DOC AIRBUS | AMM A320FRemoval of the Cap on the Port in the High-Pressure-Turbine 7th-Stage Cooling-Air-Manifold
TASK 29-14-13-000-804-A
Removal of the Cap on the Port in the High-Pressure-Turbine 7th-Stage Cooling-Air-Manifold
This procedure is applicable only for engine 2.
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 29-14-13-860-057-A
Subtask 29-14-13-020-054-A
[Rev.10 from 2021]
2026.04.01 00:24:21 UTC
Removal of the Cap on the Port in the High-Pressure-Turbine 7th-Stage Cooling-Air-Manifold
WARNING:
OBEY THE HYDRAULIC SAFETY PROCEDURES.
WARNING:
MAKE SURE THAT THE PNEUMATIC SYSTEM IS DEPRESSURIZED BEFORE YOU START WORK. PRESSURIZED AIR CAN CAUSE INJURY TO PERSONNEL.
WARNING:
DO NOT TOUCH THE HYDRAULIC SYSTEM COMPONENTS FOR A SHORT TIME AFTER THE ENGINE IS SHUTDOWN. THE ENGINE COMPONENTS STAY HOT FOR SOME TIME AND CAN CAUSE INJURY.
ZONE: 460
1. Reason for the JobThis procedure is applicable only for engine 2.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | 1 | ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE |
| No specific | AR | CAP - PROTECTION |
| No specific | AR | WARNING NOTICE(S) |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 460 | ENG 2 THRUST REVERSER & EXHAUST SECTION |
| 195BB, 197CB, 197EB, 198CB | |
| FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2) | |
| 447AL, 448AR, 461AL | |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 29-10-00-864-001-A | Depressurize the Green Hydraulic System |
| TASK 29-10-00-864-002-A | Depressurize the Yellow Hydraulic System |
| TASK 29-10-00-864-003-A | Depressurize the Blue Hydraulic System |
| TASK 29-14-00-614-001-A | Depressurization of the Hydraulic Reservoirs |
| TASK 71-13-00-010-803-A | Opening of the Fan Cowl Doors |
| TASK 78-30-00-040-807-A | Deactivation of the Thrust Reverser System for Nacelle Maintenance (ICU) |
| TASK 78-36-00-010-806-A | Opening of the Thrust Reverser Cowl Doors |
Cap on the Port in the High-Pressure-Turbine 7th-Stage Cooling-Air-ManifoldSubtask 29-14-13-860-057-A
A. Aircraft Maintenance Configuration
(1) Make sure that the hydraulic systems are depressurized
(Ref. AMM TASK 29-10-00-864-001) (Ref. AMM TASK 29-10-00-864-002) (Ref. AMM TASK 29-10-00-864-003).
(2) Depressurize the hydraulic reservoirs (Ref. AMM TASK 29-14-00-614-001).
(3) Open access doors 197CB, 197EB and 198CB:
(a) Put the WARNING NOTICE(S) in position to tell persons not to pressurize the Green, Blue and Yellow hydraulic systems:
1 On the ground service panel of the Green hydraulic system.
2 On the ground service panel of the Blue hydraulic system.
3 On the ground service panel of the Yellow hydraulic system.
(4) Open access door 195BB:
(a) Put the WARNING NOTICE(S) in position to tell persons not to pressurize the hydraulic reservoirs.
Subtask 29-14-13-941-057-A (1) Make sure that the hydraulic systems are depressurized
(Ref. AMM TASK 29-10-00-864-001) (Ref. AMM TASK 29-10-00-864-002) (Ref. AMM TASK 29-10-00-864-003).
(2) Depressurize the hydraulic reservoirs (Ref. AMM TASK 29-14-00-614-001).
(3) Open access doors 197CB, 197EB and 198CB:
(a) Put the WARNING NOTICE(S) in position to tell persons not to pressurize the Green, Blue and Yellow hydraulic systems:
1 On the ground service panel of the Green hydraulic system.
2 On the ground service panel of the Blue hydraulic system.
3 On the ground service panel of the Yellow hydraulic system.
(4) Open access door 195BB:
(a) Put the WARNING NOTICE(S) in position to tell persons not to pressurize the hydraulic reservoirs.
