24-22-00 as an accepted procedure. 8. Put the airplane back to a serviceable condition.

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: February 12, 2013 767-27A0227 51 of 78 **BOEING SERVICE BULLETIN 767-27A0227 ALERT**  **ALERT This Figure applies only to: Group 1-3, Configuration 2.** 

**FIGURE 1: INSPECT THE TRAILING EDGE FLAP SUPPORT BEARINGS AT THE TE FLAP SUPPORT RIB ASSEMBLY IN FLAP POSITIONS 1, 2, 7, AND 8, OUTBOARD SIDE**  **(SHEET 1 OF 3)**
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: February 12, 2013 767-27A0227 52 of 78 **BOEING SERVICE BULLETIN 767-27A0227 ALERT**  **ALERT**The step numbers shown below agree with the numbers shown in the circle symbols in the figure. The QTY numbers shown below are the number of parts necessary for each side of the TE Flap support rib.
**More Data Qty**  **Identification Name**  **Task Step**  (a) 2

- Nut Remove / Keep 1 (a) 2

- Washer Remove / Keep (a) 1

- Nut Remove / Keep 2 (a) 1

- Washer Remove / Keep (a) 1

- Transmitter Housing Remove / Keep 3 (a)

- - Safety lockwire Remove 4 (b) 1

- Nut Remove / Keep 5 1

- Washer Remove / Keep 6 (a) 6

- Nut Remove / Keep 7 (a) 6

- Washer Remove / Keep (a) 3

- Nut Remove / Keep 8 (a) 3

- Washer Remove / Keep 1

- Rib Doubler Remove / Keep 9 1

- Bearing Locate 10

**FIGURE 1: INSPECT THE TRAILING EDGE FLAP SUPPORT BEARINGS AT THE TE FLAP SUPPORT RIB ASSEMBLY IN FLAP POSITIONS 1, 2, 7, AND 8, OUTBOARD SIDE**  **(SHEET 2 OF 3)**
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: February 12, 2013 767-27A0227 53 of 78 **BOEING SERVICE BULLETIN 767-27A0227 ALERT**  **ALERT More Data**  **Qty Identification**  **Name Task**  **Step** carefully, as required, with a piece of cloth to get visual access to bearing face - - Grease Clean 11

Do a General Visual Inspection (GVI) of the removed TEFlap support bearings and look for bearing type and possible bearing damage 1

- Bearing Inspect 12

(c) 1

- Rib Doubler Clean 13 (a) Make a note or write down the location of removed nuts and washers. During installation, the bolts, washers, and nuts should be placed in their original locations to prevent any damage. (b) Refer to 0A-27128 for suggested spanner wrench tool. (c) Clean off grease and, if present, Mastinox compound. Refer to SOPM 20-30-03.

**FIGURE 1: INSPECT THE TRAILING EDGE FLAP SUPPORT BEARINGS AT THE TE FLAP SUPPORT RIB ASSEMBLY IN FLAP POSITIONS 1, 2, 7, AND 8, OUTBOARD SIDE**  **(SHEET 3 OF 3)**
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: February 12, 2013 767-27A0227 54 of 78 **BOEING SERVICE BULLETIN 767-27A0227 ALERT**  **ALERT This Figure applies only to: Group 1-3, Configuration 2.** 

**FIGURE 2: INSPECT THE TRAILING EDGE FLAP SUPPORT BEARINGS AT THE TE FLAP SUPPORT RIB ASSEMBLY IN FLAP POSITIONS 1, 2, 7, AND 8, INBOARD SIDE**  **(SHEET 1 OF 3)**
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: February 12, 2013 767-27A0227 55 of 78 **BOEING SERVICE BULLETIN 767-27A0227 ALERT**  **ALERT**The step numbers shown below agree with the numbers shown in the circle symbols in the figure. The QTY numbers shown below are the number of parts necessary for each side of the TE Flap support rib.
**More Data Qty**  **Identification Name**  **Task Step**  (a) 7

