DOC AIRBUS | AMM A320FRemoval of the Transient Bleed Valve (TBV) [CFML]
TASK 75-33-05-000-801-A
Removal of the Transient Bleed Valve (TBV)
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 75-33-05-941-050-A
[Rev.10 from 2021]
2026.04.01 03:15:05 UTC
Removal of the Transient Bleed Valve (TBV)
WARNING:
BE CAREFUL WHEN YOU DO WORK ON THE ENGINE PARTS AFTER THE ENGINE SHUTDOWN. USE APPLICABLE THERMAL GLOVES. THE ENGINE PARTS CAN STAY HOT FOR ONE HOUR AFTER SHUTDOWN AND CAN BURN YOU.
1. Reason for the JobSelf explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | 1 | ACCESS PLATFORM 1M(3 FT) |
| No specific | AR | CAP - PROTECTION |
| No specific | 1 | CONTAINER 5 L (1.32 USGAL) |
| No specific | AR | COVER - PROTECTION |
| No specific | AR | WARNING NOTICE(S) |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 210 | CKPT,FWD COMPT BHD TO FLT COMPT BULKHEAD |
| 400 | POWER PLANT, NACELLES AND PYLONS |
| FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1) | |
| 437AL, 438AR, 452AR | |
| FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2) | |
| 447AL, 448AR, 462AR | |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 70-70-00-910-804-A | Electrical Standard Practices |
| TASK 71-13-00-010-803-A | Opening of the Fan Cowl Doors |
| TASK 78-30-00-040-809-A | Deactivation of the Thrust Reverser System for Ground Maintenance |
| TASK 78-36-00-010-806-A | Opening of the Thrust Reverser Cowl Doors |
Transient Bleed Valve (TBV) (PRE and POST SB 72-0169, PRE and POST SB 72-0190)Subtask 75-33-05-941-050-A
A. Safety Precautions
(1) On the center pedestal, on ENG panel 115VU:
(a) Make sure that the ENG/MODE selector switch is in the NORM position.
(b) Make sure that the ENG/MASTER 1(2) control switch was in the OFF position not less than five minutes before you do this procedure.
(c) Put WARNING NOTICE(S) in position to tell persons not to operate:
(a) Make sure that the ON legend of the FADEC GND PWR/1(2) pushbutton switch is off.
(b) Put a WARNING NOTICE(S) in position to tell persons not to energize FADEC 1(2).
Subtask 75-33-05-010-050-A (1) On the center pedestal, on ENG panel 115VU:
(a) Make sure that the ENG/MODE selector switch is in the NORM position.
(b) Make sure that the ENG/MASTER 1(2) control switch was in the OFF position not less than five minutes before you do this procedure.
(c) Put WARNING NOTICE(S) in position to tell persons not to operate:
- The ENG/MODE selector switch, and
- The ENG/MASTER 1(2) control switch.
(a) Make sure that the ON legend of the FADEC GND PWR/1(2) pushbutton switch is off.
(b) Put a WARNING NOTICE(S) in position to tell persons not to energize FADEC 1(2).
B. Get Access
(1) Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-803):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL 448AR
Subtask 75-33-05-040-050-A (1) Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-803):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL 448AR
C. Deactivation of the Thrust Reverser System for Maintenance
Subtask 75-33-05-010-051-A WARNING:
YOU MUST DEACTIVATE THE THRUST REVERSER BEFORE YOU DO WORK ON OR AROUND IT. IF YOU DO NOT, THE THRUST REVERSER CAN OPERATE ACCIDENTALLY AND CAUSE AN INJURY AND/OR DAMAGE.
(1) Do the deactivation of the thrust reverser system for maintenance (Ref. AMM TASK 78-30-00-040-809). D. Open the right thrust reverser cowl-door (Ref. AMM TASK 78-36-00-010-806):
(1) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
452AR
(2) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
462AR
(3) Make sure that the ACCESS PLATFORM 1M(3 FT) is in position.
4. Procedure(1) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
452AR
(2) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
462AR
(3) Make sure that the ACCESS PLATFORM 1M(3 FT) is in position.
