February 2002 WTT face to face CFMI / Boeing Proprietary Information - Unauthorized Disclosure, Use, or Export are Prohibited 1 Fuel Filter Spinning February 2002 WTT face to face CFMI / Boeing Proprietary Information - Unauthorized Disclosure, Use, or Export are Prohibited 2 Fuel Filter Spinning Issue Background • Four events reported of fuel filter spinning in the gear housing MFP • Investigation revealed flurosilicone seals instead of fluorocarbon seals Other CFM56 engine models use flurosilicon seals Investigation • Main fuel filter end cap heavy worn out • Main fuel filter exhibited missing packing o-ring • Main fuel filter equipped with non conforming packing o-rings (fluorosilicone seals instead of fluorocarbon seals) February 2002 WTT face to face CFMI / Boeing Proprietary Information - Unauthorized Disclosure, Use, or Export are Prohibited 3 Corrective Actions • Customer sensitized through AOW n°99/CFM56/358 and Fleet Highlite articles issued in Jul 99, Sep 99 and Dec 00 • Main fuel filter installation procedure reviewed and released through AMM 73-11-10 to avoid packing o-rings main fuel filter damage at installation • Boeing message number n°M-7200-00-03047 issued in Dec 2000 to check and replace fuel filter element packing o-rings • Main fuel filter packing O-rings standardized (fluorocarbon “viton”) for all CFM56 engine models To avoid configuration error in mixed fleet Released through service bulletins (-3 : 73-0137, 5A: 73-0160, 5B: 73-084, 5C: 73-0101, 2C:73-084) since May 2001 Fuel Filter Spinning Issue February 2002 WTT face to face CFMI / Boeing Proprietary Information - Unauthorized Disclosure, Use, or Export are Prohibited 4 Corrective Actions (Final Fix) • New main fuel filter element modifications Fluorocarbon packing o-rings directly installed on the fuel filter element by Supplier Anti rotation of the main fuel filter element – No change in pump housing Other modifications introduced to take into account of end cap fuel filter fretting wear marks (cover side) • Engine testing completed No fuel filter rotation observed • Expected release early 2nd Qtr 2002 (CFM56-7B S/B category 5) New fuel filter element PN: 219946 (old fuel filter element PN: 218134 not procurable in spare) Fuel Filter Spinning Issue作者: 979199501 时间: 2011-4-15 23:57:14 标题: 回复 1# 航空 的帖子
Arm
Proposed Switch Configuration
Current Double Throw
Proposed Single Throw
Run contact eliminated
Introduction Logistics
• CFMI/Boeing/Honeywell laun作者: kinran 时间: 2011-6-4 23:19:45
