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Commercial Airplanes 757 Requirements Bulletin ALERT Number: 757-27A0159 RB Original Issue: March 29, 2019 ATA System: 2711 SUBJECT: FLIGHT CONTROLS - Aileron and Aileron Trim Control System - Aileron Trim Actuator Bearing Rotation Check and Attachment Lug Inspections 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.
9E991ECCN:
Copyright © 2019 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Unpublished Work.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, Dreamliner, BBJ, DC-8, DC-9, DC-10, KC-10, KC-46, KDC-10, MD-10, MD-11, MD-80, MD-88, MD-90, P-8, 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.
Original Issue: March 29, 2019 757-27A0159 RB 1 of 19
3.0
Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details.
Original Issue: March 29, 2019 757-27A0159 RB 2 of 19 REQUIREMENTS BULLETIN 757-27A0159
ALERTALERT
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Table of Contents
1. EFFECTIVITY5
A. Airplanes5
B. Spares Affected5
2. CONCURRENT REQUIREMENTS5
3. COMPLIANCE5
4. APPROVAL8
5. ACCOMPLISHMENT INSTRUCTIONS9
A. General Information9
B. Work Instructions10
FIGURE 2: MAIN LANDING GEAR WHEEL WELL - AILERON TRIM ACTUATOR BEARING - ROTATION
CHECK14
FIGURE 3: MAIN LANDING GEAR WHEEL WELL - AILERON TRIM ACTUATOR ATTACHMENT LUG -
DETAILED INSPECTION16
FIGURE 4: MAIN LANDING GEAR WHEEL WELL - AILERON TRIM ACTUATOR ATTACHMENT LUG -
HIGH FREQUENCY EDDY CURRENT (HFEC) INSPECTION18
Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details.
Original Issue: March 29, 2019 757-27A0159 RB 3 of 19 REQUIREMENTS BULLETIN 757-27A0159
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Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details.
Original Issue: March 29, 2019 757-27A0159 RB 4 of 19 REQUIREMENTS BULLETIN 757-27A0159
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BLANK PAGE
Commercial Airplanes 757 Requirements Bulletin ALERT Number: 757-27A0159 RB Original Issue: March 29, 2019 ATA System: 2711 SUBJECT: FLIGHT CONTROLS - Aileron and Aileron Trim Control System - Aileron Trim Actuator Bearing Rotation Check and Attachment Lug Inspections
THIS DOCUMENT 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 DOCUMENT TO THE NEW OPERATOR. IF APPLICABLE SPARES HAVE BEEN SOLD, SEND THIS DOCUMENT TO THE NEW OWNER. THIS IS AN ENHANCED REQUIRED FOR COMPLIANCE DOCUMENT. THE BOEING
PROCESSES USED TO CREATE THE SERVICE BULLETIN (SB) AND THE REQUIREMENTS BULLETIN (RB) ENSURE THAT THE INFORMATION BETWEEN "RC START" AND "RC END" IN THE SB ARE IDENTICAL TO THE INFORMATION IN THE SAME SECTIONS (COMPLIANCE, WORK INSTRUCTIONS…) OF THE RB WHICH THE SB REFERS TO AS THE RELATED DOCUMENT.
1. EFFECTIVITY A. Airplanes This bulletin is applicable to 757-200, 757-200CB, 757-200PF, 757-300 Airplane(s), line number(s) 1-1050 in 1 Group(s).
B. Spares Affected Examine your spares supply for the parts or components identified below. If any parts or components are found, refer to the Accomplishment Instructions for the recommended action.
NamePart Number AILERON TRIM ACTUATOR60B80030-3 OR -4 (SHIMADZU PART NUMBER 732-16810-01 OR -03)
2. CONCURRENT REQUIREMENTS None.
3. COMPLIANCE The Federal Aviation Administration (FAA) will possibly release an additional Airworthiness Directive related to Requirements Bulletin 757-27A0159 RB. The Airworthiness Directive will make the compliance tasks and times given in Requirements Bulletin 757-27A0159 RB mandatory.
Accomplish the required actions, based on the applicable conditions in Tables 1 and 2 in accordance with the Accomplishment Instructions.
Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details.
Original Issue: March 29, 2019 757-27A0159 RB 5 of 19
When more than one OPTION is given for a CONDITION, do only one of the OPTION numbers. When more than one ACTION is given for a CONDITION or an OPTION, do all of the ACTION numbers for that CONDITION or OPTION.
