C. Nicks and dents in Any amount.
area A.
D. Nicks and dents in Any amount.
area B.
E. Nicks and dents in 3 permitted, 0.05 in.
area C, including (1.27 mm) long. Nicks
root radius. and dents must be
separated by 0.125 in.
(3.17 mm) minimum.
F. Axial nose or gill Not serviceable. See limit extensions hole cracks, areas (Ref. TASK 72-00-00-200-B and C. 025).
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G. Radial nose or None allowed in area C, See limit extensions
gill hole cracks, one permitted, 0.03 in. (Ref. TASK 72-00-00-200-
areas B and C. (0.76 mm) long in area 025).
B.
H. Dirt or Any amount.
environmental
build-up.
J. Missing material Any amount provided See limit extensions
in areas A and B. cavity 2 not exposed (Ref. TASK 72-00-00-200-
(max 2 blades per 025).
engine). Repeat the
inspection within 100
hours.
K. Missing material Not serviceable.
in area C.
L. Missing thermal Any amount.
barrier coating.
2. Blade tip for:
NOTE : There are 4 notched blades (90 degrees apart) in the HPT rotor to
____
show the amount of blade tip rubbing. If the notches can or cannot be
seen, the condition is serviceable.
A. Radial cracks on Any number permitted 0.7 See limit extensions
concave side. in. (17.78 mm) max (Ref. TASK 72-00-00-200-
radial length. 025).
B. Bent, curled or Any amount within 0.2
missing material. in. (5.08 mm) of tip.
C. Missing thermal Any amount.
barrier coating.
3. Concave and convex
surfaces for:
A. Nicks or dents, Any number 0.25 in.
area A. (6.35 mm) long.
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B. Nicks or dents, Any number, 0.1 in.
area B. (2.54 mm) long.
C. Nicks or dents, 3 permitted, 0.05 in.
area C. (1.27 mm) long. Nicks
and dents must be
separated by 0.125 in.
(3.17 mm) minimum.
D. Cracks, other Not serviceable.
areas.
E. Missing thermal Any amount.
barrier coating.
4. Blade airfoil for:
A. Distortions or Not serviceable.
evidence of
burning or
melting.
B. Missing codep Any amount.
coating.
C. Missing thermal Any amount.
barrier coating.
(11) When the inspection is completed, turn off the BORESCOPE - LIGHT SOURCE SET (856A1322 P03, P04 or P07) and remove the FIBERSCOPE SET (856A1321 P01 or P03) and guide tube.
(12) Install the spark igniter (Ref. TASK 74-21-30-400-002).
(13) Tools used to rotate the core as follows:
(14) Remove the tools used to rotate the core as follows:
NOTE : If the breaker bar is installed see steps (a) and (b). If the
____ drive motor is installed see steps (c) and (d).
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