DOC AIRBUS | AMM A320FInstallation of the Exhaust Rear Plug [CFML]
TASK 78-11-41-400-803-A
Installation of the Exhaust Rear 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. Expendable Parts
E. Referenced Information
3. Job Set-up
Subtask 78-11-41-941-063-A
Subtask 78-11-41-420-053-A
(a) Clean the removed fasteners before you examine them.
(b) Make sure that the finish on the threads of the bolts (2) and the surfaces of the washers (3) are not damaged.
(c) Do a check for the maximum locking torque for each nut (4):
2 Use a TORQUE WRENCH, to measure the maximum locking torque value of the bolts (2).
4 If the maximum locking torque value is not in the limits, discard the nut (4) and install a new AIPC 78-11-80-20-070 NUT (4) with AIPC 78-11-80-20-060 RIVET (5) (Ref. AMM TASK 70-60-00-910-802).
(d) Do a check for the minimum breakaway torque for each nut (4):
1 Use a WRENCH - TORQUE to loosen the bolts (2).
3 If the minimum breakaway torque value is not in the limits, discard the nut (4) and install a new AIPC 78-11-80-20-070 NUT (4) with AIPC 78-11-80-20-060 RIVET (5) (Ref. AMM TASK 70-60-00-910-802).
(2) Installation of the exhaust rear plug (1).
(a) Clean the exhaust rear plug (1) and exhaust front plug flanges with a LINT-FREE COTTON CLOTH (Material No.CPNCL02069) made moist with GENERAL CLEANING AGENT - MULTI PURPOSE (Material No.CPNCL02589) .
(b) Apply lubricant Loctite 8009 (Material No.CPNCL02640) or NEVERSEEZ NICKEL SPECIAL GRADE (Material No.CPNCL00378) on the threads and the mating surface of each bolt (2).
(c) Remove the exhaust rear plug (1) from the 98N7810H001-000 EXHAUST DOLLY.
(d) Put the exhaust rear plug in position:
2 Push forward the rear plug against the front plug and hold this position until the first eight bolts are tightened.
(e) Installation of washers (3) and bolts (2):
2 TORQUE the bolts (2) at position numbers 1, 18, 10, 27, 5, 22, 31 and 14 to between 1.08 and 0.88 m.daN (95.58 and 77.88 lbf.in )
in accordance with this sequence.
3 Install the washers (3) and bolts (2) at the remaining positions in clockwise direction.
4 TORQUE the remaining bolts (2) to between 1.08 and 0.88 m.daN (95.58 and 77.88 lbf.in ) in a clockwise direction.
5 Do a second TORQUE application at bolt position numbers 1, 18, 10, 27, 5, 22, 31 and 14:
b TORQUE the bolt (2) to between 1.08 and 0.88 m.daN (95.58 and 77.88 lbf.in ).
6 Do a second TORQUE application at the remaining positions in clockwise direction:
b TORQUE the bolt (2) to between 1.08 and 0.88 m.daN (95.58 and 77.88 lbf.in ).
5. Close-up
Subtask 78-11-41-440-052-A
[Rev.10 from 2021]
2026.04.01 13:04:26 UTC
Installation of the Exhaust Rear 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
B. Consumable Materials
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.CPNCL00378) | NEVERSEEZ NICKEL SPECIAL GRADE |
| (Material No.CPNCL02069) | LINT-FREE COTTON CLOTH |
| (Material No.CPNCL02589) | GENERAL CLEANING AGENT - MULTI PURPOSE |
| (Material No.CPNCL02640) | Loctite 8009 |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 400 | POWER PLANT, NACELLES AND PYLONS |
| FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1) | |
| 437AL, 438AR | |
| FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2) | |
| 447AL, 448AR | |
| FIG.ITEM | DESIGNATION | IPC-CSN |
|---|---|---|
| 5 | RIVET | AIPC 78-11-80-20-060 |
| 4 | NUT | AIPC 78-11-80-20-070 |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 70-60-00-910-802-A | Standard Practices |
| TASK 71-13-00-010-803-A | Opening of the Fan Cowl Doors |
| TASK 71-13-00-410-803-A | Closing of the Fan Cowl Doors |
| TASK 72-59-12-400-802-A | Installation of the Center Vent Tube Support |
| 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 Rear PlugSubtask 78-11-41-941-063-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) is 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.
Subtask 78-11-41-010-063-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) is 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. Get Access
(1) Make sure that the fan cowl doors are open (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
(2) Make sure that the ACCESS PLATFORM 1M(3 FT) is in position.
Subtask 78-11-41-040-055-A (1) Make sure that the fan cowl doors are open (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
(2) Make sure that the ACCESS PLATFORM 1M(3 FT) is in position.
C. Deactivation of the Thrust Reverser System for Nacelle Maintenance
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 78-11-41-420-053-A
A. Installation of the Support Center Vent Tube on the Exhaust Rear Plug (Ref. AMM TASK 72-59-12-400-802).
Subtask 78-11-41-420-052-A NOTE: This operation is necessary, if you install an exhaust rear plug without support center vent tube installed.
WARNING:
BE CAREFUL WHEN YOU REMOVE OR INSTALL THE EXHAUST REAR PLUG. THE EXHAUST REAR PLUG WEIGHS APPROXIMATELY 15.43 LB (7 KG), INJURY TO PERSON AND/OR DAMAGE TO THE EQUIPMENT CAN OCCUR.
B. Installation of the Exhaust Rear Plug NOTE: Two persons are necessary to install exhaust rear plug.
NOTE: Do step 4.B.(1) only if you re-use the fasteners.