Table 1: Aileron Trim Actuator Bearing Rotation Check Repeat Interval (Not to Exceed) Compliance TimeActionCondition -Within 1,760 Flight Hours after the original issue date of the Requirements Bulletin 757- 27A0159 RB.
Do an Aileron Trim Actuator bearing rotation check to make sure it turns freely. (a) All Airplanes -Before further flight.
Do a HFEC inspection of the Aileron Trim Actuator attachment lug for any crack. (c) CONDITION 1: BEARING
DOES NOT TURN FREELY.
-Before further flight.
CONDITION 1.1 (AC- TION 1): Contact the Boeing Company for repair instructions and do the repair.
CONDITION 1.1: ANY
CRACK IS FOUND DUR-
ING THE HFEC INSPEC-
TION OF THE AILERON
TRIM ACTUATOR AT- TACHMENT LUG -Before further flight.
CONDITION 1.1 (AC- TION 2): Replace the Aileron Trim Actuator with a new or serviceable part.
(b) 1,100 Flight Hours.-CONDITION 1.1 (AC- TION 3): Repeat Aileron Trim Actuator bearing rotation check to make sure it turns freely. (a) -.Before further flight.
CONDITION 1.2 (AC- TION 1): Replace the Aileron Trim Actuator with a new or serviceable part.
(b) CONDITION 1.2: NO
CRACK IS FOUND DUR-
ING THE HFEC INSPEC-
TION OF THE AILERON
TRIM ACTUATOR AT- TACHMENT LUG 1,100 Flight Hours.-CONDITION 1.2 (AC- TION 2): Repeat Aileron Trim Actuator bearing rotation check to make sure it turns freely. (a) 1,100 Flight Hours.-Repeat Aileron Trim Actuator bearing rotation check to make sure it turns freely. (a) CONDITION 2: BEARING TURNS FREELY.
Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details.
Original Issue: March 29, 2019 757-27A0159 RB 6 of 19 REQUIREMENTS BULLETIN 757-27A0159
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Table 1: Aileron Trim Actuator Bearing Rotation Check Repeat Interval (Not to Exceed) Compliance TimeActionCondition
(a) A bearing that turns freely is defined as: A bearing that moves without ratchet, gritty, or detent like feeling.
(b) The existing Aileron Trim Actuator can be replaced with a new or serviceable Aileron Trim Actuator. A serviceable Aileron Trim Actuator is one with a bearing that turns freely.
(c) If a HFEC inspection of the Aileron Trim Actuator attachment lug for any crack is found to be required as an action for both CONDITION 1 and CONDITION 3, the HFEC inspection is only required to be done once before further flight.
Table 2: Detailed Inspection of the Aileron Trim Actuator Attachment Lug Repeat Interval (Not to Exceed) Compliance TimeActionCondition -Within 1,760 Flight Hours after the original issue date of the Requirements Bulletin 757- 27A0159 RB.
Do a Detailed Inspection of the Aileron Trim Actuator attachment lug for any damage and any crack.
(a) All Airplanes -Before further flight.
Do a HFEC inspection of the Aileron Trim Actuator attachment lug for any crack. (b) CONDITION 3: ANY DAM-
AGE OR ANY CRACK IS
FOUND DURING THE
DETAILED INSPECTION
OF THE AILERON TRIM
ACTUATOR ATTACH-
MENT LUG -Before further flight.
CONDITION 3.1 (AC- TION 1): Contact the Boeing Company for repair instructions and do the repair.
CONDITION 3.1: ANY
CRACK IS FOUND DUR-
ING THE HFEC INSPEC-
TION OF THE AILERON
TRIM ACTUATOR AT- TACHMENT LUG 1,100 Flight Hours.-CONDITION 3.1 (AC- TION 2): Repeat Detailed Inspection of the Aileron Trim Actuator attachment lug for any damage and any crack. (a) 1,100 Flight Hours.-Repeat Detailed Inspection of the Aileron Trim Actuator attachment lug for any damage and any crack. (a) CONDITION 3.2: NO
CRACK IS FOUND DUR-
ING THE HFEC INSPEC-
TION OF THE AILERON
TRIM ACTUATOR AT-
TACHMENT LUG Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details.
