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Commercial Airplanes 737 Service Bulletin
SPECIAL ATTENTION Number: 737-78-1086 Original Issue: October 06, 2010 ATA System: 7831 SUBJECT: EXHAUST - Thrust Reverser System - Inspection of the Fire Seal and Installation of a New Fire Seal Bracket on the Thrust Reverser Export of this technology is controlled under the United States Export Administration Regulations (EAR) (15 CFR 730-774). 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BOEING PROPRIETARY, CONFIDENTIAL, AND/OR TRADE SECRET Copyright © 2010 The Boeing Company Unpublished Work - All Rights Reserved Boeing claims copyright in each page of this document only to the extent that the page contains copyrightable subject matter. Boeing also claims copyright in this document as a compilation and/or collective work.
This document includes proprietary information owned by The Boeing Company and/or one or more third parties.
Treatment of the document and the information it contains is governed by contract with Boeing. For more information, contact The Boeing Company, P.O. Box 3707, Seattle, Washington 98124.
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, KDC-10, MD-10, MD-11, MD-80, MD-88, MD-90, P-8A, Poseidon and the Boeing livery 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.
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4.0
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Table of Contents
Summary5
1. PLANNING INFORMATION9
A. Effectivity9
1. Airplanes9
2. Spares Affected ........................................ 1 9 B. Concurrent Requirements ...................................... 1 9 C. Reason ................................................ 2 0 D. Description .............................................. 2 0 E. Compliance .............................................. 2 0 F. Approval ............................................... 2 0 G. Manpower .............................................. 2 1 H. Weight and Balance Changes .................................... 2 2 I. Electrical Load Data ......................................... 2 2 J. References .............................................. 2 2
1. Existing Data .......................................... 2 2
2. Data supplied with this Service Bulletin ............................ 2 2
3. Installation Drawings Used in the Preparation of this Service Bulletin ............ 2 2 K. Publications Affected ........................................ 2 2 L. Interchangeability and Intermixability of Parts ........................... 2 3
2. MATERIAL INFORMATION ........................................ 2 5 A. Material - Price and Availability ................................... 2 5 B. Industry Support Information .................................... 2 6 C. Parts Necessary For Each Airplane ................................. 2 6
1. Kits/Parts ............................................ 2 6
2. Parts and Materials Supplied by the Operator ........................ 2 6
3. Parts Modified and Reidentified ................................ 2 7
4. Parts Removed and Not Replaced .............................. 2 7 D. Parts Necessary to Change Spares ................................. 2 7 E. Special Tooling - Price and Availability ............................... 2 7 F. Special Tooling Necessary to do this Service Bulletin ....................... 2 7
3. ACCOMPLISHMENT INSTRUCTIONS .................................. 2 9 A. GENERAL INFORMATION ..................................... 2 9 B. WORK INSTRUCTIONS ....................................... 3 0 FIGURE 1: INSPECTION OF THE UPPER FIRE SEAL ON THE LEFT THRUST REVERSER HALF . 33 FIGURE 2: REMOVAL OF THE UPPER PIECE OF FIRE SEAL ON THE LEFT THRUST REVERSER HALF .................................................. 3 6 FIGURE 3: REMOVAL OF THE UPPER FIRE SEAL ON THE LEFT THRUST REVERSER HALF . . 38 FIGURE 4: VENT HOLE INSPECTION OF UPPER FIRE SEAL ON THE LEFT THRUST REVERSER HALF .................................................. 4 0 FIGURE 5: INSTALLATION OF NEW VENT HOLES ON THE FIRE SEAL ON THE LEFT THRUST REVERSER HALF ....................................... 4 2 FIGURE 6: FASTENER REMOVAL OF THE RETAINER SUPPORT ON THE LEFT THRUST REVERSER HALF .............................................. 4 4 FIGURE 7: INSTALLATION OF THE NEW BRACKET BEHIND THE RETAINER SUPPORT ON THE LEFT THRUST REVERSER HALF .................................. 4 7 FIGURE 8: INSTALLATION OF THE UPPER FIRE SEAL ON THE LEFT THRUST REVERSER HALF . 50
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FIGURE 9: INSTALLATION OF THE UPPER FIRE SEAL ON THE LEFT THRUST REVERSER HALF . 52 FIGURE 10: INSPECTION OF THE UPPER FIRE SEAL ON THE RIGHT THRUST REVERSER HALF . 54 FIGURE 11: REMOVAL OF THE UPPER PIECE OF FIRE SEAL ON THE RIGHT THRUST REVERSER HALF .............................................. 5 7 FIGURE 12: REMOVAL OF THE UPPER FIRE SEAL ON THE RIGHT THRUST REVERSER HALF . 59 FIGURE 13: VENT HOLE INSPECTION OF UPPER FIRE SEAL ON THE RIGHT THRUST REVERSER HALF .............................................. 6 1 FIGURE 14: INSTALLATION OF NEW VENT HOLES ON THE FIRE SEAL ON THE RIGHT THRUST REVERSER HALF ....................................... 6 3 FIGURE 15: FASTENER REMOVAL OF THE RETAINER SUPPORT ON THE RIGHT THRUST REVERSER HALF .............................................. 6 5 FIGURE 16: INSTALLATION OF THE NEW BRACKET BEHIND THE RETAINER SUPPORT ON THE RIGHT THRUST REVERSER HALF .................................. 6 8 FIGURE 17: INSTALLATION OF THE UPPER FIRE SEAL ON THE RIGHT THRUST REVERSER HALF .................................................. 7 1 FIGURE 18: INSTALLATION OF THE UPPER FIRE SEAL ON THE RIGHT THRUST REVERSER HALF .................................................. 7 3
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Commercial Airplanes 737 Service Bulletin
SPECIAL ATTENTION SummaryNumber: 737-78-1086Original Issue: October 06, 2010 ATA System: 7831 SUBJECT: EXHAUST - Thrust Reverser System - Inspection of the Fire Seal and Installation of a New Fire Seal Bracket on the Thrust Reverser BOEING RECOMMENDS THAT EACH OPERATOR EXAMINE THIS SERVICE BULLETIN IMMEDIATELY.
