EFFECTIVITY
ALL CFM56 ENGINES
CFMI PROPRIETARY INFORMATION
CFM56-ALL
TRAINING MANUAL
REQUIREMENTS
BORESCOPE INSPECTION
Page 48
Sep 03
BORESCOPE ACCESS LIMITATIONS
(ALL) :
There are two limitation factors that have to be
considered when preparing for borescope inspection on
CFM56 engines.
These considerations are :
- the size of the borescope probe to be inserted into
the engine.
- the temperatures of the engine parts at each
inspection port.
The purpose of having probe size and temperature
limitations is to prevent damage to the borescope
equipment.
Without size limitations a probe could be lodged, or
seized in a borescope port during installation, or removal.
The use of temperature limitations prevents melting, or
heat distortion, of a borescope probe, if it is inserted
into a hot engine. Without these limitations there can be
subsequent deformation of borescope probes, excessive
replacement/repair costs of equipment, and even Foreign
Object Damage (FOD) to the engine itself.
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