DOC AIRBUS | AMM A320FInstallation of the Exhaust Front Plug [CFML]
TASK 78-11-40-400-801-A
Installation of the Exhaust Front Plug
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Consumable Materials
C. Work Zones and Access Panels
D. Referenced Information
3. Job Set-up
Subtask 78-11-40-941-051-A
Subtask 78-11-40-420-050-A
Subtask 78-11-40-410-052-A Subtask 78-11-40-440-050-A
[Rev.10 from 2021]
2026.04.01 13:04:27 UTC
Installation of the Exhaust Front Plug
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.
WARNING:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
ZONE: 400
1. Reason for the JobSelf explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | 1 | STEPLADDER 0.5 M (1.6 FT) |
| No specific | AR | WARNING NOTICE(S) |
| No specific | 1 | WRENCH - TORQUE, DIAL TYPE |
| No specific | Torque wrench: range to between 3.26 and 2.86 m.daN (24.04 and 21.09 lbf.ft )  | |
| 98N7810H004-000 | 1 | EXHAUST SHOCK ABSORBER |
| 98N7810H005-000 | 1 | FORWARD PLUG PROTECTION RUG |
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.CPNCL00378) | never-seez pure nickel special |
| (Material No.CPNCL02069) | textile - lint free cotton |
| (Material No.CPNCL02589) | Diestone DLS |
| No specific | 03PBD1 |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 400 | POWER PLANT, NACELLES AND PYLONS |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 70-24-00-910-814-A | Standard Torque Recommendations |
| TASK 78-11-41-000-803-A | Removal of the Exhaust Rear Plug |
| TASK 78-11-41-400-803-A | Installation of the Exhaust Rear Plug |
| TASK 78-30-00-040-807-A | Deactivation of the Thrust Reverser System for Nacelle Maintenance (ICU) |
| TASK 78-30-00-440-807-A | Reactivation of the Thrust Reverser System after Nacelle Maintenance (ICU) |
Exhaust Front PlugSubtask 78-11-40-941-051-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) Make sure that the WARNING NOTICE(S) are 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) Make sure that the WARNING NOTICE(S) is in position to tell persons not to energize FADEC 1(2).
(3) Make sure that the STEPLADDER 0.5 M (1.6 FT) is in position.
Subtask 78-11-40-040-051-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) Make sure that the WARNING NOTICE(S) are 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) Make sure that the WARNING NOTICE(S) is in position to tell persons not to energize FADEC 1(2).
(3) Make sure that the STEPLADDER 0.5 M (1.6 FT) is in position.
B. Deactivation of the Thrust Reverser System for Nacelle Maintenance
Subtask 78-11-40-010-056-A 4. ProcedureWARNING:
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) Make sure that you did the deactivation of the thrust reverser system for nacelle maintenance (Ref. AMM TASK 78-30-00-040-807). Subtask 78-11-40-420-050-A
A. Installation of the Protection
(1) Make sure that the 98N7810H004-000 EXHAUST SHOCK ABSORBER is installed on the lower area of the exhaust nozzle.
(2) Make sure that the 98N7810H005-000 FORWARD PLUG PROTECTION RUG is installed inside the front plug duct lower area.
Subtask 78-11-40-420-051-A (1) Make sure that the 98N7810H004-000 EXHAUST SHOCK ABSORBER is installed on the lower area of the exhaust nozzle.
(2) Make sure that the 98N7810H005-000 FORWARD PLUG PROTECTION RUG is installed inside the front plug duct lower area.
B. Installation of the Exhaust Front Plug
(2) Do a check for the maximum locking torque for each captive nut (4):
(a) Turn the bolt (2) with your hand until the self-locking device is engaged.
(b) Turn the fastener until the self-locking device is fully engaged.
(c) Use a WRENCH - TORQUE, DIAL TYPE to measure the maximum locking torque value of the bolt (2).
(3) Do a check for the minimum locking torque for each captive nut (4):
(a) Use a WRENCH - TORQUE, DIAL TYPE to loosen the bolt (2).
(4) Clean the fasteners with a textile - lint free cotton (Material No.CPNCL02069) made moist with Diestone DLS (Material No.CPNCL02589) .
(5) Remove the exhaust front plug (1) from the 98N7810H001-000 EXHAUST DOLLY.
(6) Put the exhaust front plug in position.
(7) Apply 03PBD1 or never-seez pure nickel special (Material No.CPNCL00378) on the threads and the mating surface of each bolt (2).
(a) Install the washers (3) and the bolts (2) at bolt positions 8, 23, 30 and 15.
(b) TORQUE the bolts (2) at bolt positions 8, 23, 30 and 15 to between 3.26 and 2.86 m.daN (24.04 and 21.09 lbf.ft ) in a clockwise direction.
