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Commercial Airplanes 737 Service Bulletin ALERT Number: 737-57A1327 Original Issue: May 20, 2016 Revision 1: September 28, 2016 ATA System: 5740 SUBJECT: WINGS - Leading Edge And Leading Edge Devices - Krueger Flap 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 © 2016 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Unpublished Work.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: May 20, 2016 737-57A1327Revision 1: September 28, 2016 1 of 51
3.0
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: May 20, 2016 737-57A1327Revision 1: September 28, 2016 2 of 51 BOEING SERVICE BULLETIN 737-57A1327
ALERTALERT
BLANK PAGE
Table of Contents
Revision Transmittal Sheet5
Summary7
1. PLANNING INFORMATION11
A. Effectivity11
1. Airplanes11
2. Spares Affected28
B. Concurrent Requirements28
C. Reason28
D. Description28
E. Compliance29
F. Approval30
G. Manpower30
H. Weight and Balance Changes31
I. Electrical Load Data31
J. References31
1. Existing Data:31
2. Data Supplied with this Service Bulletin:31
3. Installation Drawings Used in the Preparation of this Service Bulletin:31
K. Publications Affected31
L. Interchangeability and Intermixability of Parts32
M. Software Accomplishment Summary32
2. MATERIAL INFORMATION33
A. Material - Price and Availability33
B. Industry Support Information33
C. Parts Necessary for Each Airplane33
1. Kits/Parts33
2. Parts and Materials Supplied by the Operator33
3. Parts Modified and Reidentified33
4. Parts Removed and Not Replaced33
D. Parts Necessary to Change Spares34
E. Special Tooling - Price and Availability34
F. Special Tooling Necessary to do this Service Bulletin34
3. ACCOMPLISHMENT INSTRUCTIONS35
A. GENERAL INFORMATION35
B. WORK INSTRUCTIONS36
FIGURE 1: LEFT WING - KRUEGER FLAP 1 AND 2 BULLNOSE ATTACHMENT HARDWARE ONE-TIME
INSPECTION38
FIGURE 2: RIGHT WING - KRUEGER FLAP 3 AND 4 BULLNOSE ATTACHMENT HARDWARE ONE-TIME
INSPECTION41
FIGURE 3: LEFT WING - KRUEGER FLAP 1 AND 2 BULLNOSE ATTACHMENT HARDWARE
INSTALLATION44
FIGURE 4: RIGHT WING - KRUEGER FLAP 3 AND 4 BULLNOSE ATTACHMENT HARDWARE
INSTALLATION47
APPENDIX A: LOGIC DIAGRAM FOR PARAGRAPH 1.E. COMPLIANCE: TABLE 1: KRUEGER FLAP
BULLNOSE ATTACHMENT HARDWARE ONE-TIME INSPECTION50
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: May 20, 2016 737-57A1327Revision 1: September 28, 2016 3 of 51 BOEING SERVICE BULLETIN 737-57A1327
ALERTALERT
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: May 20, 2016 737-57A1327Revision 1: September 28, 2016 4 of 51 BOEING SERVICE BULLETIN 737-57A1327
ALERTALERT
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Commercial Airplanes 737 Service Bulletin ALERT Revision Transmittal SheetNumber: 737-57A1327Original Issue: May 20, 2016 Revision 1: September 28, 2016 ATA System: 5740 SUBJECT: WINGS - Leading Edge And Leading Edge Devices - Krueger Flap Inspection This revision includes all pages of the service bulletin.
COMPLIANCE INFORMATION RELATED TO THIS REVISION 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.
Effects of this Revision on airplanes on which Original Issue was previously done:
None.
REASON FOR REVISION This revision is sent to give a clarification that a removal of the attachment hardware is not necessary when accomplishing the detailed inspection of the hardware. Also this revision changes illustrations to show correct orientation of the attachment hardware and gives minor changes on terminology and general references.
The data given in Information Notice 737-57A1327 IN 01 is included in this revision.
These sections were changed:
1. In Summary, Action, changed the terminology to "any crack" and removed the terminology "if required".
2. In Summary, Effectivity, added reference for spares affected.
3. In Summary, Material Information, added Operator supplied parts/materials reference.
4. In Paragraph 1.C., Reason, added Fleet Team Digest (FTD) and Service Related Problem (SRP) information. Added reason for the revision.
5. In Paragraph 1.D., Description, changed the terminology to "any crack" and removed the terminology "if required". Added effects of this revision.
6. In Paragraph 1.E., Compliance, updated existing reference to refer to Table 1.
7. In Paragraph 1.G., Manpower, added a title to the manpower table.
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: May 20, 2016 737-57A1327Revision 1: September 28, 2016 5 of 51
8. In Paragraph 1.J.3., Installation Drawings Used in the Preparation of this Service Bulletin, updated drawing title and removed drawing.
9. In Paragraph 2.C.2., Parts and Materials Supplied by the Operator, updated the footnote.
10. In Paragraph 3.B., Work Instructions, added a note to do the detailed inspection without removal of the attachment hardware and removed the terminology "as applicable". Updated existing note to put the airplane back to a serviceable condition.
11. In FIGURE 1 and FIGURE 2, updated illustrations, added a footnote, and updated footnote terminology.
12. In FIGURE 3 and FIGURE 4, updated illustrations and added an SOPM reference for cotter pin installation.
13. In APPENDIX A, updated logic diagram to be consistent with the compliance table.
Vertical lines are put on the left edge of each page, except in Paragraph 1.A., Effectivity and format changes, to show the location of all content changes.
Pages with no vertical lines have no changes.
