航空 发表于 2011-4-10 18:38:47

CFM56 3D Aero HPT Blade Shank Separation

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航空 发表于 2011-4-10 18:39:16

Slide 1 CFMI PROPRIETARY INFORMATION<BR>Investigation<BR>• Initial metallurgical results<BR>– Fatigue initiation origin from inside mid cooling cavity,<BR>convex side, .420 inches from shank base<BR>– 14 additional blades in set have internal cracks at same<BR>location (found by borescope, confirmed by destructive<BR>evaluation)<BR>• Investigation task team formed<BR>– Review manufacturing records<BR>– Dimensionally inspect disk and blades<BR>– Inspect other blade sets (BS and destructive evaluation)<BR>– Review/refine analysis models<BR>– Crack propagation analysis<BR>– Material program on coating effects<BR>CFM56 3D Aero HPT Blade Shank Separation<BR>• CFM56-5B/2P engine experienced HPT blade failure<BR>– Fully contained IFSD<BR>– TSN/CSN 9027 / 8745<BR>– Primary blade released in shank below platform<BR>– One additional blade failed in shank in tensile overload,<BR>remainder of blades failed at the airfoil root in tensile overload<BR>• Failed blade was a 2002M52P04<BR>– ~29 P04 blade sets shipped in 5B/P fleet<BR>– No P04 blades in CFM56-7 fleet<BR>– Shank geometry common to all HPT aero 3D aero blades (P04,<BR>P05, P09, P11)<BR>Background<BR>Action Plan<BR>• Initial metallurgical results Complete<BR>• Review of manufacturing records Complete<BR>• Disk/blade geometry inspections Complete<BR>• 3D blade/disk analysis update Complete<BR>• Blade inspection cutups Ongoing<BR>• Crack propagation analysis* Feb 2001<BR>• Define root cause March 2001<BR>• Material testing program complete June 2001<BR>• Define improvement June 2001<BR>* Additional studies ongoing<BR>Radial cross section of shank<BR>Crack<BR>Location<BR>Fatigue<BR>Origin of<BR>Prime Blade<BR>Secondary<BR>damage<BR>(tensile<BR>overload)<BR>Primary Blade Failure<BR>CFM56 3D aero HPT blade has<BR>experienced a new failure mode in-service

979199501 发表于 2011-4-12 00:18:23

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CFM56-7B TRAINING MANUAL ENGINE FAN TRIM BALANCE

kinran 发表于 2011-6-4 23:44:52

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bocome 发表于 2011-7-31 04:12:24

CFM56 3D Aero HPT Blade Shank Separation
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