- Nut Remove / Keep 1 (a) 7

- Washer Remove / Keep (a) 3

- Nut Remove / Keep 2 (a) 3

- Washer Remove / Keep (a) 3

- Nut Remove / Keep 3 (a) 3

- Washer Remove / Keep (a) 2

- Nut Remove / Keep 4 (a) 2

- Washer Remove / Keep (a) 1

- Nut Remove / Keep 5 (a) 1

- Washer Remove / Keep 1

- Reaction Ring Remove / Keep 6 1

- Shim Remove / Keep 7 1

- Bearing Locate 8

**FIGURE 2: INSPECT THE TRAILING EDGE FLAP SUPPORT BEARINGS AT THE TE FLAP SUPPORT RIB ASSEMBLY IN FLAP POSITIONS 1, 2, 7, AND 8, INBOARD SIDE**  **(SHEET 2 OF 3)**
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: February 12, 2013 767-27A0227 56 of 78 **BOEING SERVICE BULLETIN 767-27A0227 ALERT**  **ALERT More Data**  **Qty Identification**  **Name Task**  **Step** carefully, as required, with a piece of cloth to get visual access to bearing face - - Grease Clean 9

Do a General Visual Inspection (GVI) of the removed TEFlap support bearings and look for bearing type and possible bearing damage 1

- Bearing Inspect 10

(b) 1

- Shim Clean 11 (b) 1

- Reaction Ring Clean (a) Make a note or write down the location of removed nuts and washers. During installation, the bolts, washers, and nuts should be placed in their original locations to prevent any damage. (b) Clean off grease and, if present, Mastinox compound. Refer to SOPM 20-30-03.

**FIGURE 2: INSPECT THE TRAILING EDGE FLAP SUPPORT BEARINGS AT THE TE FLAP SUPPORT RIB ASSEMBLY IN FLAP POSITIONS 1, 2, 7, AND 8, INBOARD SIDE**  **(SHEET 3 OF 3)**
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: February 12, 2013 767-27A0227 57 of 78 **BOEING SERVICE BULLETIN 767-27A0227 ALERT**  **ALERT This Figure applies only to: Group 1-3, Configuration 2.** 

**FIGURE 3: RESTORE THE TRAILING EDGE FLAP SUPPORT BEARINGS AT THE TE FLAP SUPPORT RIB ASSEMBLY IN FLAP POSITIONS 1, 2, 7, AND 8, OUTBOARD SIDE**  **(SHEET 1 OF 3)**
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: February 12, 2013 767-27A0227 58 of 78 **BOEING SERVICE BULLETIN 767-27A0227 ALERT**  **ALERT**The step numbers shown below agree with the numbers shown in the circle symbols in the figure. The QTY numbers shown below are the number of parts necessary for each side of the TE Flap support rib.
**More Data Qty**  **Identification Name**  **Task Step**  Apply BMS3-33 grease to mating surface 1

- Rib Doubler Install (Kept) 1

Tighten nut to torque range of 220-410 Inch-Pounds 6

- Washer Install (Kept) 2

6

- Nut Install (Kept) 3

- Washer Install (Kept) 3 Tighten nut to torque range of 95-105 Inch-Pounds 3

- Nut Install (Kept)

1

- Washer Install (Kept) 4 Tighten nut to torque range of 2800-3500 Inch-Pounds 1

- Nut Install (Kept) 5
(a)

**FIGURE 3: RESTORE THE TRAILING EDGE FLAP SUPPORT BEARINGS AT THE TE FLAP SUPPORT RIB ASSEMBLY IN FLAP POSITIONS 1, 2, 7, AND 8, OUTBOARD SIDE**  **(SHEET 2 OF 3)**
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: February 12, 2013 767-27A0227 59 of 78 **BOEING SERVICE BULLETIN 767-27A0227 ALERT**  **ALERT More Data**  **Qty Identification**  **Name Task**  **Step** such that the pigtailis on top of the bearing retainer nut - MS20995NC40 Safety lockwire Install (New) 6
(c) 1

- Transmitter Housing Install (Kept) 7 (b) 2

- Washer Install (Kept) 8 (b) 2

- Nut Install (Kept) Tighten nut to torque range of 95-105 Inch-Pounds (b) 1

- Nut Install (Kept) 9 (b) 1

- Washer Install (Kept) Apply grease at this location until you see clean grease come out from the seal - BMS3-33 Grease Inject 10

(a) Refer to 0A-27128 for suggested spanner wrench tool. (b) Temporarily install fastener. Final installation to be performed with systems installation. (c) Refer to 767 AMM 20-10-23 as an accepted procedure.