CONCURRENT REQUIREMENTS None.
BACKGROUND This service bulletin gives instructions to do an inspection on the upper fire seals on the thrust reversers for damage, stiffness, and missing vent holes. Boeing has received reports of damaged fire seals on the forward edge of the thrust reverser, where the fire seal contacts the 12 O'clock engine strut. The damage has been reported as light wear marks, tears, and holes in the bulb-part of the fire seal. This change installs a new bracket to increase the fire seal's resistance to air pressure at the location of the failures. The new bracket will help prevent damage to the upper fire seal on the thrust reversers. A damaged fire seal could decrease the protection capacity of the fire extinguishing system and result in damage to the 12 o'clock strut and the firewall of the thrust reverser.
This service bulletin replaced service bulletin 737-78-1075.
Boeing Service Related Problem (SRP) 737-SRP-71-0049 is related to this service bulletin.
ACTION (PRR 38275-151S) Open the thrust reverser. Do a general visual inspection on the upper fire seal on each thrust reverser half. Do a stiffness check on the upper fire seal on each thrust reverser half. If the fire seal is damaged or does not meet the specified stiffness, remove and replace the upper fire seal. Do a general visual inspection behind the upper fire seal to make sure there are sufficient vent holes. If necessary, drill more vent holes in the upper fire seal.
Install a new bracket behind the fire seal retainer. Close the thrust reverser and do the thrust reverser adjustment.
EFFECTIVITY 737-600/-700/-700C/-800/-900/-900ER Airplanes. Refer to Paragraph 1.A.1., Airplanes for the list of affected airplanes.
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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 inspection and change given in this service bulletin be done within 36 months after the original issue date of this service bulletin.
INDUSTRY SUPPORT INFORMATION Boeing warranty remedies are available for airplanes in warranty as of November 19, 2007. Please refer to Paragraph 2.B., Industry Support Information.
MANPOWER Elapsed HoursTotal Task HoursEngines
8.509.00Engine 1
8.509.00Engine 2
MATERIAL INFORMATION Boeing Supplied Kits/Parts.
Refer to Paragraph 2.A., Material - Price and Availability.
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BOEING SERVICE BULLETIN 737-78-1086
INSPECT FOR DAMAGE AND DO A STIFFNESS CHECK. REPLACE IF NECESSARY. INSTALL A NEW
BRACKET BEHIND THE FIRE SEAL RETAINER.
FWD LEFT SIDE SHOWN, 1867877
RIGHT SIDE EQUIVALENT Original Issue: October 06, 2010 737-78-1086
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Commercial Airplanes 737 Service Bulletin
SPECIAL ATTENTION Number: 737-78-1086 Original Issue: October 06, 2010 ATA System: 7831 SUBJECT: EXHAUST - Thrust Reverser System - Inspection of the Fire Seal and Installation of a New Fire Seal Bracket on the Thrust Reverser BOEING RECOMMENDS THAT EACH OPERATOR EXAMINE THIS SERVICE BULLETIN IMMEDIATELY.
1. PLANNING INFORMATION A. Effectivity
1. Airplanes This service bulletin is for the airplanes shown below. An equivalent change is on subsequent production airplanes. Refer to PRR 38275-151S for data about this change.
Refer to Service Bulletin Index Document D6-19567 Part 3 for Airplane Variable Number, Line Number, and Serial Number data.
DESCRIPTIONCONFIGURATIONGROUP 737-600/-700/-700C/-800/-900/-900ER Airplanes with Line Number 1 thru 3029.
-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 1YA251 - YA256 1YA271 - YA272
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GroupVariable Number 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 1YA881 - YA882 1YA891 - YA892
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GroupVariable Number 1YA961 - YA978 1YB001 - YB006 1YB101 - YB132 1YB151 - YB153 1YB156 - YB158 1YB161 - YB164 1YB171 - YB172 1YB181 - YB184 1YB201 - YB208 1YB271 1YB276 1YB301 - YB310 1YB371 - YB392 1YB501 - YB502 1YB521 - YB526 1YB541 - YB544 1YB551 1YB561 - YB598 1YB601 - YB632 1YB651 1YB656 1YB671 - YB672 1YB851 - YB863 1YB871 - YB874 1YB881 - YB893 1YB901 - YB903 1YB911 1YB961 - YB974 1YB986 - YB989 1YC001 - YC030 1YC051 - YC084 1YC091 - YC095 1YC101 - YC104
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GroupVariable Number 1YC111 - YC113 1YC121 1YC126 - YC127 1YC136 - YC141 1YC146 - YC147 1YC151 - YC156 1YC166 - YC171 1YC176 - YC179 1YC186 - YC190 1YC201 - YC203 1YC206 - YC207 1YC301 - YC305 1YC321 - YC387 1YC391 - YC394 1YC396 1YC401 - YC417 1YC421 - YC422 1YC426 - YC428 1YC436 - YC439 1YC441 - YC448 1YC451 - YC455 1YC459 1YC461 - YC467 1YC471 - YC499 1YC501 - YC526 1YC571 - YC583 1YC587 - YC589 1YC591 - YC593 1YC601 - YC655 1YC681 - YC696 1YC701 - YC715 1YC720 - YC725 1YC727 - YC752
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