This TASK is applicable for NON /P engines.
Inspection of the high pressure turbine (HPT) blades from the front is
limited to the areas that can be seen with a flexible borescope installed at
the spark igniter ports (S10 and S11).
NOTE : There are 80 HPT blades installed in the rotor.
____
2. Job Set-up Information
______________________
A. Fixtures, Tools, Test and Support Equipment
-------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific access platform
No specific protective caps
No specific warning notice
No specific 0.75 in. square drive socket
No specific 2ft. long breaker bar
856A1310 1 KIT, BORESCOPE GUIDE - HP TURBINE
856A1321 1 FIBERSCOPE SET
856A1322 1 BORESCOPE - LIGHT SOURCE SET
856A1323 1 MONITOR, RESOLUTION BORESCOPE
856A1488 1 MOTOR, DRIVE - CORE ENGINE ROTATION
B. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
71-13-00-010-040 Opening of the Fan Cowl Doors 71-13-00-410-040 Closing of the Fan Cowl Doors 72-00-00-200-025 Over-Serviceable-Limit Extensions 72-42-00-290-005 Inspection of the Combustion Chamber and HPT Nozzle
Following a Birdstrike/FOD
72-63-00-000-002 Removal of the Handcranking Drive Cover
72-63-00-400-002 Installation of the Handcranking Drive Cover
74-21-30-000-002 Removal of the Spark Igniter
74-21-30-400-002 Installation of the Spark Igniter
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78-30-00-081-041 Make the Thrust Reverser Serviceable after Maintenance 78-30-00-481-041 Make the Thrust Reverser Unserviceable for
Maintenance 78-36-00-010-040 Opening of the Thrust Reverser Doors 78-36-00-410-040 Closing of the Thrust Reverser Doors 80-11-10-000-002 Removal of the Pneumatic Starter 80-11-10-400-002 Installation of the Pneumatic Starter NTM 72-00-00 72-52-00-991-304 Fig. 601 72-52-00-991-300 Fig. 602 72-52-00-991-301 Fig. 603 72-52-00-991-302 Fig. 604 72-52-00-991-303 Fig. 608
3. Job Set-up
__________
Subtask 72-52-00-941-052
A. Safety Precautions
(1) On the center pedestal, on the ENG panel 115VU:
(a) Put a warning notice to tell persons not to start the engine.
(2) Make sure that the engine 1(2) shutdown occurred not less than 5 minutes before you do this procedure.
(3) On the overhead maintenance panel 50VU:
(a) Make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off.
(b) Put a warning notice to tell persons not to energize the FADEC 1(2).
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B. Get Access
(1) Open the fan cowls doors: (Ref. TASK 71-13-00-010-040)
FOR 1000EM1
437AL, 438AR
FOR 1000EM2
447AL, 448AR.
(2) Put the access platform in position. Subtask 72-52-00-040-052
C. Make the thrust reverser unserviceable (Ref. TASK 78-30-00-481-041). Subtask 72-52-00-010-055
D. Open the thrust reverser cowl doors (Ref. TASK 78-36-00-010-040):
FOR 1000EM1
451AL, 452AR
FOR 1000EM2
461AL, 462AR.
4. Procedure
_________
(Ref. Fig. 601/TASK 72-52-00-991-304, 602/TASK 72-52-00-991-300, 603/TASK
72-52-00-991-301, 604/TASK 72-52-00-991-302, 608/TASK 72-52-00-991-303) Subtask 72-52-00-290-052
A. Prepare for inspection:
(1) Use the MONITOR, RESOLUTION BORESCOPE (856A1323G01) to make sure the borescope and the light source are serviceable. See the Non-Destructive Test Manual for this procedure (Ref. NTM 72-00-00).
(2) Install the tools to turn the core engine. NOTE : The core engine may be turned using a breaker bar (see step
____ (a)) or with a drive motor (see step (b)).
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