DOC AIRBUS | AMM A320FInstallation of the Left Thrust Reverser Bullnose Seals [PW11]
TASK 78-32-42-400-803-A
Installation of the Left Thrust Reverser Bullnose Seals
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 78-32-42-941-064-A ** ON A/C NOT FOR ALL
Subtask 78-32-42-860-064-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.01 03:33:22 UTC
Installation of the Left Thrust Reverser Bullnose Seals
WARNING:
BE CAREFUL WHEN YOU DO WORK ON THE ENGINE AFTER SHUTDOWN. THE ENGINE CAN STAY HOT FOR A LONG TIME. IF YOU DO NOT OBEY THIS INSTRUCTION, INJURY CAN OCCUR.
WARNING:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
WARNING:
WEAR APPLICABLE PERSONAL PROTECTIVE EQUIPMENT (PPE) WHEN YOU DO THIS TASK. BEFORE YOU USE PPE, READ, UNDERSTAND AND OBEY ALL INSTRUCTIONS FOR ITS USE. THESE INSTRUCTIONS INCLUDE INSTRUCTIONS FROM THE MANUFACTURER, YOUR EMPLOYER AND GOVERNMENT REGULATIONS. YOU CAN GET INJURED IF YOU DO NOT USE PPE. GET INSTRUCTIONS FROM YOUR EMPLOYER ON WHICH PPE IS NECESSARY.
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 2M (6 FT) - ADJUSTABLE |
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.PU1-0001) | lint-free cotton cloth |
| (Material No.PU1-0003) | abrasive paper, 220-Grit |
| (Material No.PU2-0001) | alcohol, isopropyl |
| (Material No.PU3-0002) | sealant |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1) | |
| 437AL, 438AR | |
| FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2) | |
| 447AL, 448AR | |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 71-00-00-860-833-A | Procedure to Prevent Engine Motoring |
| TASK 71-13-00-010-802-A | Opening of the Fan Cowl Doors |
| TASK 71-13-00-410-802-A | Closing of the Fan Cowl Doors |
| TASK 78-30-00-040-805-A | Deactivation of the Thrust Reverser System for Ground Maintenance |
| TASK 78-30-00-440-805-A | Reactivation of the Thrust Reverser System after Ground Maintenance |
| TASK 78-32-00-860-802-A | Manual Extension of the Thrust-Reverser Translating Sleeves |
| TASK 78-32-00-860-803-A | Manual Retraction of the Thrust-Reverser Translating Sleeves |
Left Thrust Reverser Bullnose SealsSubtask 78-32-42-941-064-A ** ON A/C NOT FOR ALL
A. Safety Precautions
(1) Make sure that you did the procedure to prevent engine motoring
(Ref. AMM TASK 71-00-00-860-833).
Subtask 78-32-42-010-081-A ** ON A/C NOT FOR ALL (1) Make sure that you did the procedure to prevent engine motoring
(Ref. AMM TASK 71-00-00-860-833).
B. Get Access
(1) Make sure that the fan cowl doors are open (Ref. AMM TASK 71-13-00-010-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL, 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL, 448AR
Subtask 78-32-42-040-069-A ** ON A/C NOT FOR ALL (1) Make sure that the fan cowl doors are open (Ref. AMM TASK 71-13-00-010-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL, 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL, 448AR
C. Deactivation of the Thrust Reverser System for Ground Maintenance
Subtask 78-32-42-860-063-A ** ON A/C NOT FOR ALL 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) Make sure that you did the deactivation of the thrust reverser system for ground maintenance (Ref. AMM TASK 78-30-00-040-805). D. Aircraft Maintenance Configuration
(1) Make sure that the left thrust reverser translating sleeve is extended (Ref. AMM TASK 78-32-00-860-802).
(2) Make sure that the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE is in position.
Subtask 78-32-42-010-089-A ** ON A/C NOT FOR ALL (1) Make sure that the left thrust reverser translating sleeve is extended (Ref. AMM TASK 78-32-00-860-802).
(2) Make sure that the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE is in position.
E. Removal of the Protection Covers
4. ProcedureCAUTION:
REMOVE THE PROTECTION COVERS FROM THE OPENINGS AS NECESSARY TO PREVENT ENGINE DAMAGE.
(1) Make sure that you remove all the necessary COVER - PROTECTION to prevent damage to the engine. CAUTION:
WIPE CLEAN ALL PARTS AND TOOLS AS NECESSARY TO REMOVE UNWANTED DEBRIS AND PREVENT DAMAGE TO THE ENGINE.
Subtask 78-32-42-420-061-A ** ON A/C NOT FOR ALL A. Installation of the Lower Bullnose Seal (3).
(1) Lightly rub the mating surface of seal retainer under the lower bullnose seal (3) withPU1-0003 abrasive paper, 220-Grit
(2) Clean the mating surfaces of the seal retainer, the lower seal cap and the lower bullnose seal (3). UsePU2-0001 alcohol, isopropyl
(3) Remove thePU2-0001 alcohol, isopropyl
(4) Apply a layer of sealant (Material No.PU3-0002) to the mating surface of the lower bullnose seal (3) and the seal retainer to fill holes and gaps. Refer to the manufacturer's instructions.
(5) Install the lower bullnose seal (3) in the lower seal cap and the seal retainer.
