航空 发表于 2011-4-22 10:45:41

CFM Turbine Rear Frame Module AFT Sump Inlet Cover O-Ring

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航空 发表于 2011-4-22 10:45:57

CFM56-7B WTT Meeting - September,26-27/2002 CFM / Boeing Proprietary Information - Unauthorized Disclosure, Use, or Export are Prohibited 1<BR>AFT Sump Inlet Cover O-Ring<BR>Turbine Rear Frame Module<BR>CFM / Boeing Proprietary Information - Unauthorized Disclosure, Use, CFM56-7B WTT Meeting - September,26-27/2002 or Export are Prohibited<BR>Oil Inlet cover O-ring<BR>Background<BR>7 reported cases of Oil seepage from the Aft<BR>sump (as of July 2002).<BR>Affected engines range from<BR>3400 to 9600 Hrs<BR>2300 to 4000 Cy<BR>Problem noticed through either<BR>Oil Consumption up-shift (3 cases)<BR>OR<BR>External oil seepage / oily T/R blanket (stable<BR>Oil Consumption)<BR>AFT loooking FWD<BR>Leak path<BR>O-ring<BR>Turbine Rear Frame Module<BR>CFM56-7B WTT Meeting - September,26-27/2002 CFM / Boeing Proprietary Information - Unauthorized Disclosure, Use, or Export are Prohibited 3<BR>Root cause investigation<BR>• Root cause identified  damaged Oil Inlet Cover O-Ring<BR>• O-ring found brittle, hardened, with compression set and missing material.<BR>• O-ring material (Viton E) properties affected due to local high temperature.<BR>O-Ring : P/N 649-393-271-0<BR>(IPC 72-00-00-70 Item 320)<BR>Oil Inlet cover O-ring<BR>Turbine Rear Frame Module<BR>CFM56-7B WTT Meeting - September,26-27/2002 CFM / Boeing Proprietary Information - Unauthorized Disclosure, Use, or Export are Prohibited 4<BR>Additional Findings<BR>• Other cause identified with same symptom<BR> cracked scavenge brazed nipple (Nbr 5 Brg Support)<BR>(Qty: 3).<BR>– due to b-nut torque applied w/o counter-torque<BR>– require engine change<BR>Field containment Plan<BR>• On-Wing o-ring replacement procedure to be introduced in<BR>the AMM.<BR>• Procedure available at Boeing by End of October,<BR>2002<BR>• ESM procedure available.<BR>Final Fix<BR>• Potential Material change under evaluation<BR>Oil Inlet cover O-ring<BR>Turbine Rear Frame Module

TINA59 发表于 2011-5-16 13:56:34

<P>想了解<FONT face=Calibri color=#0000ff>TURBINE REAR FRAME........</FONT></P>

kinran 发表于 2011-6-4 21:57:47

:lol :lol :victory: :victory:

bocome 发表于 2011-7-31 05:34:10

CFM Turbine Rear Frame Module AFT Sump Inlet Cover O-Ring
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