**FIGURE 3: RESTORE THE TRAILING EDGE FLAP SUPPORT BEARINGS AT THE TE FLAP SUPPORT RIB ASSEMBLY IN FLAP POSITIONS 1, 2, 7, AND 8, OUTBOARD SIDE**  **(SHEET 3 OF 3)**
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: February 12, 2013 767-27A0227 60 of 78 **BOEING SERVICE BULLETIN 767-27A0227 ALERT**  **ALERT This Figure applies only to: Group 1-3, Configuration 2.** 

**FIGURE 4: RESTORE THE TRAILING EDGE FLAP SUPPORT BEARINGS AT THE TE FLAP SUPPORT RIB ASSEMBLY IN FLAP POSITIONS 1, 2, 7, AND 8, INBOARD SIDE**  **(SHEET 1 OF 2)**
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: February 12, 2013 767-27A0227 61 of 78 **BOEING SERVICE BULLETIN 767-27A0227 ALERT**  **ALERT**The step numbers shown below agree with the numbers shown in the circle symbols in the figure. The QTY numbers shown below are the number of parts necessary for each side of the TE Flap support rib.
**More Data Qty**  **Identification Name**  **Task Step**  1

- Shim Install (Kept) 1 Apply BMS3-33 grease to mating surface 1

- Reaction Ring Install (Kept) 2

3

- Washer Install (Kept) 3 Tighten nut to torque range of 220-410 Inch-Pounds 3

- Nut Install (Kept)

2

- Washer Install (Kept) 4 Tighten nut to torque range of 370-690 Inch-Pounds 2

- Nut Install (Kept)

3

- Washer Install (Kept) 5 Tighten nut to torque range of 220-410 Inch-Pounds 3

- Nut Install (Kept)

7

- Washer Install (Kept) 6 Tighten nut to torque range of 370-690 Inch-Pounds 7

- Nut Install (Kept)

1

- Washer Install (Kept) 7 Tighten nut to torque range of 150-170 Inch-Pounds 1

- Nut Install (Kept)

Apply grease at this location until you see clean grease come out from the seal - BMS3-33 Grease Inject 8

**FIGURE 4: RESTORE THE TRAILING EDGE FLAP SUPPORT BEARINGS AT THE TE FLAP SUPPORT RIB ASSEMBLY IN FLAP POSITIONS 1, 2, 7, AND 8, INBOARD SIDE**  **(SHEET 2 OF 2)**
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: February 12, 2013 767-27A0227 62 of 78 **BOEING SERVICE BULLETIN 767-27A0227 ALERT**  **ALERT This Figure applies only to: Group 1-3, Configuration 2.** 

**FIGURE 5: REPLACE THE TRAILING EDGE FLAP SUPPORT BEARINGS AT THE TE FLAP SUPPORT RIB ASSEMBLY IN FLAP POSITION 1**  **(SHEET 1 OF 3)**
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: February 12, 2013 767-27A0227 63 of 78 **BOEING SERVICE BULLETIN 767-27A0227 ALERT**  **ALERT**The step numbers shown below agree with the numbers shown in the circle symbols in the figure. The QTY numbers shown below are the number of parts necessary for each TE Flap support rib.
**More Data Qty**  **Identification Name**  **Task Step**  (b) 1

- Bushing Remove / Keep 1 **CAUTION:** MAKE A NOTE OF THE SEAL ORIENTATION. DURING INSTALLATION, THE SEAL MUST BE CORRECTLY ORIENTED TO AVOID BEARING DAMAGE DUE TO LACK OF LUBRICATION.

4 113T1256-31 Seal Remove 2 with wet primer BMS10-11 4 113T1256-31 SEAL Install (New)

**CAUTION:** DO NOT HIT THE ENDS OF THE SHAFT WHEN YOU REMOVE OR INSTALL THE SHAFT ON THE SUPPORT RIBS AS THIS CAN APPLY FORCES ON THE BEARING INNER RACE AND CAUSE DAMAGE TO THE BEARINGS.

