CFM56-7B WTT Meeting - September,26-27/2002 CFM / Boeing Proprietary Information - Unauthorized Disclosure, Use, or Export are Prohibited 1 Booster Spool Wear Fan Rotor Module CFM56-7B WTT Meeting - September,26-27/2002 CFM / Boeing Proprietary Information - Unauthorized Disclosure, Use, or Export are Prohibited 2 Booster Spool Wear Background Glazing/wear marks evidenced on the forward flange of the booster spool at each fan blade position As of today, 28 engines received special inspection 11 engines with no abnormal condition found 14 engines found with light marks of wear noticed on some areas 3 engines found with deep wear – Up to 4 mils Fan Rotor Module Fwd booster spool flange Fan blade shank Fan disk CFM56-7B WTT Meeting - September,26-27/2002 CFM / Boeing Proprietary Information - Unauthorized Disclosure, Use, or Export are Prohibited 3 0 0,05 0,1 0,15 0,2 0,25 0,3 0 5000 10000 15000 20000 25000 30000 OPERATING TIME (Cycles Since New) WEAR DEPTH (mm) Conditon v isually ev aluated Wear depth measured Fleet av erage Projected wear at part life limit expiration (30,000 cycles): 0,007 in. (0,19 mm) 7643 Booster Spool Wear Inspection Status Fan Rotor Module CFM56-7B WTT Meeting - September,26-27/2002 CFM / Boeing Proprietary Information - Unauthorized Disclosure, Use, or Export are Prohibited 4 Engineering Activity completed Glazing/wear marks caused by contact with fan blade shank aft surface during wind milling and engine start sequence (<33 rpm) Rig and engine tests completed in an effort to minimize wear in future operation 3000 cycles cumulated during engine test – 3.256.000 rotation cumulated rig test Seven configurations tested – Best result obtained with periodic lubrication of contact area Booster spool fwd flange and fan blade shank wear level significantly reduced (3x) Booster Spool Wear Fan Rotor Module Root Cause Identified - Final fix Defined CFM56-7B WTT Meeting - September,26-27/2002 CFM / Boeing Proprietary Information - Unauthorized Disclosure, Use, or Export are Prohibited 5 Corrective Actions CESM No.005 updated to implement periodic lubrication of the Fan Blade shank rear surface – Revision 001 issued in April, 2002 Manual limits extended in effort to minimize in-service burden – AMM revision issued in February, 2002 Wear is permitted if not more than 0.008 in. (0,20 mm) deep – New limit extension under review December, 2002 Repair procedure being developed to restore part condition at piece-part level – Estimated completion date December, 2002 Booster Spool Wear Fan Rotor Module作者: kinran 时间: 2011-6-4 22:34:47
