CFM Booster Vane Outer Shroud Abradable Material Deterioration

航空发表于 2011-4-29 11:24:08

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航空发表于 2011-4-29 11:24:19

CFM56-7B WTT Meeting - September,26-27/2002 CFM / Boeing Proprietary Information - Unauthorized Disclosure, Use, or Export are Prohibited 1 Booster Vane Outer Shroud Abradable Material Deterioration Fan Stator Module CFM56-7B WTT Meeting - September,26-27/2002 CFM / Boeing Proprietary Information - Unauthorized Disclosure, Use, or Export are Prohibited 2 Background  Several reported cases where booster vanes were found with outer shroud coating (Metco 601NS) missing – Condition was discovered during routine on-wing or in-shop inspection  No associated operational consequences reported – Other CFM56 engine models affected – Cases found on high time engines – Missing coating often extends locally on lower side at 6 o’clock position Booster Abradable Material Deterioration CFM56-7B WTT Meeting - September,26-27/2002 CFM / Boeing Proprietary Information - Unauthorized Disclosure, Use, or Export are Prohibited 3 Engineering assessment  Root cause investigation - Completed – Abradable Aluminum particles deteriorated by Chlorine, sulfur – Booster drain system not a predominant factor  Potential impact on engine performance – Effect on Booster stall margin to be demonstrated  Stall line, and operating line slightly impacted  To be confirmed by engine test » Test results expected 2Q 2003 Booster Abradable Material Deterioration CFM56-7B WTT Meeting - September,26-27/2002 CFM / Boeing Proprietary Information - Unauthorized Disclosure, Use, or Export are Prohibited 4 VVisisuuaallCCoonnddititioionnooffBBoooosstteerrVVaanneeOOuutteerrSShhrroouuddMMaatteerriaiall Booster Abradable Material Deterioration CFM56-7B WTT Meeting - September,26-27/2002 CFM / Boeing Proprietary Information - Unauthorized Disclosure, Use, or Export are Prohibited 5 Corrective Action Plan  Extend serviceable limit when missing coating is noticed to minimize in-service burden – New AMM limits to be issued based on engine test results  Continue in-service extension could be granted – Current AMM limit  100 cm2 of missing material  Overserviceability of 100 hours is available – Current ESM limit  Not serviceable  Repair procedure available to restore part condition  Evaluation of a new abradable material bond coat – Alternate solution being evaluated through corrosion tests  Long term activity Booster Abradable Material Deterioration

kinran 发表于 2011-6-4 22:35:29

:victory: :victory:

bocome 发表于 2011-7-31 05:24:19

CFM Booster Vane Outer Shroud Abradable Material Deterioration

chutiankuo0832 发表于 2011-8-24 22:13:20

 Long term activity Booster Abradable Material Deterioration

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CFM Booster Vane Outer Shroud Abradable Material Deterioration