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Commercial Airplanes 747 Service Bulletin ALERT Number: 747-27A2515 Original Issue: August 23, 2013 ATA System: 2731 5520 SUBJECT: FLIGHT CONTROLS - Elevator Control System - Inboard Elevator Power Control Actuator (PCA) Installation - Inspection 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 © 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Unpublished Work.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, 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: August 23, 2013 747-27A2515 1 of 29
2.0
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: August 23, 2013 747-27A2515 2 of 29 BOEING SERVICE BULLETIN 747-27A2515
ALERTALERT
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 0 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 5 D. Parts Necessary to Change Spares ................................. 1 5 E. Special Tooling - Price and Availability ............................... 1 5 F. Special Tooling Necessary to do this Service Bulletin ....................... 1 5
3. ACCOMPLISHMENT INSTRUCTIONS .................................. 1 7 A. GENERAL INFORMATION ..................................... 1 7 B. WORK INSTRUCTIONS ....................................... 1 9 FIGURE 1: LEFT INBOARD ELEVATOR POWER CONTROL ACTUATOR (PCA) INSTALLATION - BUSHING INSPECTION .................................... 2 2 FIGURE 2: RIGHT INBOARD ELEVATOR POWER CONTROL ACTUATOR (PCA) INSTALLATION - BUSHING INSPECTION .................................... 2 6 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: August 23, 2013 747-27A2515 3 of 29 BOEING SERVICE BULLETIN 747-27A2515
ALERTALERT
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: August 23, 2013 747-27A2515 4 of 29 BOEING SERVICE BULLETIN 747-27A2515
ALERTALERT
BLANK PAGE
Commercial Airplanes 747 Service Bulletin ALERT SummaryNumber: 747-27A2515Original Issue: August 23, 2013 ATA System: 2731 5520 SUBJECT: FLIGHT CONTROLS - Elevator Control System - Inboard Elevator Power Control Actuator (PCA) Installation - Inspection
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 gives instructions to inspect the left and right inboard elevator power control actuator (PCA) installations to make sure that bushings are installed where the actuator rod ends are attached to the lugs. It also gives instructions to inspect the general area around each actuator, to make sure that there are no other defects or damage. If the bushings are not installed, the stiffness of the load path will be decreased, which will cause wear of adjacent parts and increased freeplay of the elevator surfaces. Freeplay which exceeds acceptable limits could result in divergent flutter for maneuvers above 1.6 g, which could lead to loss of controllability of the airplane.
During a recent C-check, an operator heard an unusual noise coming from the left inboard elevator during a functional check of the ram air turbine system. When investigating the cause of the noise, the operator found too much freeplay in the left inboard elevator, which they traced to a missing bushing in the PCA installation. A Boeing quality investigation found that the left inboard PCA had been disconnected from this airplane to replace the left elevator, which had been damaged before delivery. When the PCA was reconnected, however, the bushing was not installed. The operator did a detailed inspection of the PCA installation and a high-frequency eddy current (HFEC) inspection of the PCA attachment lug assembly, and found no other defects or damage.
As part of the Boeing quality investigation, all 747-8 airplanes currently in production were inspected to make sure that the bushings were installed on both the left and right sides. Boeing also inspected each production airplane between the horizontal stabilizer rear spar and the elevator front spar to make sure that there were no other defects or damage. This service bulletin was written for operators to do the same inspections on airplanes that have been delivered.
Boeing Service Related Problem (SRP) 747-8-SRP-27-0241 is related to this service bulletin.
Boeing Fleet Team Digest (FTD) 747 FTD 27-13005 is related to this service bulletin.
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: August 23, 2013 747-27A2515 5 of 29
This table is provided to operators for planning purposes only. Refer to the applicable sections for more information.
ReferenceAffectedPlanning Data Paragraph 1.A.2., Spares AffectedNoSpares 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 AffectedNoPublications 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 NoOperator Supplied Parts/Material Paragraph 2.F., Special Tooling Necessary to do this Service Bulletin NoSpecial Tooling Required ACTION Open access to the left and right inboard elevator PCA installations. Do a detailed inspection of each PCA installation to find if a bushing is installed, in accordance with PART 1. On each side, do a general visual inspection for defects or damage in accordance with PART 2. If a bushing is not installed, or if any defect or damage is found during the general visual inspection, contact Boeing for repair instructions and do the repair.
Close access.
EFFECTIVITY 747-8 and -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.
Refer to Paragraph 1.E., Compliance.
INDUSTRY SUPPORT INFORMATION At the time of release of this service bulletin, warranty remedies have not been determined. A subsequent revision or Information Notice will address the warranty remedies available, if any.
MANPOWER Refer to Paragraph 1.G., Manpower.
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: August 23, 2013 747-27A2515 6 of 29 BOEING SERVICE BULLETIN 747-27A2515
ALERTALERT
BOEING SERVICE BULLETIN 747-27A2515
ALERT ALERT
MATERIAL INFORMATION None.
STABILIZER REAR SPAR DO A GENERAL VISUAL INSPECTION FOR DEFECTS OR DAMAGE
INBOARD
ELEVATOR FWD
ELEVATOR
ACTUATOR LUG
LEFT SIDE SHOWN
RIGHT SIDE OPPOSITE
NBD ACTUATOR
DO A DETAILED ROD INSPECTION TO SEE IF A BUSHING IS INSTALLED FWD 2276950 Original Issue: August 23, 2013 PROPRIETARY - Copyright © Unpublished Export Controlled ECCN: 9E991 - BOEING 747-27A2515 Work - See page 1 for details. 7 of 29
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: August 23, 2013 747-27A2515 8 of 29 BOEING SERVICE BULLETIN 747-27A2515
ALERTALERT
BLANK PAGE
Commercial Airplanes 747 Service Bulletin ALERT Number: 747-27A2515 Original Issue: August 23, 2013 ATA System: 2731 5520 SUBJECT: FLIGHT CONTROLS - Elevator Control System - Inboard Elevator Power Control Actuator (PCA) Installation - Inspection
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 Refer to Service Bulletin Index D6-30300 Part 3 for Airplane Variable Number, Line Number, and Serial Number data.
