A320飞机维护手册 AMM ENGINE 发动机 2(86)

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R  END OF SB CFMI 72-0376
 Subtask 72-54-00-480-056
 B. Install the BORESCOPE KIT (856A1320P04/P05) as follows:
 (1) Connect the power supply.
 CAUTION : BEFORE YOU CONNECT THE POWER SUPPLY TO THE POWER SOURCE BE_______ SURE THE ON-OFF SWITCH IS IN THE OFF POSITION AND LIGHT INTENSITY CONTROL IS SET TO MINIMUM. MAKE SURE THAT PROJECTOR AND POWER SUPPLY ARE CORRECTLY GROUNDED.
 (a) Connect the power supply.
 (2) Connect light source cable to rigid borescope and to port on BORESCOPE - LIGHT SOURCE SET (856A1322/P02/P03/P04/P07/P08).
 (3) Turn light source on; insert borescope and position it as desired for inspection.
 Subtask 72-54-00-290-056
 C. Inspect the stage 2-4 nozzle segment for the following:
 NOTE : The following limits are given for nozzle segments you can see____ near the borescope holes.
 -------------------------------------------------------------------------------INSPECT/CHECK MAXIMUM REMARKS SERVICEABLE LIMITS -------------------------------------------------------------------------------
1. Cracks in trailing edge.  Any quantity not more than 0.6 in. (15 mm) long.  See limit extension(Ref. TASK 72-00-00-200-025)
 2. Cracks in leading edge.  Any quantity not more than 0.4 in. (10 mm) long.  See limit extension(Ref. TASK 72-00-00-200-025).

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R R R  -------------------------------------------------------------------------------INSPECT/CHECK MAXIMUM REMARKS SERVICEABLE LIMITS -------------------------------------------------------------------------------3. Nicks and/or dents on Any quantity, provided See limit extensions leading and/or cracks criteria are met. (Ref. TASK 72-00-00-200-trailing edges. 025).
 4. Nicks and/or dents on concave and/or convex sides.  Any quantity, provided cracks criteria are met.  See limit extensions(Ref. TASK 72-00-00-200-025).
 5. Burned areas, hot spots.  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).
R R R  6. Material particles peeling off on airfoil.  Any quantity, if you see no bowing and/or melting.
 Subtask 72-54-00-080-056
 D. Removal of Borescope
 (1) When inspection is complete, turn lamp switch off, leave main light source blower on for a while to cool lamp and housing.
 (2) Remove the borescope.
 Subtask 72-54-00-410-070
 E. Install Borescope Plugs
 PRE SB CFMI 72-0376
 (1) Apply graphite grease (Material No. CP2101) to the threads of the borescope plugs S18, S19, S20 and install on the LPT case.
 END OF PRE SB CFMI 72-0376
 POST SB CFMI 72-0376
 (2) Apply graphite grease (Material No. CP2101) to the threads of the borescope cap assemblies S18, S19, S20 and install on the LPT case.
 END OF SB CFMI 72-0376

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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).
 END OF PRE SB CFMI 72-0376
 POST SB CFMI 72-0376
 (4) TORQUE self locking borescope cap assemblies to between 50 and 55 lbf.in (0.56 and 0.62 m.daN).
 NOTE : To achieve the correct installation of the self locking
____ borescope cap assembly, the slot of its ring must be positioned on the borescope boss lug at the final tightening.
 END OF SB CFMI 72-0376
 5. Close-up
________
 Subtask 72-54-00-410-071
 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

 Subtask 72-54-00-440-058
 B. Make the thrust reverser serviceable (Ref. TASK 78-30-00-081-041).
 Subtask 72-54-00-410-078
 C. Close Access
 (1) Close the fan cowl doors (Ref. TASK 71-13-00-410-040): FOR 1000EM1 437AL, 438AR FOR 1000EM2 447AL, 448AR
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 (2) Remove the warning notice(s).
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