Subtask 78-32-42-420-065-A ** ON A/C NOT FOR ALL (1) Lightly rub the mating surface of seal retainer under the lower bullnose seal (3) with
(2) Clean the mating surfaces of the seal retainer, the lower seal cap and the lower bullnose seal (3). Use
(3) Remove the
(4) Apply a layer of sealant (Material No.PU3-0002) to the mating surface of the lower bullnose seal (3) and the seal retainer to fill holes and gaps. Refer to the manufacturer's instructions.
(5) Install the lower bullnose seal (3) in the lower seal cap and the seal retainer.
NOTE: If necessary, trim the female side of the bullnose seal (3) up to 0.1 in. (2.54 mm) to achieve a gap of 0.00 in. (0.00 mm) to 0.06 in. (1.52 mm) between the adjacent seals.
(6) Let the sealant (Material No.PU3-0002) cure for at least six hours before you put the aircraft into operation. Refer to the manufacturer's instructions. NOTE: After six hours, the sealant (Material No.PU3-0002) will be in the tack-free condition.
B. Installation of the Standard Bullnose Seals (2)
(1) Lightly rub the mating surfaces of seal retainers under the three standard bullnose seals (2) withPU1-0003 abrasive paper, 220-Grit
(2) Clean the mating surfaces of the applicable seal retainers and the three standard bullnose seals (2). UsePU2-0001 alcohol, isopropyl
(3) Remove thePU2-0001 alcohol, isopropyl
(4) Apply a layer of sealant (Material No.PU3-0002) to the mating surfaces of the three standard bullnose seals (2) and the seal retainers to fill holes and gaps. Refer to the manufacturer's instructions.
(5) Install the three standard bullnose seals (2) in the adjacent seals and in the applicable seal retainers.
Subtask 78-32-42-420-062-A ** ON A/C NOT FOR ALL (1) Lightly rub the mating surfaces of seal retainers under the three standard bullnose seals (2) with
(2) Clean the mating surfaces of the applicable seal retainers and the three standard bullnose seals (2). Use
(3) Remove the
(4) Apply a layer of sealant (Material No.PU3-0002) to the mating surfaces of the three standard bullnose seals (2) and the seal retainers to fill holes and gaps. Refer to the manufacturer's instructions.
(5) Install the three standard bullnose seals (2) in the adjacent seals and in the applicable seal retainers.
NOTE: If necessary, trim the female side of the bullnose seals (2) up to 0.1 in. (2.54 mm) to achieve a gap of 0.00 in. (0.00 mm) to 0.06 in. (1.52 mm) between the adjacent seals.
(6) Let the sealant (Material No.PU3-0002) cure for at least six hours before you put the aircraft into operation. Refer to the manufacturer's instructions. NOTE: After six hours, the sealant (Material No.PU3-0002) will be in the tack-free condition.
C. Installation of the Upper Bullnose Seal (1)
(1) Lightly rub the mating surfaces of seal retainers under the upper bullnose seal (1) withPU1-0003 abrasive paper, 220-Grit
(2) Clean the mating surfaces of the applicable seal retainer, the upper seal cap and the upper bullnose seal (1). UsePU2-0001 alcohol, isopropyl
(3) Remove thePU2-0001 alcohol, isopropyl
(4) Apply a layer of sealant (Material No.PU3-0002) to the mating surface of the upper bullnose seal (1) and the seal retainers to fill holes and gaps. Refer to the manufacturer's instructions.
(5) Install the upper bullnose seal (1) in the upper seal cap and the applicable seal retainer.
5. Close-up(1) Lightly rub the mating surfaces of seal retainers under the upper bullnose seal (1) with
(2) Clean the mating surfaces of the applicable seal retainer, the upper seal cap and the upper bullnose seal (1). Use
(3) Remove the
(4) Apply a layer of sealant (Material No.PU3-0002) to the mating surface of the upper bullnose seal (1) and the seal retainers to fill holes and gaps. Refer to the manufacturer's instructions.
(5) Install the upper bullnose seal (1) in the upper seal cap and the applicable seal retainer.
NOTE: If necessary, trim the female side of the bullnose seal (1) up to 0.1 in. (2.54 mm) to achieve a gap of 0.00 in. (0.00 mm) to 0.06 in. (1.52 mm) between the adjacent seals.
(6) Let the sealant (Material No.PU3-0002) cure for at least six hours before you put the aircraft into operation. Refer to the manufacturer's instructions. NOTE: After six hours, the sealant (Material No.PU3-0002) will be in the tack-free condition.
Subtask 78-32-42-860-064-A ** ON A/C NOT FOR ALL
A. Put the aircraft back to its initial configuration.
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Manually retract the left thrust reverser translating sleeve (Ref. AMM TASK 78-32-00-860-803).
Subtask 78-32-42-440-062-A ** ON A/C NOT FOR ALL (1) Make sure that the work area is clean and clear of tools and other items.
(2) Manually retract the left thrust reverser translating sleeve (Ref. AMM TASK 78-32-00-860-803).
B. Do the reactivation of the thrust reverser system after ground maintenance (Ref. AMM TASK 78-30-00-440-805).
Subtask 78-32-42-410-073-A ** ON A/C NOT FOR ALL C. Close Access
(1) Remove the access platform(s).
(2) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL 448AR
(3) Remove the access platform(s).
(4) Remove the WARNING NOTICE(S).
(1) Remove the access platform(s).
(2) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL 448AR
(3) Remove the access platform(s).
(4) Remove the WARNING NOTICE(S).