**CAUTION:** DO NOT APPLY FORCE ON THE SUPPORT RIBS TO INSTALL OR REMOVE THE SHAFT AS THIS CAN CAUSE DAMAGE TO THE SUPPORT RIBS.

**CAUTION:** MAKE SURE THAT THE PARTS, LUBRICANT, AND CORROSION INHIBITING COMPOUND ARE CLEAN. CONTAMINATION ON THE PARTS CAN CAUSE DAMAGE TO THE MATING SURFACES.

Refer to APPENDIX A bearing damage definitions and asuggested worksheet to record thecondition of the removed bearings 2 60B00178-23 Bearing Remove 3

or any other bearing that meets Boeing specifications S113T134-1 2 SB-1131 BEARING, SPHERI-CAL ROLLER, AIRFRAME, INCH Install (New)

(a) (b) (c) (d) 1

- Bushing Clean 4 (d) 1

- Shaft Clean (d) 1

- Crank arm assy Clean (d) 1

- Rib Doubler Clean (d) 1

- Bearing Retainer Clean (e)

- BMS3-38 Corrosion Inhibiting Compound Apply 5

**FIGURE 5: REPLACE THE TRAILING EDGE FLAP SUPPORT BEARINGS AT THE TE FLAP SUPPORT RIB ASSEMBLY IN FLAP POSITION 1**  **(SHEET 2 OF 3)**
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: February 12, 2013 767-27A0227 64 of 78 **BOEING SERVICE BULLETIN 767-27A0227 ALERT**  **ALERT More Data**  **Qty Identification**  **Name Task**  **Step**

- - Bushing Install (Kept) 6 (f) (g) 1

- TE Flap support rib as- sembly Identify 7 (a) Install with BMS3-33 grease. (b) Refer to Boeing tool kit drawing 0A-27128 for suggested shaft removal/installation and spanner wrench tools. Use tool to push the end of the shaft, the crank arm, and the bushing together. (c) You can tap the shaft with a light mallet to help align the bearing to the shaft during bearing installation. Refer to Boeing tool kit drawing 0A-27128 for suggested bearing installation tool. (d) Clean off grease and, if present, Mastinox compound. Refer to SOPM 20-30-03. (e) Apply corrosion-inhibiting compound to surfaces of cavities and splines that make contact between the shaft and the crank arm. Wipe off squeeze-out with dry wiper. (f) Refer to Paragraph 2.C.3., Parts Modified and Reidentified for existing and new part numbers. (g) Repart mark the TE Flap support rib assembly. Refer to SOPM 20-50-10.

**FIGURE 5: REPLACE THE TRAILING EDGE FLAP SUPPORT BEARINGS AT THE TE FLAP SUPPORT RIB ASSEMBLY IN FLAP POSITION 1**  **(SHEET 3 OF 3)**
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: February 12, 2013 767-27A0227 65 of 78 **BOEING SERVICE BULLETIN 767-27A0227 ALERT**  **ALERT This Figure applies only to: Group 1-3, Configuration 2.** 

**FIGURE 6: REPLACE THE TRAILING EDGE FLAP SUPPORT BEARINGS AT THE TE FLAP SUPPORT RIB ASSEMBLY IN FLAP POSITION 2**  **(SHEET 1 OF 3)**
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: February 12, 2013 767-27A0227 66 of 78 **BOEING SERVICE BULLETIN 767-27A0227 ALERT**  **ALERT**The step numbers shown below agree with the numbers shown in the circle symbols in the figure. The QTY numbers shown below are the number of parts necessary for each TE Flap support rib.
**More Data Qty**  **Identification Name**  **Task Step**  (b) 1

- Bushing Remove / Keep 1 **CAUTION:** MAKE A NOTE OF THE SEAL ORIENTATION. DURING INSTALLATION, THE SEAL MUST BE CORRECTLY ORIENTED TO AVOID BEARING DAMAGE DUE TO LACK OF LUBRICATION.

4 113T1256-31 Seal Remove 2 with wet primer BMS10-11 4 113T1256-31 SEAL Install (New)

**CAUTION:** DO NOT HIT THE ENDS OF THE SHAFT WHEN YOU REMOVE OR INSTALL THE SHAFT ON THE SUPPORT RIBS AS THIS CAN APPLY FORCES ON THE BEARING INNER RACE AND CAUSE DAMAGE TO THE BEARINGS.

