EFFECTIVITY
ALL CFM56 ENGINES
CFMI PROPRIETARY INFORMATION
CFM56-ALL TRAINING MANUAL
FAN AND
BOOSTER
BORESCOPE
INSPECTION
Page 76
Sep 03
FAN AND BOOSTER
(ALL) :
Visual inspection of the fan blades is performed on a
regular basis depending on the MRB, or MPD.
If defects are found, then an unscheduled inspection is
required.
Possible defects:
- missing material, tip curl.
- nicks, dents, pits or scratches, usually due to
ingestion of small foreign objects such as sand,
stones, dust, tarmac, etc.
- distortion, cracks and deformation, usually due to
heavier foreign object damage (FOD), such as
birds, ice, hail, tires, etc.
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