This service bulletin is for the airplane(s) shown below.
DESCRIPTIONCONFIGURATIONGROUP All affected airplanes-1 Airplane Models:
747-8, 747-8F GroupVariable Number 1RC001 - RC008 1RC022 - RC029 1RC501 - RC508 1RC522 - RC523 1RC541 1RC546 - RC547 1RC551 - RC552 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: August 23, 2013 747-27A2515 9 of 29
GroupVariable Number 1RC554 - RC560 1RC571 - RC572 1RC574 - RC582 1RC601 - RC603
2. Spares Affected None.
B. Concurrent Requirements None.
C. Reason This service bulletin gives instructions to inspect the left and right inboard elevator power control actuator (PCA) installations to make sure that bushings are installed where the actuator rod ends are attached to the lugs. It also gives instructions to inspect the general area around each actuator, to make sure that there are no other defects or damage. If the bushings are not installed, the stiffness of the load path will be decreased, which will cause wear of adjacent parts and increased freeplay of the elevator surfaces. Freeplay which exceeds acceptable limits could result in divergent flutter for maneuvers above 1.6 g, which could lead to loss of controllability of the airplane.
During a recent C-check, an operator heard an unusual noise coming from the left inboard elevator during a functional check of the ram air turbine system. When investigating the cause of the noise, the operator found too much freeplay in the left inboard elevator, which they traced to a missing bushing in the PCA installation. A Boeing quality investigation found that the left inboard PCA had been disconnected from this airplane to replace the left elevator, which had been damaged before delivery.
When the PCA was reconnected, however, the bushing was not installed. The operator did a detailed inspection of the PCA installation and a high-frequency eddy current (HFEC) inspection of the PCA attachment lug assembly, and found no other defects or damage.
As part of the Boeing quality investigation, all 747-8 airplanes currently in production were inspected to make sure that the bushings were installed on both the left and right sides. Boeing also inspected each production airplane between the horizontal stabilizer rear spar and the elevator front spar to make sure that there were no other defects or damage. This service bulletin was written for operators to do the same inspections on airplanes that have been delivered.
Boeing Service Related Problem (SRP) 747-8-SRP-27-0241 is related to this service bulletin.
Boeing Fleet Team Digest (FTD) 747 FTD 27-13005 is related to this service bulletin.
D. Description Open access to the left and right inboard elevator PCA installations. Do a detailed inspection of each PCA installation to find if a bushing is installed, in accordance with PART 1. On each side, do a general visual inspection for defects or damage in accordance with PART 2. If a bushing is not installed, or if any defect or damage is found during the general visual inspection, contact Boeing for repair instructions and do the repair. Close access.
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: August 23, 2013 747-27A2515 10 of 29 BOEING SERVICE BULLETIN 747-27A2515
ALERTALERT
The work in this service bulletin is done in the maintenance zone(s) given below.
Affected Maintenance Zones ZoneModel 334, 344747-8, 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.
Do the required actions in accordance with Paragraph 3. Accomplishment Instructions.
Table 1: Inboard Elevator Power Control Actuator (PCA) Installations - Detailed and General Visual Inspections Repeat Interval (Not to Exceed) Compliance TimeActionCondition -Within 60 days after the Original Issue date of this service bulletin.
Do PART 1: INBOARD ELEVA-
TOR PCA INSTALLATIONS - DETAILED INSPECTION.
All Airplanes Do PART 2: INBOARD ELEVA-
TOR PCA INSTALLATIONS -
GENERAL VISUAL INSPEC- TION.
--No more work is necessary.CONDITION 1: BUSHING IN-
STALLED IN BOTH THE LEFT
AND RIGHT PCA INSTALLATIONS
AND NO DEFECT OR DAMAGE
FOUND DURING GENERAL VISU-
AL INSPECTION -Before further flight.Contact Boeing for repair instructions and do the repair.
CONDITION 2: BUSHING NOT
INSTALLED IN THE LEFT OR
RIGHT PCA INSTALLATION, OR
ANY DEFECT OR DAMAGE
FOUND DURING GENERAL VISU-
AL INSPECTION 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: August 23, 2013 747-27A2515 11 of 29 BOEING SERVICE BULLETIN 747-27A2515
ALERTALERT
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 inspection 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
0.501.002Open Access
0.500.501PART 1, Figure 1
0.500.501PART 1, Figure 2
1.001.001PART 2, Left Side
1.001.001PART 2, Right Side
0.501.002Close Access
4.005.00TOTAL FOR EACH AIRPLANE H. Weight and Balance Changes None.
I. Electrical Load Data Not applicable.
J. References
1. Existing Data:
a. Boeing Service Letter 747-SL-51-048
b. Boeing Service Related Problem (SRP) 747-8-SRP-27-0241
c. Service Bulletin Index D6-30300
d. 747 Fleet Team Digest (FTD) 27-13005
e. 747-8 Aircraft Maintenance Manual (AMM) 06-09-05, 06-09-06, 29-11-00 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: August 23, 2013 747-27A2515 12 of 29 BOEING SERVICE BULLETIN 747-27A2515