**CAUTION:** DO NOT APPLY FORCE ON THE SUPPORT RIBS TO INSTALL OR REMOVE THE SHAFT AS THIS CAN CAUSE DAMAGE TO THE SUPPORT RIBS.

**CAUTION:** MAKE SURE THAT THE PARTS, LUBRICANT, AND CORROSION INHIBITING COMPOUND ARE CLEAN. CONTAMINATION ON THE PARTS CAN CAUSE DAMAGE TO THE MATING SURFACES.

Refer to APPENDIX A bearing damage definitions and asuggested worksheet to record thecondition of the removed bearings 2 60B00178-23 Bearing Remove 3

or any other bearing that meets Boeing specifications S113T134-1 2 SB-1131 BEARING, SPHERI-CAL ROLLER, AIRFRAME, INCH Install (New)

(a) (b) (c) (d) 1

- Bushing Clean 4 (d) 1

- Shaft Clean (d) 1

- Crank arm assy Clean (d) 1

- Rib Doubler Clean (d) 1

- Bearing Retainer Clean (e)

- BMS3-38 Corrosion Inhibiting Compound Apply 5

**FIGURE 6: REPLACE THE TRAILING EDGE FLAP SUPPORT BEARINGS AT THE TE FLAP SUPPORT RIB ASSEMBLY IN FLAP POSITION 2**  **(SHEET 2 OF 3)**
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: February 12, 2013 767-27A0227 67 of 78 **BOEING SERVICE BULLETIN 767-27A0227 ALERT**  **ALERT More Data**  **Qty Identification**  **Name Task**  **Step**

- - Bushing Install (Kept) 6 (f) (g) 1

- TE Flap support rib as- sembly Identify 7 (a) Install with BMS3-33 grease. (b) Refer to Boeing tool kit drawing 0A-27128 for suggested shaft removal/installation and spanner wrench tools. Use tool to push the end of the shaft, the crank arm, and the bushing together. (c) You can tap the shaft with a light mallet to help align the bearing to the shaft during bearing installation. Refer to Boeing tool kit drawing 0A-27128 for suggested bearing installation tool. (d) Clean off grease and, if present, Mastinox compound. Refer to SOPM 20-30-03. (e) Apply corrosion-inhibiting compound to surfaces of cavities and splines that make contact between the shaft and the crank arm. Wipe off squeeze-out with dry wiper. (f) Refer to Paragraph 2.C.3., Parts Modified and Reidentified for existing and new part numbers. (g) Repart mark the TE Flap support rib assembly. Refer to SOPM 20-50-10.

**FIGURE 6: REPLACE THE TRAILING EDGE FLAP SUPPORT BEARINGS AT THE TE FLAP SUPPORT RIB ASSEMBLY IN FLAP POSITION 2**  **(SHEET 3 OF 3)**
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: February 12, 2013 767-27A0227 68 of 78 **BOEING SERVICE BULLETIN 767-27A0227 ALERT**  **ALERT This Figure applies only to: Group 1-3, Configuration 2.** 

**FIGURE 7: REPLACE THE TRAILING EDGE FLAP SUPPORT BEARINGS AT THE TE FLAP SUPPORT RIB ASSEMBLY IN FLAP POSITION 7**  **(SHEET 1 OF 3)**
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: February 12, 2013 767-27A0227 69 of 78 **BOEING SERVICE BULLETIN 767-27A0227 ALERT**  **ALERT**The step numbers shown below agree with the numbers shown in the circle symbols in the figure. The QTY numbers shown below are the number of parts necessary for each TE Flap support rib.
**More Data Qty**  **Identification Name**  **Task Step**  (b) 1

- Bushing Remove / Keep 1 **CAUTION:** MAKE A NOTE OF THE SEAL ORIENTATION. DURING INSTALLATION, THE SEAL MUST BE CORRECTLY ORIENTED TO AVOID BEARING DAMAGE DUE TO LACK OF LUBRICATION.

