CFM CFM56 Series, Training Manual

Page: 54 / 216

EFFECTIVITY
ALL CFM56 ENGINES
CFMI PROPRIETARY INFORMATION
CFM56-ALL TRAINING MANUAL
REQUIREMENTS
BORESCOPE INSPECTION
Page 53
Sep 03
CTC-229-015-00
AIRCRAFT MAINTENANCE MANUAL INSPECTION CRITERIA
----------------------------------------------------------------------------------------------------------------------------------------------
INSPECT/CHECK MAXIMUM REMARKS
SERVICEABLE LIMITS
----------------------------------------------------------------------------------------------------------------------------------------------
Stages 1-4 compressor
blade airfoil leading
and trailing edge,
upper 75 percent:
A.Tears Not serviceable Replace the engine
Ref. TASK 71-00-00-000-
042) or repair (Ref. TASK
72-31-00-300-004).
B.Nicks, missing Any number 0.04 in. (1.0 See limit extensions
material and mm) max depth Ref. TASK 72-00-00-200-
erosion 025) or repair (Ref. TASK
72-31-00-300-004).
C.Dents Any number 0.04 in. (1.0 See limit extensions
mm) max depth or 0.060 (Ref. TASK 72-00-00-200-
in. (1.52 mm) max 025) or repair (Ref. TASK
deflection from original 72-31-00-300-004).
contour
TOC