(d) TORQUE the remaining bolts (2) to between 3.26 and 2.86 m.daN (24.04 and 21.09 lbf.ft ).
(e) Loosen and TORQUE each bolt (2) to between 3.26 and 2.86 m.daN (24.04 and 21.09 lbf.ft ).
(9) Remove the 98N7810H004-000 EXHAUST SHOCK ABSORBER and the 98N7810H005-000 FORWARD PLUG PROTECTION RUG.
5. Close-upWARNING:
MAKE SURE THAT THE EXHAUST FRONT PLUG CANNOT FALL AFTER THE REMOVAL OF ALL THE FASTENERS. THE EXHAUST FRONT PLUG WEIGHS 18 KG (39.68 LB).
WARNING:
TWO MECHANICS ARE NECESSARY TO REMOVE AND INSTALL THE EXHAUST FRONT PLUG. ONE MUST HOLD THE END OF THE EXHAUST FRONT PLUG ASSEMBLY WHILE THE OTHER MUST REMOVE OR INSTALL THE BOLTS AND WASHERS. THE EXHAUST FRONT PLUG ASSEMBLY WEIGHS 18KG (39.68 LBS).
(1) Clean the engine and the exhaust front plug flanges area with a textile - lint free cotton (Material No.CPNCL02069) made moist with Diestone DLS (Material No.CPNCL02589) . (2) Do a check for the maximum locking torque for each captive nut (4):
(a) Turn the bolt (2) with your hand until the self-locking device is engaged.
(b) Turn the fastener until the self-locking device is fully engaged.
(c) Use a WRENCH - TORQUE, DIAL TYPE to measure the maximum locking torque value of the bolt (2).
NOTE: A minimum of one and a half threads of the bolt (2) must extend more than the captive nut (4) to record the locking torque value.
(d) Make sure that the maximum locking TORQUE value of the bolt (2) is not more than 0.339 m.daN (30.00 lbf.in) (Ref. AMM TASK 70-24-00-910-814). (3) Do a check for the minimum locking torque for each captive nut (4):
(a) Use a WRENCH - TORQUE, DIAL TYPE to loosen the bolt (2).
NOTE: A minimum of one and a half threads of the bolt (2) must extend more than the captive nut (4) to record the locking torque value.
(b) Make sure that the minimum breakaway TORQUE value necessary to turn the bolt (2) is more than 0.04 m.daN (3.54 lbf.in) (Ref. AMM TASK 70-24-00-910-814). (4) Clean the fasteners with a textile - lint free cotton (Material No.CPNCL02069) made moist with Diestone DLS (Material No.CPNCL02589) .
(5) Remove the exhaust front plug (1) from the 98N7810H001-000 EXHAUST DOLLY.
(6) Put the exhaust front plug in position.
CAUTION:
BE CAREFUL NOT TO CAUSE DAMAGE TO THE CENTERING DEVICE DURING INSTALLATION OF THE EXHAUST FRONT PLUG.
(a) Put the exhaust front plug (1) in position on the engine flange carefully to align the spigot. (7) Apply 03PBD1 or never-seez pure nickel special (Material No.CPNCL00378) on the threads and the mating surface of each bolt (2).
CAUTION:
OBEY THE BOLT INSTALLATION SEQUENCE. IF YOU DO NOT, DAMAGE TO EQUIPMENT CAN OCCUR.
(8) Install the bolts. (a) Install the washers (3) and the bolts (2) at bolt positions 8, 23, 30 and 15.
(b) TORQUE the bolts (2) at bolt positions 8, 23, 30 and 15 to between 3.26 and 2.86 m.daN (24.04 and 21.09 lbf.ft )
in a clockwise direction. NOTE: A long adaptor can be used to position the wrench outside the plug and increase this way the arm lever.
NOTE: Continue to install the bolts clockwise or counterclockwise in remaining positions.
(c) Install the washers (3) and the bolts (2) at the remaining positions. (d) TORQUE the remaining bolts (2) to between 3.26 and 2.86 m.daN (24.04 and 21.09 lbf.ft )
. (e) Loosen and TORQUE each bolt (2) to between 3.26 and 2.86 m.daN (24.04 and 21.09 lbf.ft )
. (9) Remove the 98N7810H004-000 EXHAUST SHOCK ABSORBER and the 98N7810H005-000 FORWARD PLUG PROTECTION RUG.
Subtask 78-11-40-410-052-A Subtask 78-11-40-440-050-A
B. Do the reactivation of the thrust reverser after nacelle maintenance (Ref. AMM TASK 78-30-00-440-807).
Subtask 78-11-40-410-051-A C. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the access platform(s).
(3) Remove the WARNING NOTICE(S).
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the access platform(s).
(3) Remove the WARNING NOTICE(S).