4 113T1256-31 Seal Remove 2 with wet primer BMS10-11 4 113T1256-31 SEAL Install (New)

**CAUTION:** DO NOT HIT THE ENDS OF THE SHAFT WHEN YOU REMOVE OR INSTALL THE SHAFT ON THE SUPPORT RIBS AS THIS CAN APPLY FORCES ON THE BEARING INNER RACE AND CAUSE DAMAGE TO THE BEARINGS.

**CAUTION:** DO NOT APPLY FORCE ON THE SUPPORT RIBS TO INSTALL OR REMOVE THE SHAFT AS THIS CAN CAUSE DAMAGE TO THE SUPPORT RIBS.

**CAUTION:** MAKE SURE THAT THE PARTS, LUBRICANT, AND CORROSION INHIBITING COMPOUND ARE CLEAN. CONTAMINATION ON THE PARTS CAN CAUSE DAMAGE TO THE MATING SURFACES.

Refer to APPENDIX A bearing damage definitions and asuggested worksheet to record thecondition of the removed bearings 2 60B00178-23 Bearing Remove 3

or any other bearing that meets Boeing specifications S113T134-1 2 SB-1131 BEARING, SPHERI-CAL ROLLER, AIRFRAME, INCH Install (New)

(a) (b) (c) (d) 1

- Bushing Clean 4 (d) 1

- Shaft Clean (d) 1

- Crank arm assy Clean (d) 1

- Rib Doubler Clean (d) 1

- Bearing Retainer Clean (e)

- BMS3-38 Corrosion Inhibiting Compound Apply 5

**FIGURE 7: REPLACE THE TRAILING EDGE FLAP SUPPORT BEARINGS AT THE TE FLAP SUPPORT RIB ASSEMBLY IN FLAP POSITION 7**  **(SHEET 2 OF 3)**
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: February 12, 2013 767-27A0227 70 of 78 **BOEING SERVICE BULLETIN 767-27A0227 ALERT**  **ALERT More Data**  **Qty Identification**  **Name Task**  **Step**

- - Bushing Install (Kept) 6 (f) (g) 1

- TE Flap support rib as- sembly Identify 7 (a) Install with BMS3-33 grease. (b) Refer to Boeing tool kit drawing 0A-27128 for suggested shaft removal/installation and spanner wrench tools. Use tool to push the end of the shaft, the crank arm, and the bushing together. (c) You can tap the shaft with a light mallet to help align the bearing to the shaft during bearing installation. Refer to Boeing tool kit drawing 0A-27128 for suggested bearing installation tool. (d) Clean off grease and, if present, Mastinox compound. Refer to SOPM 20-30-03. (e) Apply corrosion-inhibiting compound to surfaces of cavities and splines that make contact between the shaft and the crank arm. Wipe off squeeze-out with dry wiper. (f) Refer to Paragraph 2.C.3., Parts Modified and Reidentified for existing and new part numbers. (g) Repart mark the TE Flap support rib assembly. Refer to SOPM 20-50-10.

**FIGURE 7: REPLACE THE TRAILING EDGE FLAP SUPPORT BEARINGS AT THE TE FLAP SUPPORT RIB ASSEMBLY IN FLAP POSITION 7**  **(SHEET 3 OF 3)**
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: February 12, 2013 767-27A0227 71 of 78 **BOEING SERVICE BULLETIN 767-27A0227 ALERT**  **ALERT This Figure applies only to: Group 1-3, Configuration 2.** 

**FIGURE 8: REPLACE THE TRAILING EDGE FLAP SUPPORT BEARINGS AT THE TE FLAP SUPPORT RIB ASSEMBLY IN FLAP POSITION 8**  **(SHEET 1 OF 3)**
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: February 12, 2013 767-27A0227 72 of 78 **BOEING SERVICE BULLETIN 767-27A0227 ALERT**  **ALERT**The step numbers shown below agree with the numbers shown in the circle symbols in the figure. The QTY numbers shown below are the number of parts necessary for each TE Flap support rib.
**More Data Qty**  **Identification Name**  **Task Step**  (b) 1

- Bushing Remove / Keep 1 **CAUTION:** MAKE A NOTE OF THE SEAL ORIENTATION. DURING INSTALLATION, THE SEAL MUST BE CORRECTLY ORIENTED TO AVOID BEARING DAMAGE DUE TO LACK OF LUBRICATION.

