DOC AIRBUS | AMM A320FManual Operation Check of the Variable Bleed Valve Doors [CFMI]
TASK 75-31-00-200-001-A
Manual Operation Check of the Variable Bleed Valve Doors
1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Work Zones and Access Panels
C. Referenced Information
3. Job Set-up
Subtask 75-31-00-941-065-A ** ON A/C NOT FOR ALL
Subtask 75-31-00-010-078-A ** ON A/C NOT FOR ALL
Subtask 75-31-00-410-076-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.02 06:36:55 UTC
Manual Operation Check of the Variable Bleed Valve Doors
1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | AR | ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE |
| No specific | AR | WARNING NOTICE(S) |
| 856A2501 | 1 | WRENCH-VBV MANUAL CONTROL |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| FOR [1000EM1] (ENGINE-1) | |
| 437AL, 438AR, 451AL, 452AR | |
| FOR [1000EM2] (ENGINE-2) | |
| 447AL, 448AR, 461AL, 462AR | |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 71-13-00-010-040-A | Opening of the Fan Cowl Doors |
| TASK 71-13-00-410-040-A | Closing of the Fan Cowl Doors |
| TASK 72-23-00-000-005-A | Removal of the Fan Duct Panels |
| TASK 72-23-00-400-005-A | Installation of the Fan Duct Panels |
| TASK 78-30-00-081-041-A | Make the Thrust Reverser Serviceable after Maintenance |
| TASK 78-30-00-481-041-A | Make the Thrust Reverser Unserviceable for Maintenance |
| TASK 78-36-00-010-040-A | Opening of the Thrust Reverser Doors |
| TASK 78-36-00-410-040-A | Closing of the Thrust Reverser Doors |
Subtask 75-31-00-941-065-A ** ON A/C NOT FOR ALL
A. Safety Precautions
(1) On the center pedestal, on the ENG panel 115VU:
(a) Put a WARNING NOTICE(S) 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(S) to tell persons not to energize the FADEC 1(2).
Subtask 75-31-00-010-076-A ** ON A/C NOT FOR ALL (1) On the center pedestal, on the ENG panel 115VU:
(a) Put a WARNING NOTICE(S) 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(S) to tell persons not to energize the FADEC 1(2).
B. Get Access
(1) Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-040):
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR
(2) Put the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position.
Subtask 75-31-00-040-060-A ** ON A/C NOT FOR ALL Subtask 75-31-00-010-077-A ** ON A/C NOT FOR ALL (1) Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-040):
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR
(2) Put the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position.
D. Open the thrust reverser doors (Ref. AMM TASK 78-36-00-010-040):
(1) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(2) FOR [1000EM2] (ENGINE-2)
461AL 462AR
4. Procedure(1) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(2) FOR [1000EM2] (ENGINE-2)
461AL 462AR
Subtask 75-31-00-010-078-A ** ON A/C NOT FOR ALL
A. Remove the fan duct panel, on the left or right of the No. 4 strut (Ref. AMM TASK 72-23-00-000-005).
Subtask 75-31-00-710-052-A ** ON A/C NOT FOR ALL B. Operational check of the VBV system.
(1) Engage the 856A2501 WRENCH-VBV MANUAL CONTROL (856A2501G01) in the free end of the half of the VBV linkage system.
(2) Operate the system manually in the two directions, and make sure that it operates smoothly and freely.
(3) With the VBV actuators manually positioned on the "CLOSED" stop, verify that the sensor arm of the VBV position sensor (RVDT) is well aligned with the reference mark.
(4) Check of the VBV position (only with AIDS option)
(a) On the MCDU main menu page, push the line key adjacent to the AIDS indication.
(b) On the AIDS menu page, push the line key adjacent to the PARAM ALPHA CALL-UP indication.
(c) On the AIDS PARAM ALPHA CALL-UP page, make sure that VBV is between -0.8 and 0.0 degrees.
Subtask 75-31-00-410-075-A ** ON A/C NOT FOR ALL 5. Close-up(1) Engage the 856A2501 WRENCH-VBV MANUAL CONTROL (856A2501G01) in the free end of the half of the VBV linkage system.
(2) Operate the system manually in the two directions, and make sure that it operates smoothly and freely.
(3) With the VBV actuators manually positioned on the "CLOSED" stop, verify that the sensor arm of the VBV position sensor (RVDT) is well aligned with the reference mark.
(4) Check of the VBV position (only with AIDS option)
(a) On the MCDU main menu page, push the line key adjacent to the AIDS indication.
(b) On the AIDS menu page, push the line key adjacent to the PARAM ALPHA CALL-UP indication.
(c) On the AIDS PARAM ALPHA CALL-UP page, make sure that VBV is between -0.8 and 0.0 degrees.
Subtask 75-31-00-410-076-A ** ON A/C NOT FOR ALL
A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the thrust reverser doors (Ref. AMM TASK 78-36-00-410-040):
(a) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(b) FOR [1000EM2] (ENGINE-2)
461AL 462AR
Subtask 75-31-00-440-060-A ** ON A/C NOT FOR ALL Subtask 75-31-00-410-077-A ** ON A/C NOT FOR ALL (1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the thrust reverser doors (Ref. AMM TASK 78-36-00-410-040):
(a) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(b) FOR [1000EM2] (ENGINE-2)
461AL 462AR