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Commercial Airplanes 747 Service Bulletin ALERT Number: 747-27A2506 Original Issue: February 03, 2014 ATA System: 2709 SUBJECT: FLIGHT CONTROLS - Flight Controls Electronics - Lateral Control Electronic Module 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.
9E991ECCN:
BOEING PROPRIETARY, CONFIDENTIAL AND/OR TRADE SECRET Copyright © 2014 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Unpublished Work.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: February 03, 2014 747-27A2506 1 of 18
3.0
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: February 03, 2014 747-27A2506 2 of 18 BOEING SERVICE BULLETIN 747-27A2506
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BLANK PAGE
Table of Contents
Summary5
1. PLANNING INFORMATION9
A. Effectivity9
1. Airplanes9
2. Spares Affected ........................................ 1 0 B. Concurrent Requirements ...................................... 1 0 C. Reason ................................................ 1 0 D. Description .............................................. 1 1 E. Compliance .............................................. 1 1 F. Approval ............................................... 1 1 G. Manpower .............................................. 1 2 H. Weight and Balance Changes .................................... 1 2 I. Electrical Load Data ......................................... 1 2 J. References .............................................. 1 2
1. Existing Data: ......................................... 1 2
2. Data Supplied with this Service Bulletin: ........................... 1 3
3. Installation Drawings Used in the Preparation of this Service Bulletin: ........... 1 3 K. Publications Affected ........................................ 1 3 L. Interchangeability and Intermixability of Parts ........................... 1 3 M. Software Accomplishment Summary ................................ 1 3
2. MATERIAL INFORMATION ........................................ 1 5 A. Material - Price and Availability ................................... 1 5 B. Industry Support Information .................................... 1 5 C. Parts Necessary for Each Airplane ................................. 1 5
1. Kits/Parts ............................................ 1 5
2. Parts and Materials Supplied by the Operator ........................ 1 5
3. Parts Modified and Reidentified ................................ 1 5
4. Parts Removed and Not Replaced .............................. 1 6 D. Parts Necessary to Change Spares ................................. 1 6 E. Special Tooling - Price and Availability ............................... 1 6 F. Special Tooling Necessary to do this Service Bulletin ....................... 1 6
3. ACCOMPLISHMENT INSTRUCTIONS .................................. 1 7 A. GENERAL INFORMATION ..................................... 1 7 B. WORK INSTRUCTIONS ....................................... 1 8 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: February 03, 2014 747-27A2506 3 of 18 BOEING SERVICE BULLETIN 747-27A2506
ALERTALERT
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: February 03, 2014 747-27A2506 4 of 18 BOEING SERVICE BULLETIN 747-27A2506
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Commercial Airplanes 747 Service Bulletin ALERT SummaryNumber: 747-27A2506Original Issue: February 03, 2014 ATA System: 2709 SUBJECT: FLIGHT CONTROLS - Flight Controls Electronics - Lateral Control Electronic Module 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 This service bulletin provides instructions to replace the existing Lateral Control Electronic (LCE) modules with new LCE modules with revised software. There are two (2) LCE modules that each operate six (6) spoiler Power Control Units (PCUs) and two (2) outboard aileron PCUs. If the existing LCE modules are not replaced, there is a possibility for divergent flutter or unacceptable vibration for certain parts of the flight envelope. Divergent flutter could result in loss of controllability of the airplane.
Boeing observed an airplane had experienced a large 2.3 Hertz (Hz) vibration during a steady turn at 1.8 g-force
(g) load factor during developmental flight testing. Boeing determined that the solution to this problem should be extended to all 747-8 and 747-8F airplanes. No operators have reported any divergent flutter or unacceptable vibration in service.
The existing LCE modules have a control system architecture that allows symmetric outboard spoiler (positions 1 or 2 and 11 or 12) deflections more than six (6) degrees. Deflections above six (6) degrees can adversely affect the airplane flutter stability during high g maneuvers in certain parts of the flight envelope.
The new LCE modules have a control system architecture that will limit the symmetric outboard spoiler deflections to six (6) degrees. Additional changes were made to increase the LCE module's capabilities and decrease nuisance messages during electrical power transitions.