4 113T1256-31 Seal Remove 2 with wet primer BMS10-11 4 113T1256-31 SEAL Install (New)

**CAUTION:** DO NOT HIT THE ENDS OF THE SHAFT WHEN YOU REMOVE OR INSTALL THE SHAFT ON THE SUPPORT RIBS AS THIS CAN APPLY FORCES ON THE BEARING INNER RACE AND CAUSE DAMAGE TO THE BEARINGS.

**CAUTION:** DO NOT APPLY FORCE ON THE SUPPORT RIBS TO INSTALL OR REMOVE THE SHAFT AS THIS CAN CAUSE DAMAGE TO THE SUPPORT RIBS.

**CAUTION:** MAKE SURE THAT THE PARTS, LUBRICANT, AND CORROSION INHIBITING COMPOUND ARE CLEAN. CONTAMINATION ON THE PARTS CAN CAUSE DAMAGE TO THE MATING SURFACES.

Refer to APPENDIX A bearing damage definitions and asuggested worksheet to record thecondition of the removed bearings 2 60B00178-23 Bearing Remove 3

or any other bearing that meets Boeing specifications S113T134-1 2 SB-1131 BEARING, SPHERI-CAL ROLLER, AIRFRAME, INCH Install (New)

(a) (b) (c) (d) 1

- Bushing Clean 4 (d) 1

- Shaft Clean (d) 1

- Crank arm assy Clean (d) 1

- Rib Doubler Clean (d) 1

- Bearing Retainer Clean (e)

- BMS3-38 Corrosion Inhibiting Compound Apply 5

**FIGURE 8: REPLACE THE TRAILING EDGE FLAP SUPPORT BEARINGS AT THE TE FLAP SUPPORT RIB ASSEMBLY IN FLAP POSITION 8**  **(SHEET 2 OF 3)**
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: February 12, 2013 767-27A0227 73 of 78 **BOEING SERVICE BULLETIN 767-27A0227 ALERT**  **ALERT More Data**  **Qty Identification**  **Name Task**  **Step**

- - Bushing Install (Kept) 6 (f) (g) 1

- TE Flap support rib as- sembly Identify 7 (a) Install with BMS3-33 grease. (b) Refer to Boeing tool kit drawing 0A-27128 for suggested shaft removal/installation and spanner wrench tools. Use tool to push the end of the shaft, the crank arm, and the bushing together. (c) You can tap the shaft with a light mallet to help align the bearing to the shaft during bearing installation. Refer to Boeing tool kit drawing 0A-27128 for suggested bearing installation tool. (d) Clean off grease and, if present, Mastinox compound. Refer to SOPM 20-30-03. (e) Apply corrosion-inhibiting compound to surfaces of cavities and splines that make contact between the shaft and the crank arm. Wipe off squeeze-out with dry wiper. (f) Refer to Paragraph 2.C.3., Parts Modified and Reidentified for existing and new part numbers. (g) Repart mark the TE Flap support rib assembly. Refer to SOPM 20-50-10.

**FIGURE 8: REPLACE THE TRAILING EDGE FLAP SUPPORT BEARINGS AT THE TE FLAP SUPPORT RIB ASSEMBLY IN FLAP POSITION 8**  **(SHEET 3 OF 3)**
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: February 12, 2013 767-27A0227 74 of 78 **BOEING SERVICE BULLETIN 767-27A0227 ALERT**  **ALERT This Figure applies only to: Group 1, 3, Configuration 1.** 

The step numbers shown below agree with the numbers shown in the circle symbols in the figure. The QTY numbers shown below are the number of parts necessary for each TE Flap support rib.
**More Data Qty**  **Identification Name**  **Task Step**  (a) (b)

- - TE Flap support rib as- sembly Identify 1 (a) Repart mark the applicable TE Flap support rib assembly in Flap Positions 1, 2, 7 and 8. Refer to SOPM 20-50-10. (b) Refer to Paragraph 2.C.3., Parts Modified and Reidentified for existing and new part numbers.

