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
77-31-30-991-301 Fig. 501
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3. Job Set-up
__________
Subtask 77-31-30-941-055
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).
Subtask 77-31-30-010-061
B. Get Access
(1) Open the fan cowl doors: (Ref. TASK 71-13-00-010-040)
FOR 1000EM1
437AL, 438AR
FOR 1000EM2
447AL, 448AR
(2) Put the access platform in position.
Subtask 77-31-30-040-054
C. Make the thrust reverser unserviceable (Ref. TASK 78-30-00-481-041).
Subtask 77-31-30-010-062
D. Open the left thrust reverser door: (Ref. TASK 78-36-00-010-040)
FOR 1000EM1
451AL
FOR 1000EM2
461AL
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4. Procedure
_________
(Ref. Fig. 501/TASK 77-31-30-991-301)
Subtask 77-31-30-760-050
A. Electrical Test of the Turbine Rear Frame (TRF) Vibration Sensor
NOTE : If the sensor is not serviceable at the end of this test, the
____ engine is still serviceable and permits the subsequent flights. But, remove and replace the sensor at the first engine shop visit.
(1) Disconnect the EVMU harness from the TRF vibration sensor connector at one o'clock. Use soft-nose connector pliers only if necessary.
(2) Visually inspect the TRF vibration sensor (Ref. TASK 77-31-30-210-002).
(3) Measure the insulation resistance with a Megohmmeter 0-100 Megohms between:
- pins 1 and 2
- pins 1 and 3
- pins 2 and 3
- pin 2 and connector body
- pin 3 and connector body. R The insulation resistance must be higher than 20 Megohms.
(4) Make sure that the connector and the receptacle are clean and clear of unwanted material.
(5) Connect the EVMU harness to the TRF vibration sensor connector. Fully tighten by hand. Use soft-nose connector pliers only if necessary.
(6) Make sure that the aircraft harness connector is fully engaged and does not move.
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Check of the TRF Vibration Sensor
Figure 501/TASK 77-31-30-991-301
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________ Subtask 77-31-30-410-059
A. Close Access
(1) Make sure that the work area is clean and clear of tool(s) and other items.
(2) Close the left thrust reverser door: (Ref. TASK 78-36-00-410-040). FOR 1000EM1 451AL FOR 1000EM2 461AL
(3) Remove the access platform(s). Subtask 77-31-30-440-053
B. Make the thrust reverser serviceable (Ref. TASK 78-30-00-081-041). Subtask 77-31-30-410-060
C. Close Access
(1) Close the fan cowl doors: (Ref. TASK 71-13-00-410-040)
FOR 1000EM1
437AL, 438AR
FOR 1000EM2
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