See limits extension(Ref. TASK 72-00-00-200-025).
See limit extensions(Ref. TASK 72-00-00-200-025).
See limit extensions(Ref. TASK 72-00-00-200-025).
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 -------------------------------------------------------------------------------INSPECT/CHECK MAXIMUM REMARKS SERVICEABLE LIMITS -------------------------------------------------------------------------------
concave) within
 0.50 in. (12.7 mm) of trailing edge.
 E. Missing thermal barrier coating.
 3. Convex and concave surfaces for:
 A. Nicks or dents, area A.
B. Nicks or dents, area B.
C. Nicks or dents, area C.
D. Cracks in other areas.
 E. Missing thermal barrier coating.
 4. Blade airfoil for:
 A. Distortions or evidence of burning or melting.
Any amount.
Any number, 0.25 in.
(6.35 mm) long.
Any number, 0.1 in.
(2.54 mm) long.
3 permitted, 0.05 in.
(1.27 mm) long. Nicks and dents must be separated by 0.125 in.
 (3.17 mm) minimum.
Not serviceable.
Any amount.
Not serviceable.
See limit extensions(Ref. TASK 72-00-00-200-025).
See limit extensions(Ref. TASK 72-00-00-200-025).
See limit extensions(Ref. TASK 72-00-00-200-025).
See limit extensions(Ref. TASK 72-00-00-200-025).
 (2) When the inspection is complete, turn off the BORESCOPE - LIGHT SOURCE SET (856A1322 P03, P04 or P07) and remove the BORESCOPE KIT (856A1320 P04 or P05).
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 (3) Apply a small amount of graphite grease (Material No. CP2101) or Never Seez-Pure Nickel, Special (Material No. CP2619) to the borescope plug threads and pressure faces.

 (4) Install the borescope plug. CAUTION : BE SURE TO INSTALL THE CORRECT BORESCOPE PLUGS. THE TWO LPT

_______ STAGE 1 NOZZLE BORESCOPE PLUGS HAVE A STEM FEATURE. INADVERTENT INSTALLATION OF THESE PLUGS IN THE COMBUSTION CASE WILL RESULT IN THE STEM BEING BURNED AWAY BY COMBUSTION GASSES.
 (a) Install the borescope plug(s) and TORQUE to between 57 and 63 lbf.in (0.64 and 0.71 m.daN).
 (5) Safety the plugs with lockwire 0.032in.(0.8mm) dia. (Material No. CP8001).

 (6) If no defects were found 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).

 (a) Remove the 0.75 in. (19.05 mm) square drive socket and 2 ft.

 (0.60 m) breaker bar from the core rotation drive pad.

 (b) Install the handcranking drive pad cover (Ref. TASK 72-63-00-400-002).

 (c) Remove the drive motor from the starter pad of the AGB.

 (d) Install the starter (Ref. TASK 80-11-10-400-002).

 (7) If defects were found do a borescope inspection of the HPT blades from the front (Ref. TASK 72-52-00-290-004).
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________ Subtask 72-52-00-410-060
 A. Close Access
 (1) Make sure that the work area is clean and clear of tool(s) and other items.

 (2) Close the thrust reverser doors without making thrust reverser serviceable (Ref. TASK 78-36-00-410-040). FOR 1000EM1 451AL, 452AR FOR 1000EM2 461AL, 462AR

 Subtask 72-52-00-440-055
 B. Make the thrust reverser serviceable (Ref. TASK 78-30-00-081-041). Subtask 72-52-00-410-061
 C. Close Access
 (1) Close the fan cowls (Ref. TASK 71-13-00-410-040):
 FOR 1000EM1
 437AL, 438AR
 FOR 1000EM2
 447AL, 448AR.

 (2) Remove the warning notice(s).

 (3) Remove the access platform(s).

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 TASK 72-52-00-290-004
 Borescope Inspection of the High Pressure Turbine Rotor Blade (from the front)
　
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