EFFECTIVITY
ALL CFM56 ENGINES
CFMI PROPRIETARY INFORMATION
CFM56-ALL TRAINING MANUAL
BASIC ENGINE
PARTICULARS
BORESCOPE INSPECTION
Page 36
Sep 03
COMBUSTOR SECTION
(ALL) :
Borescope ports.
There are 4 borescope ports located around the
combustor case to enable inspection of the combustion
chamber.
The ports are numbered S12 to S15 and accommodate a
simple plug with a hexagonal head.
Ports S12, S13, S14 and S15 have a 10mm diameter.
Two other ports are available using the spark igniter ports
S10 and S11, which also have a 10mm diameter.
Refer to the AMM for removal procedures.
(-5B, -7B) :
The DAC combustion chamber has an extra port, S14.5,
at approximately the 9 o’clock position.
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