CFM CFM56-2 - HPT Rotor Blade and Shroud - Inspection with a Flexible Probe

EFFECTIVITY
ALL CFM56 ENGINES
CFMI PROPRIETARY INFORMATION
CFM56-ALL TRAINING MANUAL
HIGH PRESSURE
TURBINE
BORESCOPE
INSPECTION
Page 138
Sep 03
HIGH PRESSURE TURBINE (HPT)
(ALL) :
Inspection with a exible probe.
Use the exible probe with the guide tube to inspect the
HPT blade L/E and the forward part of the HPT shroud.
Insert the guide tube 856A1310, or 856A1351, through
the S10, or S11 ports and position it between two nozzle
vanes.
Carefully insert the exible probe into the guide tube and
monitor the probe insertion in between the nozzle vanes.
Guide the tip of the exible probe between the nozzle
vanes by using the tip deection control and position it to
see the L/E of the HPT blades.
Rotate the core engine to inspect all the blades, then
inspect the HPT shroud segments.
Map the defects on the special reporting form.
TOC