Original Issue: March 29, 2019 757-27A0159 RB 7 of 19 REQUIREMENTS BULLETIN 757-27A0159
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Table 2: Detailed Inspection of the Aileron Trim Actuator Attachment Lug Repeat Interval (Not to Exceed) Compliance TimeActionCondition 1,100 Flight Hours.-Repeat Detailed Inspection of the Aileron Trim Actuator attachment lug for any damage and any crack. (a) CONDITION 4: NO DAM-
AGE AND NO CRACK IS
FOUND DURING THE
DETAILED INSPECTION
OF THE AILERON TRIM
ACTUATOR ATTACH-
MENT LUG
(a) Damage is defined as: Any surface problems, such as scratches or dings, which have occurred after the part was manufactured.
(b) If a HFEC inspection of the Aileron Trim Actuator attachment lug for any crack is found to be required as an action for both CONDITION 1 and CONDITION 3, the HFEC inspection is only required to be done once before further flight.
4. APPROVAL This Requirements Bulletin was examined by the Federal Aviation Administration (FAA). The changes specified in this document comply with the applicable regulations and are FAA approved for the airplanes listed in the service bulletin effectivity. This document and its approval were based on the airplane in its original Boeing delivery configuration or as modified by other approved Boeing changes.
If an airplane has a non-Boeing modification or repair that affects a component or system also affected by this Requirements Bulletin, the operator is responsible for obtaining appropriate regulatory agency approval before incorporating this Requirements Bulletin.
Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details.
Original Issue: March 29, 2019 757-27A0159 RB 8 of 19 REQUIREMENTS BULLETIN 757-27A0159
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5. ACCOMPLISHMENT INSTRUCTIONS A. GENERAL INFORMATION NOTE: 1. This is an Enhanced Required for Compliance document. There will be a separate Service Bulletin (SB) and a separate Requirements Bulletin (RB). If an RB is mandated by an Airworthiness Directive (AD), then all applicable requirements specified in the RB must be done. For the related SB, some locations are marked RC Start and RC End to identify the requirements that are restated from the RB. For the related SB, the areas between RC Start and RC End, including sub-steps and any figures identified between RC Start and RC End, must be done to comply with the AD.
Therefore, an Alternative Method of Compliance (AMOC) is required for any deviations to steps between RC Start and RC End, including substeps and identified figures.
For the related SB, the steps not between RC Start and RC End may be deviated from using accepted methods in accordance with the operator's maintenance or inspection program without obtaining approval of an AMOC; this is provided that the steps between RC Start and RC End, including sub-steps and identified figures, can still be done as specified, and the airplane can be put back in an airworthy condition.
Figures not required for compliance are omitted from the RB.
2. This is an Enhanced Required for Compliance document. The Boeing processes used to create the Service Bulletin (SB) and the Requirements Bulletin (RB) ensure that the information between "RC Start" and "RC End" in the SB are identical to the information in the same sections (Compliance, Work Instructions...) of the RB which the SB refers to as the related document.
3. The compliance times for the actions in WORK INSTRUCTIONS are in Compliance.
4. 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 Values:
— Values for structural fasteners are given in 757 Structural Repair Manual, Chapter 51.
— Values for airframe maintenance tasks are included in Chapter 20 of 757 Aircraft Maintenance Manual (AMM).
— Values for electrical maintenance tasks are included in Chapter 20 of Standard Wiring Practices Manual (SWPM).
— Values for engine maintenance tasks are included in Chapter 70 of 757 Aircraft Maintenance Manual (AMM).
— Non-standard torque values for maintenance tasks are included in the applicable installation step.
Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details.
Original Issue: March 29, 2019 757-27A0159 RB 9 of 19 REQUIREMENTS BULLETIN 757-27A0159
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5. 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.
6. When more than one OPTION is given for a CONDITION, do only one of the OPTION numbers. When more than one ACTION is given for a CONDITION or an OPTION, do all of the ACTION numbers for that CONDITION or OPTION.
7. 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. Refer to SOPM 20-50-01 for alternate full threaded fasteners (screws) needed for installation in this service bulletin.
8. The instructions in the 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.
9. 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.
10. A Detailed Inspection is defined as: An intensive examination of a specific item, installation or assembly to detect damage, failure or irregularity. This could include tactile assessment in which a component or assembly can be checked for tightness/security. Available lighting is normally supplemented with a direct source of good lighting at an intensity deemed appropriate. Inspection aids such as mirrors and magnifying lenses may be necessary. Surface cleaning and elaborate access procedures may be required.