Boeing Service Related Problem (SRP) 747-8-SRP-27-0234 is related to this service bulletin.
Boeing Fleet Team Digest (FTD) 747 FTD 27-13008 is related to this service bulletin.
This table is provided to operators for planning purposes only. Refer to the applicable sections for more information.
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: February 03, 2014 747-27A2506 5 of 18
ReferenceAffectedPlanning Data Paragraph 1.A.2., Spares AffectedYesSpares Affected Paragraph 1.E., Compliance and Paragraph
1.F., Approval YesAD Related Paragraph 1.H., Weight and Balance ChangesNoWeight and Balance Change Paragraph 1.I., Electrical Load DataNoElectrical Load Changed Paragraph 1.K., Publications AffectedYesPublications Affected Paragraph 1.K., Publications AffectedNoAirplane Flight Operations Affected (Flight Crew Operations Manual and/or FAA Approved Airplane Flight Manual) Paragraph 2.C.1., Kits/PartsNoKits/Parts Required Paragraph 2.C.2., Parts and Materials Supplied by the Operator YesOperator Supplied Parts/Material Paragraph 2.F., Special Tooling Necessary to do this Service Bulletin NoSpecial Tooling Required ACTION (PRR 86601-2)
1. Open access to the Main Equipment Center (MEC).
2. Remove the two (2) LCE modules.
3. Adjust the polarization post of the electrical connectors on the E1-2 and E2-2 shelves.
4. Change the part number on each changed electrical connector.
5. Install the new LCE modules, part number CA49253-003.
6. Do the LCE module operational test.
7. Close access to the MEC.
8. Put the airplane back to a serviceable condition.
EFFECTIVITY 747-8 and 747-8F Airplanes. 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.
Boeing recommends that the change given in this service bulletin be done within 12 months after the original issue date of this service bulletin.
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: February 03, 2014 747-27A2506 6 of 18 BOEING SERVICE BULLETIN 747-27A2506
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INDUSTRY SUPPORT INFORMATION Boeing warranty remedies are available for airplanes in warranty as of July 11, 2011. Please refer to Paragraph
2.B., Industry Support Information. The warranty remedies will expire eight years from the original issue date of this service bulletin.
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 03, 2014 747-27A2506 7 of 18 BOEING SERVICE BULLETIN 747-27A2506
ALERTALERT
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: February 03, 2014 747-27A2506 8 of 18 BOEING SERVICE BULLETIN 747-27A2506
ALERTALERT
BLANK PAGE
Commercial Airplanes 747 Service Bulletin ALERT Number: 747-27A2506 Original Issue: February 03, 2014 ATA System: 2709 SUBJECT: FLIGHT CONTROLS - Flight Controls Electronics - Lateral Control Electronic Module 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. An equivalent change is on subsequent production airplanes. Refer to PRR 86601-2 for data about this change.
Refer to Service Bulletin Index D6-30300 Part 3 for Airplane Variable Number, Line Number, and Serial Number data.
NOTE: Variable numbers for airplanes scheduled to be delivered more than a year after the Original Issue date of this service bulletin are not listed in the table below. MyBoeingFleet (MBF) will show current listing of the affected airplanes.
NOTE: This service bulletin is for the airplanes shown in the effectivity list below. The effectivity list includes all affected airplanes scheduled to be delivered before DEC 02, 2014. In addition, at least one airplane scheduled to be delivered after DEC 02, 2014 is affected by this service bulletin and is in Group(s) 1 as described in the Group Configuration table.
Affected airplanes will be added to the service bulletin's MyBoeingFleet.com (MBF) "get effectivity" result when they are added to the MBF Fleet Profile Page.
