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TASK 75-31-00-820-001
Adjustment of the Reference CLOSED Position of the VBV System
1. Reason for the Job
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Self Explanatory
2. Job Set-up Information
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A. Fixtures, Tools, Test and Support Equipment
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REFERENCE QTY DESIGNATION
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No specific warning notice
No specific access platform 1.5 m (4 ft. 11 in.)
856A2501 1 WRENCH - VBV MANUAL CONTROL
856A2664 1 GAGE, SETTING - VBV DOORS
B. Referenced Information
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REFERENCE DESIGNATION
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71-13-00-010-040 Opening of the Fan Cowl Doors
71-13-00-410-040 Closing of the Fan Cowl Doors
72-23-00-000-027 Removal of the Fan Duct Panels
72-23-00-400-027 Installation of the Fan Duct Panels
75-31-20-000-002 Removal of the Bleed Valve Stop Mechanism
75-31-20-400-002 Installation of the Bleed Valve Stop Mechanism
75-31-30-000-001 Removal of a VBV Inter-connecting Flexible Shaft
(Typical). 75-31-30-400-001 Installation of a VBV Inter-connecting Flexible Shaft (Typical) 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
75-31-00-991-300 Fig. 501
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__________ Subtask 75-31-00-941-061
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 75-31-00-010-062
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 75-31-00-040-056
C. Make the thrust reverser unserviceable (Ref. TASK 78-30-00-481-041). Subtask 75-31-00-010-064
D. Get Access
(1) Open the thrust reverser doors (Ref. TASK 78-36-00-010-040): FOR 1000EM1 451AL, 452AR FOR 1000EM2 461AL, 462AR
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(2) If applicable, remove the fan duct panels (Ref. TASK 72-23-00-000-027).
4. Procedure
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(Ref. Fig. 501/TASK 75-31-00-991-300) Subtask 75-31-00-820-050
A. Adjustment of the Reference CLOSED Position of the VBV System
(1) Adjust the reference CLOSED position of a VBV door (TYPICAL).
(a) If applicable, disengage the flexible shafts ends from the VBV door sockets (Ref. TASK 75-31-30-000-001).
(b) Turn the flexible shaft socket of the ballscrew actuator by hand or with WRENCH - VBV MANUAL CONTROL (856A2501G01) to completely close the VBV door.
(c) Install the GAGE, SETTING - VBV DOORS (856A2664G01) as follows:
(d) Turn the flexible shaft socket to open the VBV door until the GAGE, SETTING - VBV DOORS (856A2664G01) yoke engages on the flexible shaft socket.
(e) Remove the GAGE, SETTING - VBV DOORS (856A2664G01) after installation of the flexible shafts (Ref. TASK 75-31-30-400-001).
(f) If applicable, use the same procedure to adjust the other VBV doors reference CLOSED position.
(2) Set the VBV stop mechanism to the CLOSED position as follows:
(a) Disengage the flexible shafts ends from the master VBV door and ballscrew actuator (Ref. TASK 75-31-30-000-001).
(b) With the WRENCH - VBV MANUAL CONTROL (856A2501G01), close the master VBV door and ballscrew actuator. 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 AIR 空氣(38)
