A320飞机维护手册 AMM ENGINE 发动机 2(68)

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____ radial spacing of the trailing edge slots is approximately 0.1 in. (2.55 mm).
 -------------------------------------------------------------------------------INSPECT/CHECK MAXIMUM REMARKS SERVICEABLE LIMITS -------------------------------------------------------------------------------
1. Leading edge for:
 A. Axial and radial Any number 0.05 in. See limit extensions
 cracks in area A.  (1.27 mm) long if they (Ref. TASK 72-00-00-200-do not connect more than 025). 2 holes.
 B. Axial and radial  Not serviceable.
 cracks in areas B
 and C, including
 root radius not
 intersecting nose
 or gill holes.

 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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