航空 发表于 2011-4-15 09:02:56

CFM HPC Stage 1 and 2 Spool Life

**** Hidden Message *****

航空 发表于 2011-4-15 09:03:14

February 2002 WTT face to face CFMI / Boeing Proprietary Information - Unauthorized Disclosure, Use, or Export are Prohibited 1<BR>HPC Stage 1 and 2<BR>Spool Life<BR>February 2002 WTT face to face CFMI / Boeing Proprietary Information - Unauthorized Disclosure, Use, or Export are Prohibited 2<BR>1-2 Spool Life Extension Status<BR>• CFM56 HPCR 1-2 Spools have experienced edge of contact cracking<BR>– Blade vibration leads to fretting on pressure face<BR>– Fretting leads to crack initiation at edge of contact<BR>– Low stress is consistent with the shallow cracks found in spools<BR>cut up to date<BR>February 2002 WTT face to face CFMI / Boeing Proprietary Information - Unauthorized Disclosure, Use, or Export are Prohibited 3<BR>1-2 Spool Life Extension Status<BR>• At time of initial certification for -7, CFMI proposed a 20,000 cycle<BR>Manual Limit for the long dovetail 1-2 Spool<BR>– Minimum calculated LCF life is &gt;100,000 cycles for edge of contact<BR>location<BR>– A restriction was placed on the limit at initial certification based on<BR>contact cracking in other engine line<BR>• Result: 1-2 Spool Manual Limit is currently 13,000 cycles<BR>February 2002 WTT face to face CFMI / Boeing Proprietary Information - Unauthorized Disclosure, Use, or Export are Prohibited 4<BR>• CFMI has an approved plan with the Agencies to allow removal of the<BR>13,000 cycle restriction on the CFM56-7B 1-2 Spool Manual Limit<BR>– Plan utilizes analysis and data from 2 field run -7B spools between<BR>8,000 and 10,000 cycles to substantiate LLP life extension<BR>– Timing precedes first field engine reaching 13,000 cycles<BR>• Plan does not require any special inspections on the -7 spool to reach<BR>20,000 cycle life limit<BR>1-2 Spool Life Extension Status<BR>February 2002 WTT face to face CFMI / Boeing Proprietary Information - Unauthorized Disclosure, Use, or Export are Prohibited 5<BR>• First -7B high time spool has been removed and inspected<BR>– ESN 875-134, with 1-2 Spool GWNBM937 TSN 12,380, CSN 8879<BR>– Part received both standard FPI inspection, and high<BR>sensitivity 10X white light inspection - both inspections<BR>showed NO indications<BR>– Second spool identified and will be removed Feb 2002<BR>• Current fallout estimate against current manual limit is 1Q2003<BR>1-2 Spool Life Extension Status

kinran 发表于 2011-6-4 23:25:45

:victory: :victory:

bocome 发表于 2011-7-31 04:41:55

CFM HPC Stage 1 and 2 Spool Life

chutiankuo0832 发表于 2011-8-24 22:19:31

good materials<br>
页: [1]
查看完整版本: CFM HPC Stage 1 and 2 Spool Life