EFFECTIVITY
ALL CFM56 ENGINES
CFMI PROPRIETARY INFORMATION
CFM56-ALL
TRAINING MANUAL
LOW PRESSURE
TURBINE
BORESCOPE
INSPECTION
Page 152
Sep 03
LOW PRESSURE TURBINE (LPT)
(ALL) :
Possible defects.
Whenever the LPT blades are inspected, the following
defects should be assessed against the AMM
serviceability limits :
- Cracks in the airfoil surface, platform, or tip shroud.
- Convex and/or concave surfaces nicks and dents.
- Leading edge distortion and melting, due to
overtemperature.
- Large dent, or missing pieces of metal.
- Metallization of the leading edges and/or concave
surface (Gold coloration).
- Gaps in the tip shroud interlocks.
- Bent or bowed airfoil.
- Shingled, or unlatched tip shroud.
- Circumferential wear.
- Seal teeth wear.
- Flaking on the hardened seal teeth.
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