(1) Check the fastener to be installed on the exhaust rear plug: (a) Clean the removed fasteners before you examine them.
(b) Make sure that the finish on the threads of the bolts (2) and the surfaces of the washers (3) are not damaged.
(c) Do a check for the maximum locking torque for each nut (4):
NOTE: If you install new nut (4) then go to step 4.B.(2).
1 Turn the bolts (2) with your hand until the self-locking device is fully engaged. 2 Use a TORQUE WRENCH, to measure the maximum locking torque value of the bolts (2).
NOTE: Minimum of one and half threads of the bolts (2) must be seen to record the locking torque value.
3 Make sure that the maximum locking torque value of the nut (4) is not more than 0.339 m.daN (30.00 lbf.in). 4 If the maximum locking torque value is not in the limits, discard the nut (4) and install a new AIPC 78-11-80-20-070 NUT (4) with AIPC 78-11-80-20-060 RIVET (5) (Ref. AMM TASK 70-60-00-910-802).
(d) Do a check for the minimum breakaway torque for each nut (4):
1 Use a WRENCH - TORQUE to loosen the bolts (2).
NOTE: Minimum of one and half threads of the bolts (2) must be seen to record the breakaway torque value.
2 Make sure that the minimum breakaway torque value necessary to turn the nut (4) is more than 0.04 m.daN (3.54 lbf.in). 3 If the minimum breakaway torque value is not in the limits, discard the nut (4) and install a new AIPC 78-11-80-20-070 NUT (4) with AIPC 78-11-80-20-060 RIVET (5) (Ref. AMM TASK 70-60-00-910-802).
(2) Installation of the exhaust rear plug (1).
(a) Clean the exhaust rear plug (1) and exhaust front plug flanges with a LINT-FREE COTTON CLOTH (Material No.CPNCL02069) made moist with GENERAL CLEANING AGENT - MULTI PURPOSE (Material No.CPNCL02589) .
(b) Apply lubricant Loctite 8009 (Material No.CPNCL02640) or NEVERSEEZ NICKEL SPECIAL GRADE (Material No.CPNCL00378) on the threads and the mating surface of each bolt (2).
(c) Remove the exhaust rear plug (1) from the 98N7810H001-000 EXHAUST DOLLY.
(d) Put the exhaust rear plug in position:
CAUTION:
CAREFULLY ALIGN THE REAR PLUG WITH THE SUPPORT CENTER VENT TUBE AROUND THE VENT TUBE (ENGINE PART) BEFORE YOU SLIDE THE REAR PLUG AXIALLY. IF YOU DO NOT OBEY THIS INSTRUCTION, DAMAGE TO THE REAR PLUG AND VENT TUBE CAN OCCUR.
CAUTION:
BE CAREFUL NOT TO CAUSE DAMAGE TO THE CENTERING DEVICE DURING INSTALLATION OF THE EXHAUST REAR PLUG.
1 Put the exhaust rear plug (1) in position on the exhaust front plug flange carefully to align the centering device. 2 Push forward the rear plug against the front plug and hold this position until the first eight bolts are tightened.
NOTE: Two mechanics are necessary to install the exhaust rear plug. One person must hold the end of the exhaust rear plug (1) during the installation of the bolts (2) and washers (3).
3 Make sure that the exhaust rear plug (1) is correctly installed on the forward plug. If necessary, do the step 4.B.(2)(d)1 again. (e) Installation of washers (3) and bolts (2):
WARNING:
PUSH THE REAR PLUG FORWARD AND HOLD IT IN THIS POSITION UNTIL YOU TORQUE THE FIRST EIGHT BOLTS. IF YOU DO NOT OBEY THIS INSTRUCTION, THE REAR PLUG CAN FALL AND CAUSE INJURY TO PERSONS AND/OR DAMAGE TO THE EQUIPMENT.
CAUTION:
OBEY THE BOLT INSTALLATION SEQUENCE. IF YOU DO NOT, DAMAGE TO EQUIPMENT CAN OCCUR.
1 Install the washers (3) and bolts (2) at bolt position numbers 1, 18, 10, 27, 5, 22, 31 and 14. 2 TORQUE the bolts (2) at position numbers 1, 18, 10, 27, 5, 22, 31 and 14 to between 1.08 and 0.88 m.daN (95.58 and 77.88 lbf.in )
in accordance with this sequence. 3 Install the washers (3) and bolts (2) at the remaining positions in clockwise direction.
4 TORQUE the remaining bolts (2) to between 1.08 and 0.88 m.daN (95.58 and 77.88 lbf.in )
in a clockwise direction. 5 Do a second TORQUE application at bolt position numbers 1, 18, 10, 27, 5, 22, 31 and 14:
NOTE: Do this procedure one bolt by one bolt in accordance with this sequence.
a Loosen the bolt (2) to one half of a turn. b TORQUE the bolt (2) to between 1.08 and 0.88 m.daN (95.58 and 77.88 lbf.in )
. 6 Do a second TORQUE application at the remaining positions in clockwise direction:
NOTE: Do this procedure one bolt by one bolt in the clockwise direction.
a Loosen the bolt (2) to one half of a turn. b TORQUE the bolt (2) to between 1.08 and 0.88 m.daN (95.58 and 77.88 lbf.in )
. Subtask 78-11-41-440-052-A
A. Do the reactivation of the thrust reverser system after nacelle maintenance (Ref. AMM TASK 78-30-00-440-807).
Subtask 78-11-41-410-050-A B. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-803):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL 448AR
(3) Remove the access platform(s).
(4) Remove the WARNING NOTICE(S).
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-803):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL 448AR
(3) Remove the access platform(s).
(4) Remove the WARNING NOTICE(S).