11. Use the approved fastener, process and material substitutions in accordance with SRM Chapter 51.
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.
B. WORK INSTRUCTIONS Actions Required for Compliance:
1. Requirements Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details.
Original Issue: March 29, 2019 757-27A0159 RB 10 of 19 REQUIREMENTS BULLETIN 757-27A0159
ALERTALERT
Table 1: Aileron Trim Actuator Bearing Rotation Check Refer to the listed procedures in SB 757-27A0159 Original Issue or later approved revisions as an accepted procedure.
Method of Compliance ActionCondition Do PART 1:
PREPARATION -Do an Aileron Trim Actuator bearing rotation check to make sure it turns freely. (a) All Airplanes -FIGURE 2 -FIGURE 4Do a HFEC inspection of the Aileron Trim Actuator attachment lug for any crack. (c) CONDITION 1: BEARING
DOES NOT TURN FREELY --CONDITION 1.1 (AC- TION 1): Contact the Boeing Company for repair instructions and do the repair.
CONDITION 1.1: ANY
CRACK IS FOUND DUR-
ING THE HFEC INSPEC-
TION OF THE AILERON
TRIM ACTUATOR AT- TACHMENT LUG Do PART 2:
AILERON TRIM
ACTUATOR RE-
PLACEMENT -CONDITION 1.1 (AC- TION 2): Replace the Aileron Trim Actuator with a new or serviceable part.
(b) Do PART 3:
RESTORATION -- -FIGURE 2CONDITION 1.1 (AC- TION 3): Repeat Aileron Trim Actuator bearing rotation check to make sure it turns freely. (a) Do PART 2:
AILERON TRIM
ACTUATOR RE-
PLACEMENT -CONDITION 1.2 (AC- TION 1): Replace the Aileron Trim Actuator with a new or serviceable part.
(b) CONDITION 1.2: NO
CRACK IS FOUND DUR-
ING THE HFEC INSPEC-
TION OF THE AILERON
TRIM ACTUATOR AT- TACHMENT LUG Do PART 3:
RESTORATION -- -FIGURE 2CONDITION 1.2 (AC- TION 2): Repeat Aileron Trim Actuator bearing rotation check to make sure it turns freely. (a) Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details.
Original Issue: March 29, 2019 757-27A0159 RB 11 of 19 REQUIREMENTS BULLETIN 757-27A0159
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Table 1: Aileron Trim Actuator Bearing Rotation Check Refer to the listed procedures in SB 757-27A0159 Original Issue or later approved revisions as an accepted procedure.
Method of Compliance ActionCondition Do PART 3:
RESTORATION --CONDITION 2: BEARING
TURNS FREELY -FIGURE 2Repeat Aileron Trim Actuator bearing rotation check to make sure it turns freely. (a)
(a) A bearing that turns freely is defined as: A bearing that moves without ratchet, gritty, or detent like feeling.
(b) The existing Aileron Trim Actuator can be replaced with a new or serviceable Aileron Trim Actuator. A serviceable Aileron Trim Actuator is one with a bearing that turns freely.
(c) If a HFEC inspection of the Aileron Trim Actuator attachment lug for any crack is found to be required as an action for both CONDITION 1 and CONDITION 3, the HFEC inspection is only required to be done once before further flight.
Table 2: Detailed Inspection of the Aileron Trim Actuator Attachment Lug Refer to the listed procedures in SB 757-27A0159 Original Issue or later approved revisions as an accepted procedure.
Method of Compliance ActionCondition Do PART 1:
PREPARATION -Do a Detailed Inspection of the Aileron Trim Actuator attachment lug for any damage and any crack.
(a) All Airplanes -FIGURE 3 -FIGURE 4Do a HFEC inspection of the Aileron Trim Actuator attachment lug for any crack. (b) CONDITION 3: ANY DAM-
AGE OR ANY CRACK IS
FOUND DURING THE
DETAILED INSPECTION
OF THE AILERON TRIM
ACTUATOR ATTACH-
MENT LUG Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details.
Original Issue: March 29, 2019 757-27A0159 RB 12 of 19 REQUIREMENTS BULLETIN 757-27A0159