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(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 75-31-60-010-052
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 75-31-60-040-052
C. Make the thrust reverser unserviceable (Ref. TASK 78-30-00-481-041).
Subtask 75-31-60-010-056
D. Open the thrust reverser doors (Ref. TASK 78-36-00-010-040):
FOR 1000EM1
451AL, 452AR
FOR 1000EM2
461AL, 462AR
4. Procedure
_________
(Ref. Fig. 401/TASK 75-31-60-991-300)
Subtask 75-31-60-010-053
A. Remove the fan duct panel corresponding to the Variable Bleed Valve (VBV) door to be removed, and the 2 adjacent panels (Ref. TASK 72-23-00-000-027).
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Bleed Valve and Ballscrew Actuator Assembly
Figure 401/TASK 75-31-60-991-300
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Subtask 75-31-60-820-055
R B. Set the VBV to the CLOSED position (Ref. TASK 75-31-20-820-001).
Subtask 75-31-60-020-051
C. Removal of the Bleed Valve and Ballscrew Actuator Assembly
(1) Remove flexible shaft (10) as follows:
(a) Push the flexible shaft clockwise to compress the spring, and disengage the opposite end from the VBV actuator.
(b) Remove the flexible shaft from the strut.
(2) Loosen the 2 upper horizontal (40) and the 2 lower vertical (30) captive bolts attaching bleed valve and ballscrew actuator (20) and remove assembly.
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Installation of the Bleed Valve and Ballscrew Actuator Assembly
1. Reason for the Job
__________________
Self Explanatory
2. Job Set-up Information
______________________
A. Fixtures, Tools, Test and Support Equipment
-------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific warning notice No specific access platform 1 m (3 ft. 3 in.) No specific Torque Wrench : range 36.00 to 220.00 lbf.in
(0.40 to 2.60 m.daN) 856A2501 1 WRENCH - VBV MANUAL CONTROL
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 72-23-00-400-027 Installation of the Fan Duct Panels 73-29-00-710-040 Operational Test of the FADEC on the Ground (with
Engine Motoring) 75-31-00-200-002 Manual Operation Check of the Variable Bleed Valve Doors 75-31-00-820-001 Adjustment of the Reference CLOSED Position of the VBV System 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 75-31-60-991-300 Fig. 401
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3. Job Set-up
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Subtask 75-31-60-860-051
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). 中國航空網 m.k6050.com 航空翻譯 www.aviation.cn 本文鏈接地址：A320飛機維護手冊 AMM AIR 空氣(59)
