8. Hard-facing wear.
9. Blade airfoil pretwist that cause gaps such as interlocks do not touch each other.
Not more than 0.015 in.
(0.38 mm)
Not serviceable
Any quantity that do not cause a mismatch of the blade tip shroud aft face of more than 0.12 in. (3.05 mm).
Not serviceable.
See limit extensions
(Ref. TASK 72-00-00-200-025).
If you find the blade tip
shrouds shingled or
unlatched on different
borescope inspections, it
may be the sign of a wear
of the hard-facing on the
blade tip interlock
surfaces.
The 4th stage blades may
be unshingled or relatched
by hand (Ref. TASK 72-54-00-210-004).
See limit extensions
(Ref. TASK 72-00-00-200-025).
See NOTE below.
See limit extensions
(Ref. TASK 72-00-00-200-025).
See NOTE below.
See limit extensions
(Ref. TASK 72-00-00-200-025).
See NOTE below.
NOTE : If the aircraft maintenance schedule permits, it is recommended to do
____ a visual inspection when you find these defects. Blades that are shingled or unlatched may be put back in their correct interlock positions, in following the special procedure (Ref. TASK 72-54-00-210-004).
10. Distortion of Not serviceable leading edge caused by overtemperature.
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11. Deposit material Any amount, provided
peeling off airfoil. there is no evidence of
bowing and/or melting.
Subtask 72-54-00-080-055
D. Removal of Borescope
(1) When inspection is completed, turn lamp switch off, leave main light source blower on for a while to cool lamp and housing.
(2) Remove the borescope.
Subtask 72-54-00-410-068
E. Install the Borescope Plug S20 on the LPT Case R R PRE SB CFMI 72-0376 R
(1) Apply graphite grease (Material No. CP2101) or Never Seez-Pure
Nickel, Special (Material No. CP2619), to the threads of the plug. R R END OF PRE SB CFMI 72-0376 R R POST SB CFMI 72-0376 R
R (2) Apply graphite grease (Material No. CP2101) to the threads of the R self locking borescope cap assembly. R R END OF SB CFMI 72-0376 R R PRE SB CFMI 72-0376 R
R (3) Install the plug on the LPT case. TORQUE to between 55 and 60 lbf.in
(0.62 and 0.67 m.daN). R R END OF PRE SB CFMI 72-0376 R R POST SB CFMI 72-0376 R
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R (4) Install the self locking borescope cap assemby on the LPT case. R TORQUE to between 50 and 55 lbf.in (0.56 and 0.62 m.daN).
R NOTE : To achieve the correct installation of the self locking
____ R borescope cap assembly, the slot of its ring must be R positioned on the borescope boss lug at the final tightening.
R END OF SB CFMI 72-0376 R R PRE SB CFMI 72-0376 R
R (5) Safety the plug with lockwire 0.032 in. (0.8 mm) dia. (Material No.
CP8001) or lockwire 0.032 in (0.8 mm) dia. (Material No. CP8002). R R END OF PRE SB CFMI 72-0376
Subtask 72-54-00-410-089
F. Install the blanking plug on the turbine frame instrumention boss at 8:30 o'clock (ALF) as follows:
(1) Lubricate the threads of the 2 plug attachment bolts with graphite grease (Material No. CP2101).
(2) Install the gasket on the blanking plug and engage the plug in the turbine frame boss.
(3) Install the 2 bolts and the 2 nuts (self-locking) to attach the plug to the boss.
(4) TORQUE the 2 nuts to between 95 and 110 lbf.in (1.07 and 1.24 m.daN).
5. Close-up
________
Subtask 72-54-00-410-069
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 cowl doors (Ref. TASK 78-36-00-410-040): FOR 1000EM1 451AL, 452AR FOR 1000EM2 461AL, 462AR
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B. Make the thrust reverser serviceable (Ref. TASK 78-30-00-081-041). Subtask 72-54-00-410-077
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