February 2002 WTT face to face CFMI / Boeing Proprietary Information - Unauthorized Disclosure, Use, or Export are Prohibited 1 Abradable Metco Deterioration February 2002 WTT face to face CFMI / Boeing Proprietary Information - Unauthorized Disclosure, Use, or Export are Prohibited 2 Abradable Metco Deterioration Field Experience : Stage 1 • One case of stage 1 Booster Vane was identified with two damaged areas on the outer shroud coating during on-wing routine inspection (periodic Fan Blade lubrication) TSN/CSN : 8,311 hours / 2,875 cycles One area extends from 40 mm (1.575 in) long to 20 mm (0.787 in) wide at 7 o’clock position and other from 150 mm (5.906 in) long to 20 mm (0.787 in) wide at 6 o’clock position – Damages were found within AMM limits - Total affected surface is equal to 40 cm2 (100 cm2 is permitted without in-service restriction) No FOD event reported February 2002 WTT face to face CFMI / Boeing Proprietary Information - Unauthorized Disclosure, Use, or Export are Prohibited 3 Field Experience : Stage 1 • One new case of stage 1 Booster Vane was found with either missing or flaking material close to 6 o’clock position on the outer shroud coating (periodic Fan Blade lubrication) – TSN/CSN : 12,312 hrs / 6,544 cycles – Damage was found within AMM limits – Second Engine installed in position #2 exhibits similar condition Engine #1 initially operated by another customer Engine experienced a birdstrike in July 1997 » BSI performed and condition was found satisfactory Root Cause Not Understood Abradable Metco Deterioration February 2002 WTT face to face CFMI / Boeing Proprietary Information - Unauthorized Disclosure, Use, or Export are Prohibited 4 Outer shroud coating missing Booster blade Engine position #1 - booster vane outer shroud coating condition Outer shroud coating missing Booster blade Engine position #2 - booster vane outer shroud coating condition Abradable Metco Deterioration February 2002 WTT face to face CFMI / Boeing Proprietary Information - Unauthorized Disclosure, Use, or Export are Prohibited 5 Field Experience: Stage 4 • Booster Vane from PCA engine 874120 coating missing at 6 o’clock TSN/CSN : 7,733 hrs / 6,145 cycles EDS analysis evidenced presence of significant rate Cl, S & Na – Tap water content highly suspected (damages after water wash) • One case of Booster Vane (Stages 1, 3, 4) was found with local flaking on the outer shroud coating during engine overhaul TSN/CSN : 9,416 hours / 3,784 cycles Damage was found out of ESM limits Root cause demonstrated to be incorrect engine preservation after shop visit Abradable Metco Deterioration February 2002 WTT face to face CFMI / Boeing Proprietary Information - Unauthorized Disclosure, Use, or Export are Prohibited 6 One engine found with Booster Vanes showing eroded / missing material on the outer shroud coating TSN/CSN : 9,233 hrs / 3,180 cycles Stage 1 = Erosion Stage 4 = Unknown Not expertized yet Corrosion Sources Under Study Abradable Metco Deterioration February 2002 WTT face to face CFMI / Boeing Proprietary Information - Unauthorized Disclosure, Use, or Export are Prohibited 7 Investigation • Engineering activity has been launched on PCA engine 875-201 currently in disassembly phase Visual inspection already revealed flaking on Stage 1 – Results expected by end of Feb 2002 • Evaluation of chemical products impacts on abradable aging High chlorine rate in tap water Engine cleaning products Abradable Metco Deterioration PCA Engine 875-201作者: kinran 时间: 2011-6-4 23:24:07
