(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. Subtask 72-52-00-040-053
C. Make the thrust reverser unserviceable (Ref. TASK 78-30-00-481-041). Subtask 72-52-00-010-057
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) Subtask 72-52-00-869-051
A. Prepare for inspection:
(1) Use the MONITOR, RESOLUTION BORESCOPE (856A1323G01) to make sure that the borescope or fiberscope and 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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Core Rotation Drive Motor Installation
Figure 601/TASK 72-52-00-991-304
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Inspection of the HPT Blade
Figure 602/TASK 72-52-00-991-300
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R Rub Wear Notches on the Blade Tip and Cracks (Only Applicable NON /P Engines)
Figure 603/TASK 72-52-00-991-301
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High-Pressure Turbine Blade Inspection Areas (Only Applicable NON /P Engines)
Figure 604/TASK 72-52-00-991-302
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(a) To turn the core manually with a breaker bar, do the steps that follow:
1 Remove the handcranking drive cover from the core rotation pad
_ on the left side of the accessory gearbox (AGB), opposite the starter (Ref. TASK 72-63-00-000-002).
2 Install a 0.75 in. square drive socket with a 2ft. long
_ breaker bar into the handcranking drive pad. When you do the borescope inspection, turn the core engine clockwise (CW, aft looking forward).
NOTE : To turn the core engine CW, the handcranking drive must
____ be turned counterclockwise (CCW).
(b) To turn the core with a drive motor, do the steps that follow:
1 Remove the starter (Ref. TASK 80-11-10-000-002).
_
2 Install the MOTOR, DRIVE - CORE ENGINE ROTATION (856A1488 P01
_ or P02) into the accessory gearbox (AGB) starter drive pad. Align the drive shaft of the drive motor with the starter drive pad shaft and engage the splines.
NOTE : The tool must be installed in the horizontal position
____ with the air hoses to the rear.
3 Turn the tool until the captive bolts align with the gearbox
_
bolt holes.
4 Tighten the two captive bolts by hand.
_
5 Install the clamp to secure the drive motor.
_
6 Attach the foot or hand control air hoses to the quick
_
disconnects on the tool.
7 Connect the air supply to the drive motor. The air supply must
_ be capable of 100 psi (6.9 bar). The air supply must be lubricated and filtered at 6 SCFM (170 L/minute).
(3) Remove one of the borescope plugs (S16 or S17) found immediately in front of the aft flange of the combustion case at the 5:30 and 8:30 o'clock positions.
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