航空 发表于 2011-4-24 12:20:53

CFM Aft Engine Mount Center Link

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航空 发表于 2011-4-24 12:21:12

CFMI / Boeing Proprietary Information - Unauthorized Disclosure, Use, February 2002 WTT face to face or Export are Prohibited<BR>Aft Engine Mount Center Link<BR>Gary Morriss<BR>Boeing Service Engineering<BR>CFMI / Boeing Proprietary Information - Unauthorized Disclosure, Use, February 2002 WTT face to face or Export are Prohibited<BR>Aft Engine Mount Center Link<BR>• Background:<BR> The aft engine mount contains a<BR>center link which secures the aft<BR>mount to two center TRF lugs.<BR> Center link is boomerang-shaped<BR>and almost symmetrical from left<BR>to right.<BR> Two operators found a total of 7<BR>engines with a reversed center<BR>link.<BR>– All cases were found after<BR>aft mount overhaul.<BR> Reversed center link locates aft<BR>engine 0.174 inches to the right.<BR> Condition not related to new<BR>production.<BR>CFMI / Boeing Proprietary Information - Unauthorized Disclosure, Use, February 2002 WTT face to face or Export are Prohibited<BR>• Actions Completed<BR> Fleet communication<BR>– 737NG / CFM56-7B WTT F2F Meeting Presentation (Feb ‘02)<BR>– Boeing Fleet Team Digest Article 737ng-FTD-71-01003, dated 20<BR>Dec ‘01<BR>– Fleet Team Emerging Issues No EM-02-00018, dated 17 Apr ’02<BR> Maintenance documentation changes<BR>– Revised AMM, CMM, and PPBM to clarify assembly (1Q ‘02)<BR> Agency Communication (FAA and DGAC) - No immediate concern<BR>– Boeing Agency Letter (15-Apr 2002)<BR>– CFMI Agency Letter (18-Apr ‘02), CFMI JTM (4-Jun-’02)<BR> Boeing Engineering Investigation Board - Safety SRP identified (May ‘02)<BR>– Determined requirement for Boeing Alert Service Bulletin<BR>Aft Engine Mount Center Link<BR>CFMI / Boeing Proprietary Information - Unauthorized Disclosure, Use, February 2002 WTT face to face or Export are Prohibited<BR>• Action Completed (cont)<BR> Alert Service Bulletin<BR>– SB 737-71A1462 released on MyBoeingFleet 15 August 2002 and<BR>dated 29 August ‘02.<BR> Turbine Rear Frame Life Assessment on all reported TRF’s<BR>– TRF P/Ns 340-166-205-0 and 340-166-206-0 - no life impact for<BR>SAC operation<BR>– TRF P/N 340-027-113-0 - analysis in process, ECD mid-<BR>September ‘02<BR>Aft Engine Mount Center Link<BR>CFMI / Boeing Proprietary Information - Unauthorized Disclosure, Use, February 2002 WTT face to face or Export are Prohibited<BR>Marking of<BR>Hanger Fitting<BR>and Center<BR>Link<BR>Aft Looking<BR>Forward<BR>• Action Plan to Prevent Misinstallation<BR>of Center Link<BR> Proposal to part-mark center<BR>link and aft mount hanger<BR>fitting.<BR> Results in new part number for<BR>aft mount assembly and center<BR>link.<BR> Design change decision<BR>September ’02<BR> SB to retrofit aft mounts inservice<BR>– status TBD<BR>– Propose to vibro-engrave<BR>markings on existing aft<BR>mounts.<BR>Aft Engine Mount Center Link

yangy2397 发表于 2011-4-27 15:45:41

<A href="thread-7267663-1-1.html"><STRONG>CFM Aft Engine Mount Center Link</STRONG></A>

卩丬My蓅蒗er 发表于 2011-4-27 21:48:44

CFM Aft Engine Mount Center Link

kinran 发表于 2011-6-4 22:38:09

:victory: :victory:

bocome 发表于 2011-7-31 05:23:07

CFM Aft Engine Mount Center Link
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