B. Safety Precautions
(1) Make sure that the engine shutdown occurred five minutes or more before you do this procedure.
(2) On AIR COND panel 30VU:
(a) Make sure that the APU-BLEED pushbutton-switch ON-legend is off.
(b) Make sure that ENG 1(2) BLEED pushbutton-switch OFF-legend is on.
(c) Put the WARNING NOTICE(S) in position to tell persons not to operate the pneumatic system.
(3) On the HYD section of HYD/FUEL panel 40VU:
(a) Put the WARNING NOTICE(S) in position to tell persons not to pressurize the Green, Blue and Yellow hydraulic systems.
(4) On the ENG section of maintenance panel 50VU:
(a) Make sure that ENG/FADEC GND PWR 1(2) pushbutton-switch ON-legend is off.
(b) Put the WARNING NOTICE(S) in position to tell persons not to energize FADEC 1(2).
(5) 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 ENG/MASTER 1(2) control switch is in the OFF position not less than five minutes before you do this procedure.
(c) Put the WARNING NOTICE(S) in position to tell persons not to operate the ENG/MODE selector switch and ENG/MASTER 1(2) control switch.
(6) Put the WARNING NOTICE(S) in position to tell persons not to pressurize the pneumatic system:
(a) On the high-pressure ground connectors
(b) On the access door 191DB.
Subtask 29-14-13-010-059-A (1) Make sure that the engine shutdown occurred five minutes or more before you do this procedure.
(2) On AIR COND panel 30VU:
(a) Make sure that the APU-BLEED pushbutton-switch ON-legend is off.
(b) Make sure that ENG 1(2) BLEED pushbutton-switch OFF-legend is on.
(c) Put the WARNING NOTICE(S) in position to tell persons not to operate the pneumatic system.
(3) On the HYD section of HYD/FUEL panel 40VU:
(a) Put the WARNING NOTICE(S) in position to tell persons not to pressurize the Green, Blue and Yellow hydraulic systems.
(4) On the ENG section of maintenance panel 50VU:
(a) Make sure that ENG/FADEC GND PWR 1(2) pushbutton-switch ON-legend is off.
(b) Put the WARNING NOTICE(S) in position to tell persons not to energize FADEC 1(2).
(5) 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 ENG/MASTER 1(2) control switch is in the OFF position not less than five minutes before you do this procedure.
(c) Put the WARNING NOTICE(S) in position to tell persons not to operate the ENG/MODE selector switch and ENG/MASTER 1(2) control switch.
(6) Put the WARNING NOTICE(S) in position to tell persons not to pressurize the pneumatic system:
(a) On the high-pressure ground connectors
(b) On the access door 191DB.
C. Get Access
(1) Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-803):
(a) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL, 448AR.
Subtask 29-14-13-040-054-A (1) Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-803):
(a) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL, 448AR.
D. Deactivation of the Thrust Reverser for Maintenance
Subtask 29-14-13-010-061-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 78-30-00-040-807). E. Get Access
(1) Open the thrust-reverser cowl doors (Ref. AMM TASK 78-36-00-010-806):
(a) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
461AL.
(2) Put the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position on the left side of the engine.
4. Procedure(1) Open the thrust-reverser cowl doors (Ref. AMM TASK 78-36-00-010-806):
(a) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
461AL.
(2) Put the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position on the left side of the engine.
Subtask 29-14-13-020-054-A
A. Removal of the Cap
(1) Remove the cap (1) from the port on the high-pressure-turbine 7th-stage cooling-air-manifold (2).
(2) Install the CAP - PROTECTION on the all open ports, tubes and hoses.
(1) Remove the cap (1) from the port on the high-pressure-turbine 7th-stage cooling-air-manifold (2).
(2) Install the CAP - PROTECTION on the all open ports, tubes and hoses.