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____ R approximately at 5:00 o'clock (ALF) on the LPT case, and from R front to rear, relate to the 2nd, 3rd and 4th stages of the R LPT respectively.
R END OF SB CFMI 72-0376
R Subtask 72-54-00-480-058
R B. Install the BORESCOPE KIT (856A1320P04/P05) as follows:
R (1) Connect the power supply.
R CAUTION : BEFORE YOU CONNECT THE POWER SUPPLY TO THE POWER SOURCE BE
_______ R SURE THE ON-OFF SWITCH IS IN THE OFF POSITION AND LIGHT R INTENSITY CONTROL IS SET TO MINIMUM. MAKE SURE THAT R PROJECTOR AND POWER SUPPLY ARE CORRECTLY GROUNDED.
R (a) Connect the power supply.
R (2) Connect light source cable to rigid borescope and to port on R BORESCOPE - LIGHT SOURCE SET (856A1322/P02/P03/P04/P07/P08).
R (3) Turn light source on; insert borescope and position it as desired for R inspection.
R Subtask 72-54-00-290-058
R C. Inspect the stage 2-4 nozzle segment for the following:
R NOTE : The following limits are given for nozzle segments you can see
____ R near the borescope holes.
R -------------------------------------------------------------------------------R INSPECT/CHECK MAXIMUM REMARKS R SERVICEABLE LIMITS R -------------------------------------------------------------------------------
R 1. Cracks in trailing One crack maximum not See limit extensions R edge. more than 1 in. (25.4mm) (Ref. TASK 72-00-00-200-R with no crack on the 025) R opposite side of the R same airfoil. R If there are three R additional airfoils with
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R  2. Cracks in leading 
R  edge. 
R 
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R  3. Nicks and/or dents on 
R  leading and/or 
R  trailing edges. 
R  4. Nicks and/or dents on 
R  concave and/or convex 
R  sides. 
R  5. Burned areas, hot 
R  spots. 
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cracks, any number not more than 0.5 in. (12.7mm) on the same segment with no crack on the opposite side or if there is a crack on the opposite side, cumulative length must be less than 0.5 in. (12.7mm).
One crack maximum not more than 1 in. (25.4mm) with no crack on the opposite side of the same airfoil. If there are three additional airfoils with cracks, any number not more than 0.5 in. (12.7mm) on the same segment with no crack on the opposite side or if there is a crack on the opposite side, cumulative length must be less than 0.5 in. (12.7mm).
Any quantity, provided cracks criteria are met.
Any quantity, provided cracks criteria are met.
Any quantity, if there is no missing material and you see no bowing and/or melting.
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).
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 SERVICEABLE LIMITS
 -------------------------------------------------------------------------------R 6. Material particles Any quantity, if you see R peeling off on no bowing and/or R airfoil. melting.
R Subtask 72-54-00-080-058
R D. Removal of Borescope
R (1) When inspection is complete, turn lamp switch off, leave main light R source blower on for a while to cool lamp and housing.
R (2) Remove the borescope.
R Subtask 72-54-00-410-095
R E. Install Borescope Plugs R R PRE SB CFMI 72-0376 R
R (1) Apply graphite grease (Material No. CP2101) to the threads of the R borescope plugs S18, S19, S20 and install on the LPT case. 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 borescope cap assemblies S18, S19, S20 and install on the LPT case. R R END OF SB CFMI 72-0376 R R PRE SB CFMI 72-0376 R
R (3) TORQUE plugs to between 55 and 60 lbf.in (0.62 and 0.67 m.daN) and R safety with lockwire 0.032 in. (0.8 mm) dia. (Material No. CP8001) or R lockwire 0.032 in. (0.8 mm) dia. (Material No. CP8002). R R END OF PRE SB CFMI 72-0376 R R POST SB CFMI 72-0376
　
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