**FIGURE 9: RE-IDENTIFY THE TRAILING EDGE (TE) FLAP SUPPORT RIB ASSEMBLY FOR APPLICABLE FLAP POSITIONS WITH CORRECT NEW PART NUMBERS**  **(SHEET 1 OF 1)**
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: February 12, 2013 767-27A0227 75 of 78 **BOEING SERVICE BULLETIN 767-27A0227 ALERT**  **ALERT This Appendix applies only to: Group 1-3, Configuration 2.**  If damage is found in Trailing Edge (TE) Flap support bearings for Positions 1, 2, 7 or 8, find if the TE rotary actuator(s) at the Flap Positions 1, 2, 7, or 8 are serviceable or if they need to be overhauled or replaced. The actuator may be used “as-is", it may have to be overhauled, or it may have to be replaced by a new or a spare unit, depending on the TE Flap support bearings damage, as defined below. **TABLE 1: BEARING FACE DAMAGE TYPE DEFINITIONS, NEEDED TO FIND IF THE TE ROTARY ACTUATOR(S) AT FLAP POSITIONS 1, 2, 7 or 8 ARE SER**  **VICEABLE OR IF THEY NEED TO BE OVERHAULED OR REPLACED Description**  **Bearing Face Damage Type**  A "good" Rexnord bearing face has no signs of damage. All McGill bearings are considered good bearings. Good

A "slightly damaged" bearing faceis detected by finding up to 10 migrated or missing rollers in the bearing face. Slightly damaged

A "moderately damaged" bearing face is detected by finding more than 10 migrated or missing rollers in the bearing face.Moderately damaged

A "fractured" bearing face is detected by finding damage on the bearing race or the bearing spacer, metal wear debris inside and around the bearing, and possibly in the bearing grease, and bearing abrasion. A fractured bearing will likely also have loose, migrated, or missing rollers. Fractured

**APPENDIX A: BEARING DAMAGE DEFINITIONS AND SUGGESTED WORKSHEET TO RECORD THE CONDITION OF THE REMOVED BEARINGS**  **(SHEET 1 OF 3)**
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: February 12, 2013 767-27A0227 76 of 78 **BOEING SERVICE BULLETIN 767-27A0227 ALERT**  **ALERT TABLE 2: TRAILING EDGE FLAP SUPPORT RIBS DAMAGED BEARINGS COMBINATIONS**  **Other Bearing at the TE Flap support rib assembly**  **Either Bearing at the TE Flap support rib assembly**  **TE Flap Support Bearings Damage**  **Type / Bearing Combination**  **Quantity of Moder ately Damaged or**  **Fractured Bearing Faces**  **Quantity of Good or Slightly Damaged**  **Bearing Faces Quantity of Moder**  **ately Damaged or Fractured Bearing**  **Faces Quantity of Good or**  **Slightly Damaged Bearing Faces** 

0 or 1 2 or 1 0 or 1 2 or 1 CONDITION 1:The two bearings at the TE Flap support rib assembly have at least one face eachthat meets the definitions of good or slightly damaged bearing face 2 0 0 or 1 2 or 1 CONDITION 2: Only one bearing at the TE Flap support rib assembly has at least one face that meets the definition of good or slightly damaged bearingface. The other bearing at the same TE Flap support rib has faces that meet thedefinitions of moderately damaged or fractured bearing face 2 0 2 0 CONDITION 3:The two bearings at the TE Flap support rib assembly have all faces that meet thedefinitions of moderately damaged or fractured bearing face Suggested data sheet for operator to record inspection results and bearing conditions, if desired for record keeping.

**APPENDIX A: BEARING DAMAGE DEFINITIONS AND SUGGESTED WORKSHEET TO RECORD THE CONDITION OF THE REMOVED BEARINGS**  **(SHEET 2 OF 3)**
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: February 12, 2013 767-27A0227 77 of 78 **BOEING SERVICE BULLETIN 767-27A0227 ALERT**  **ALERT APPENDIX A: BEARING DAMAGE DEFINITIONS AND SUGGESTED WORKSHEET TO RECORD THE**  **CONDITION OF THE REMOVED BEARINGS (SHEET 3 OF 3)** 
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: February 12, 2013 767-27A0227 78 of 78 **BOEING SERVICE BULLETIN 767-27A0227 ALERT**  **ALERT**