REVISION HISTORY May 20, 2016Original Issue:
September 28, 2016Revision 1:
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: May 20, 2016 737-57A1327Revision 1: September 28, 2016 6 of 51 BOEING SERVICE BULLETIN 737-57A1327
ALERTALERT
Commercial Airplanes 737 Service Bulletin ALERT SummaryNumber: 737-57A1327Original Issue: May 20, 2016 Revision 1: September 28, 2016 ATA System: 5740 SUBJECT: WINGS - Leading Edge And Leading Edge Devices - Krueger Flap Inspection
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.
CONCURRENT REQUIREMENTS None.
BACKGROUND The Bullnose of a 737-800 Krueger Flap departed an airplane during taxi and caused damage to the wing structure and part of the thrust reverser. There have been six (6) other in-service reports of missing Bullnose attachment hardware resulting in a Bullnose droop condition but no departure of the part from the airplane. If this service bulletin is not accomplished, the Krueger Flap Bullnose could depart the airplane during flight, which could damage empennage structure leading to inability to maintain continued safe flight and landing.
Boeing Fleet Team Digest (FTD) 737NG FTD 57-15003 is related to this service bulletin.
Boeing Service Related Problem (SRP) 737NG-57-0283 is related to this service bulletin.
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 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 AffectedNoPublications Affected Paragraph 1.K., Publications AffectedNoAirplane Flight Operations Affected (Flight Crew Operations Manual and/or FAA Approved Airplane Flight Manual) Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: May 20, 2016 737-57A1327Revision 1: September 28, 2016 7 of 51
ReferenceAffectedPlanning Data 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 Get access and do a one-time detailed inspection for discrepancies in the Bullnose attachment hardware of Krueger Flaps no. 1, 2, 3 and 4. If any discrepancy is found, do a secondary detailed inspection for any crack or any deformation and either replace the discrepant hardware or Krueger Flap.
EFFECTIVITY 737-600/700/700C/800/900/900ER Airplane(s). Refer to Paragraph 1.A.1., Airplanes, for the list of affected airplanes.
Refer to Paragraph 1.A.2., Spares Affected, for the list of affected components.
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 January 28, 2015 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 Elapsed HoursTotal Task HoursAirplanes
2.802.80Group 1
MATERIAL INFORMATION Operator Supplied Parts/Materials.
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: May 20, 2016 737-57A1327Revision 1: September 28, 2016 8 of 51 BOEING SERVICE BULLETIN 737-57A1327
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BOEING SERVICE BULLETIN 737-57A1327
ALERT ALERT
LE STA LE STA
218.88 206.32 LE STA
190.85 LE STA
180.52 LE STA
166.32 LE STA
158.82 INBD VO. 1 KRUEGER FLAP IS SHOWN NO. 4 KRUEGER FLAP IS OPPOSITE LE STA
150.82
DO A ONE-TIME DETAILED
INSPECTION FOR DISCREPANCIES IN THE ATTACHMENT HARDWARE.
LE STA
104.52 NBD
DO A ONE-TIME DETAILED NO. 2 KRUEGER FLAP IS SHOWN, INSPECTION FOR DISCREPANCIES NO. 3 KRUEGER FLAP IS OPPOSITE IN THE ATTACHMENT HARDWARE. 2483896 Original Issue: May 20, 2016 Revision 1: September 28, 2016 Export Controlled ECCN: 9E991 - BOEING 737-57A1327 PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 9 of 51
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: May 20, 2016 737-57A1327Revision 1: September 28, 2016 10 of 51 BOEING SERVICE BULLETIN 737-57A1327
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Commercial Airplanes 737 Service Bulletin ALERT Number: 737-57A1327 Original Issue: May 20, 2016 Revision 1: September 28, 2016 ATA System: 5740 SUBJECT: WINGS - Leading Edge And Leading Edge Devices - Krueger Flap Inspection
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.
1. PLANNING INFORMATION A. Effectivity
1. Airplanes This service bulletin is applicable to 737-600, -700, -700C, -800, -900, -900ER Airplanes line numbers 1-5502 in 1 Group. The Variable Numbers and Group Information for the applicable airplanes is given below.
Refer to Service Bulletin Index D6-19567 Part 3 for Airplane Variable Number, Line Number, and Serial Number data.
DESCRIPTIONCONFIGURATIONGROUP 737-600, -700, -700C, -800, -900, -900ER Airplanes-1 Airplane Models:
737-600, 737-700, 737-700C, 737-800, 737-900, 737-900ER GroupVariable Number 1YA001 - YA099 1YA101 - YA199 1YA201 - YA211 1YA221 1YA231 - YA242 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: May 20, 2016 737-57A1327Revision 1: September 28, 2016 11 of 51
GroupVariable Number 1YA251 - YA256 1YA271 - YA272 1YA291 1YA301 - YA302 1YA311 - YA314 1YA321 - YA323 1YA336 - YA345 1YA351 1YA356 - YA357 1YA366 - YA367 1YA371 - YA377 1YA501 - YA536 1YA541 - YA552 1YA571 - YA578 1YA601 - YA615 1YA621 - YA622 1YA626 - YA631 1YA635 - YA636 1YA641 - YA642 1YA645 - YA650 1YA656 - YA659 1YA666 - YA667 1YA671 - YA672 1YA681 - YA691 1YA701 - YA710 1YA721 - YA722 1YA731 - YA734 1YA751 - YA756 1YA801 - YA803 1YA809 1YA811 - YA814 1YA831 - YA835 1YA841 - YA862 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: May 20, 2016 737-57A1327Revision 1: September 28, 2016 12 of 51 BOEING SERVICE BULLETIN 737-57A1327