DESCRIPTIONCONFIGURATIONGROUP 747-8 and 747-8F airplanes, lines numbers 1420 through 1434, and 1436 through 1491 -1 Airplane Models:
747-8, 747-8F Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: February 03, 2014 747-27A2506 9 of 18
GroupVariable Number 1RC001 - RC008 1RC022 - RC030 1RC501 - RC511 1RC521 - RC528 1RC541 1RC546 - RC549 1RC551 - RC563 1RC571 - RC572 1RC574 - RC582 1RC601 - RC605
2. Spares Affected Examine your spares supply for the parts or components identified below. If any parts or components are found, refer to Paragraph 2.C.2., Parts and Materials Supplied by the Operator, for the recommended action.
Part Number CA49253-001 CA49253-002 B. Concurrent Requirements None.
C. Reason This service bulletin provides instructions to replace the existing Lateral Control Electronic (LCE) modules with new LCE modules with revised software. There are two (2) LCE modules that each operate six (6) spoiler Power Control Units (PCUs) and two (2) outboard aileron PCUs. If the existing LCE modules are not replaced, there is a possibility for divergent flutter or unacceptable vibration for certain parts of the flight envelope. Divergent flutter could result in loss of controllability of the airplane.
Boeing observed an airplane had experienced a large 2.3 Hertz (Hz) vibration during a steady turn at
1.8 g-force (g) load factor during developmental flight testing. Boeing determined that the solution to this problem should be extended to all 747-8 and 747-8F airplanes. No operators have reported any divergent flutter or unacceptable vibration in service.
The existing LCE modules have a control system architecture that allows symmetric outboard spoiler (positions 1 or 2 and 11 or 12) deflections more than six (6) degrees. Deflections above six (6) degrees can adversely affect the airplane flutter stability during high g maneuvers in certain parts of the flight envelope.
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: February 03, 2014 747-27A2506 10 of 18 BOEING SERVICE BULLETIN 747-27A2506
ALERTALERT
The new LCE modules have a control system architecture that will limit the symmetric outboard spoiler deflections to six (6) degrees. Additional changes were made to increase the LCE module's capabilities and decrease nuisance messages during electrical power transitions.
Boeing Service Related Problem (SRP) 747-8-SRP-27-0234 is related to this service bulletin.
Boeing Fleet Team Digest (FTD) 747 FTD 27-13008 is related to this service bulletin.
D. Description
1. Open access to the Main Equipment Center (MEC).
2. Remove the two (2) LCE modules.
3. Adjust the polarization post of the electrical connectors on the E1-2 and E2-2 shelves.
4. Change the part number on each changed electrical connector.
5. Install the new LCE modules, part number CA49253-003.
6. Do the LCE module operational test.
7. Close access to the MEC.
8. Put the airplane back to a serviceable condition.
The work in this service bulletin is done in the maintenance zone(s) given below.
Affected Maintenance Zones ZoneModel 117, 118747-8, 747-8F 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.
Boeing recommends that the replacement given in this service bulletin be done within 12 months after the original issue date of this service bulletin.
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 03, 2014 747-27A2506 11 of 18 BOEING SERVICE BULLETIN 747-27A2506
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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 The table below shows an estimate of the task hours necessary to do this change for each airplane.
This estimate is for direct labor only, done by an experienced crew. Adjust the estimate with operator task hour data if necessary. The estimate does not include lost time. These are some examples of lost time:
Time to adjust to the workplace Time to schedule the work Time to inspect the work Time to cure the materials Time to make the parts Time to find the tools.
Elapsed HoursTask HoursNumber of PersonsTask
1.001.001Open Access
0.500.501Install
1.001.001Close Access
1.251.251Test
3.753.75TOTAL FOR EACH AIRPLANE H. Weight and Balance Changes None.
I. Electrical Load Data Not changed.
J. References
1. Existing Data:
a. Engineering Change Memo PRR 86601-2
b. Boeing Service Related Problem (SRP) 747-8-SRP-27-0234
c. Service Bulletin Index D6-30300
d. Standard Wiring Practices Manual (SWPM) 20-71-14
e. 747 Fleet Team Digest (FTD) 27-13008
f. 747-8 Aircraft Maintenance Manual (AMM) 27-09-01 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: February 03, 2014 747-27A2506 12 of 18 BOEING SERVICE BULLETIN 747-27A2506