EFFECTIVITY
ALL CFM56 ENGINES
CFMI PROPRIETARY INFORMATION
CFM56-ALL TRAINING MANUAL
REQUIREMENTS
BORESCOPE INSPECTION
Page 52
Sep 03
DOCUMENTATION
(ALL) :
AMM.
The Aircraft Maintenace Manual (AMM) provides
comprehensive instructions on how to perform a
borescope inspection and provides the limits for the
various engine parts.
There are no denitive measurement devices for the
borescope.
Evaluating inconsistencies is not an easy task because
all measurements by borescope are comparative.
The inspector can make a comparison with some known
area within the eld of view which can then be referenced
to a specic paragraph in the maximum serviceable limits
specied in the AMM.
Note : The language used in the serviceability limits may
take some study for proper interpretation.
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