CFM56-7B WTT Meeting - September,26-27/2002 CFM / Boeing Proprietary Information - Unauthorized Disclosure, Use, or Export are Prohibited 1 IDG Acoustic Panel Fan Frame Module CFM56-7B WTT Meeting - September,26-27/2002 CFM / Boeing Proprietary Information - Unauthorized Disclosure, Use, or Export are Prohibited 2 IDG Acoustic Panel Background • Several cases of IDG panel failure on CFM56-7B Engines reported • Mechanical potting characteristics decrease through temperature and aging phenomenon Fan Frame Module CFM56-7B WTT Meeting - September,26-27/2002 CFM / Boeing Proprietary Information - Unauthorized Disclosure, Use, or Export are Prohibited 3 IDG Acoustic Panel Corrective actions New AMM limits – 500 cycles Service Extension allowed with panel removed (AMM72- 23-02 Jun, 2001) – AMM revised in June, 2002 Design improvement – Upper and inner skins material changed to increase temperature characteristics : From 120°C to 180°C – Panel Potting change for better behavior in high temperature environment conditions : From Minnesota to E3439 – Manufacturing process changed to increase hole edge strength – SB72-362 approved, and to be issued in October, 2002 – New part implemented on production engines in October, 2002 Fan Frame Module作者: kinran 时间: 2011-6-4 23:07:27