WARNING:
BE CAREFUL NOT TO GET AIRCRAFT FUEL IN YOUR MOUTH OR IN YOUR EYES.
IF YOU GET FUEL ON YOUR SKIN OR ON YOUR CLOTHES, FLUSH IT IMMEDIATELY WITH WATER.
IF NECESSARY, GET MEDICAL HELP.
AIRCRAFT FUEL IS POISONOUS.
Subtask 75-33-05-020-050-A A. Removal of the TBV
(1) Disconnect the HJ8A harness electrical connector (5) from the TBV (1) (Ref. AMM TASK 70-70-00-910-804).
(2) Disconnect the fuel manifold (2) and the fuel manifold (3) from the TBV (1) as follows:
(a) Put a CONTAINER 5 L (1.32 USGAL) below the fuel manifold and the drain tube connections of the TBV (1).
(b) Disconnect the fuel manifold (3) from the C1 fitting of the TBV (1).
(c) Disconnect the fuel manifold (2) from the C2 fitting of the TBV (1).
(3) Disconnect the drain tube (4) from the TBV (1).
PRE SB 72-0190
(4) Remove the four bolts (10) that attach the air tube (11) to the bracket (9).
(5) Loosen the four bolts (13) that attach the air tube (7) to the bracket (12).
PRE SB 72-0169
(6) Loosen the V-band coupling (16) that attaches the air tube (11) to the air tube (18).
END OF PRE SB 72-0169
END OF PRE SB 72-0190
POST SB 72-0190
(7) Remove the two bolts (20) that attach the air tube (11) to the bracket (21).
END OF POST SB 72-0190
(8) Loosen the V-band coupling (17) that attaches the air tube (11) to the air tube (19).
(9) Remove the V-band coupling (14) that attaches the TBV (1) to the air tube (11).
(10) Hold the TBV (1) and remove the V-band coupling (8) that attaches the TBV (1) to the air tube (7).
(11) Remove the TBV (1) from the engine.
(12) Remove and discard the seal (6) and the seal (15).
(13) Install the COVER - PROTECTION and the CAP - PROTECTION on all the open ports, open tubes, open hoses and the disconnected connectors.
Subtask 75-33-05-620-050-A (1) Disconnect the HJ8A harness electrical connector (5) from the TBV (1) (Ref. AMM TASK 70-70-00-910-804).
(2) Disconnect the fuel manifold (2) and the fuel manifold (3) from the TBV (1) as follows:
(a) Put a CONTAINER 5 L (1.32 USGAL) below the fuel manifold and the drain tube connections of the TBV (1).
(b) Disconnect the fuel manifold (3) from the C1 fitting of the TBV (1).
(c) Disconnect the fuel manifold (2) from the C2 fitting of the TBV (1).
(3) Disconnect the drain tube (4) from the TBV (1).
PRE SB 72-0190
(4) Remove the four bolts (10) that attach the air tube (11) to the bracket (9).
(5) Loosen the four bolts (13) that attach the air tube (7) to the bracket (12).
PRE SB 72-0169
(6) Loosen the V-band coupling (16) that attaches the air tube (11) to the air tube (18).
END OF PRE SB 72-0169
END OF PRE SB 72-0190
POST SB 72-0190
(7) Remove the two bolts (20) that attach the air tube (11) to the bracket (21).
END OF POST SB 72-0190
(8) Loosen the V-band coupling (17) that attaches the air tube (11) to the air tube (19).
(9) Remove the V-band coupling (14) that attaches the TBV (1) to the air tube (11).
(10) Hold the TBV (1) and remove the V-band coupling (8) that attaches the TBV (1) to the air tube (7).
(11) Remove the TBV (1) from the engine.
(12) Remove and discard the seal (6) and the seal (15).
(13) Install the COVER - PROTECTION and the CAP - PROTECTION on all the open ports, open tubes, open hoses and the disconnected connectors.
B. Preservation of the TBV
(1) In the instance of shipping or prolonged storage, preserve the TBV (1) per theCMM 753305 .
(1) In the instance of shipping or prolonged storage, preserve the TBV (1) per the