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C. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
20-21-11-911-001 Tightening Torques for Standard Threaded Fasteners 71-13-00-010-040 Opening of the Fan Cowl Doors 71-13-00-410-040 Closing of the Fan Cowl Doors 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 71-22-11-991-300 Fig. 401 71-22-11-991-302 Fig. 402 71-22-11-991-303 Fig. 403 71-22-11-991-304 Fig. 404
3. Job Set-up
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Subtask 71-22-11-860-052
A. Aircraft Maintenance Configuration
(1) On the center pedestal, on the ENG panel 115VU, make sure that a warning notice is in position to tell persons not to start the engine.
(2) On the overhead maintenance panel 50VU, make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off. Make sure that a warning notice is in position to tell persons not to energize the FADEC 1(2).
(3) Make sure that the access platform is in position.
(4) Make sure that the slats are retracted and install TOOL-ZERO LOCKING, FLAP SLAT CTL LEVER (98D27803500001) on the flap and slat control lever.
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B. Get Access
(1) Make sure that the fan cowl doors are open (Ref. TASK 71-13-00-010-040): FOR 1000EM1 437AL, 438AR FOR 1000EM2 447AL, 448AR
(2) Make sure that the thrust reverser doors are open to the 45 degrees position (Ref. TASK 78-36-00-010-040): FOR 1000EM1 451AL, 452AR FOR 1000EM2 461AL, 462AR
Subtask 71-22-11-040-053
C. Make sure that the thrust reverser is unserviceable (Ref. TASK 78-30-00-481-041).
4. Procedure
_________ (Ref. Fig. 401/TASK 71-22-11-991-300, 402/TASK 71-22-11-991-302, 403/TASK 71-22-11-991-303, 404/TASK 71-22-11-991-304) Subtask 71-22-11-210-054
A. Check Before Installation CAUTION : DO A DETAILED VISUAL INSPECTION OF THE AFT MOUNT RETAINING PINS
_______ AND RETAINERS TO MAKE SURE THAT THEIR CONDITION IS CORRECT.
(1) Check aft engine mount for condition and security. Subtask 71-22-11-110-051
B. Cleaning
(Ref. Fig. 403/TASK 71-22-11-991-303)
(1) Clean bolts (135) and nuts (155) with trichloroethylene (Material No. CP1008).
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Subtask 71-22-11-210-057
C. Make sure that there are no traces of excessive seizure or wear. Subtask 71-22-11-230-051 R D. Do a fluorescent penetrant inspection level 3 of the mount bolts. No R cracks are permitted. (Ref. CFMI Standard Practices Manual 70-32-13,
R 70-32-23). Subtask 71-22-11-869-053
E. Do a check of the running torque of the aft mount bolts as follows:
(1) Hand install bolts on barrel nuts until the bolts become hard to turn.
(2) With a torque wrench, screw bolt into barrel nut. Two threads must come out of the bottom of the barrel nut. The running torque must be 90 lbf.in (1.02 m.daN) minimum, 800 lbf.in (9.04 m.daN) maximum.
(3) Allow bolt and barrel nut cool for one minute.
(4) Use a torque wrench to loosen bolt from barrel nut. The break away torque must be 90 lbf.in (1.02 m.daN) minimum, 800 lbf.in (9.04 m.daN) maximum.
(5) If the barrel nut does not keep the correct running torque, replace the barrel nut and do again steps (1) through (4).
Subtask 71-22-11-110-054
F. Thoroughly clean the mating faces, the shear or locating pin holes and the fastener holes.
Subtask 71-22-11-420-053
G. Installation of the Aft Engine Mount
(1) Apply Silicone Lubricant (Material No. CP5063) to the bolts (135) threads, the washers (140), the nuts (155) and the pin holes.
(2) Put the center link in its installation position, on the engine case. 中國航空網 www.k6050.com 航空翻譯 www.aviation.cn 本文鏈接地址：A320飛機維護手冊 AMM 動力裝置 POWER PLANT 2(5)
