DOC AIRBUS | AMM A320FReplacement of the Common Nozzle Assembly Inner Annulus Seals - VRS2305 [IAE]
TASK 78-11-11-300-013-A
Replacement of the Common Nozzle Assembly Inner Annulus Seals - VRS2305
1. Reason for the Job
This type of damage can be repaired by removal of the worn or damaged seals and installation of replacement seals. If a seal is not fully damaged, only the damaged part will have to be replaced.
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 78-11-11-941-064-A ** ON A/C NOT FOR ALL
Subtask 78-11-11-350-061-A ** ON A/C NOT FOR ALL
Subtask 78-11-11-410-077-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.01 03:27:06 UTC
Replacement of the Common Nozzle Assembly Inner Annulus Seals - VRS2305
1. Reason for the Job
This type of damage can be repaired by removal of the worn or damaged seals and installation of replacement seals. If a seal is not fully damaged, only the damaged part will have to be replaced.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | 1 | ACCESS PLATFORM 2M (6 FT) |
| No specific | 1 | KNIFE - PALLET |
| No specific | 1 | WARNING NOTICE(S) |
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.V01-438) | solvent |
| (Material No.V02-099) | lint-free cloth |
| (Material No.V05-074) | aluminium oxide abrasive paper |
| (Material No.V08-031) | silicone rubber compound |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| FOR [1000EM1] (ENGINE-1) | |
| 425AR, 437AL, 438AR, 451AL, 452AR | |
| FOR [1000EM2] (ENGINE-2) | |
| 447AL, 448AR, 461AL, 462AR | |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 71-13-00-010-010-A | Opening of the Fan Cowls 437AL(447AL),438AR(448AR) |
| TASK 71-13-00-410-010-A | Closing of the Fan Cowls 437AL(447AL),438AR(448AR) |
| TASK 78-30-00-040-012-A | Deactivation of the Thrust Reverser Hydraulic Control Unit (HCU) for Ground Maintenance |
| TASK 78-30-00-440-012-A | Re-activation of the Thrust Reverser Hydraulic Control Unit (HCU) after Ground Maintenance |
| TASK 78-32-00-010-010-A | Opening of the Thrust Reverser Halves |
| TASK 78-32-00-410-010-A | Closing of the Thrust Reverser Halves |
Common Nozzle Assembly Inner Annulus SealsSubtask 78-11-11-941-064-A ** ON A/C NOT FOR ALL
A. Safety Precautions
(1) On the center pedestal, on the ENG panel 115VU:
(a) Put a WARNING NOTICE(S) in position to tell persons not to start the engine.
(2) Make sure that the engine 1(2) shutdown occurred not less than 5 minutes before you do this procedure.
(3) On the overhead maintenance panel 50VU:
(a) Make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off.
(b) Put a WARNING NOTICE(S) in position to tell persons not to energize the FADEC 1(2).
Subtask 78-11-11-010-081-A ** ON A/C NOT FOR ALL (1) On the center pedestal, on the ENG panel 115VU:
(a) Put a WARNING NOTICE(S) in position to tell persons not to start the engine.
(2) Make sure that the engine 1(2) shutdown occurred not less than 5 minutes before you do this procedure.
(3) On the overhead maintenance panel 50VU:
(a) Make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off.
(b) Put a WARNING NOTICE(S) in position to tell persons not to energize the FADEC 1(2).
B. Get Access
(1) Open the fan cowls (Ref. AMM TASK 71-13-00-010-010):
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR.
(2) Put the ACCESS PLATFORM 2M (6 FT) in position.
Subtask 78-11-11-040-066-A ** ON A/C NOT FOR ALL (1) Open the fan cowls (Ref. AMM TASK 71-13-00-010-010):
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR.
(2) Put the ACCESS PLATFORM 2M (6 FT) in position.
C. Deactivation of the Thrust Reverser
Subtask 78-11-11-010-082-A ** ON A/C NOT FOR ALL WARNING:
MAKE SURE THAT THE THRUST REVERSER HYDRAULIC CONTROL UNIT (HCU) IS DEACTIVATED BEFORE YOU DO WORK ON OR AROUND THE THRUST REVERSER. IF THE HCU IS NOT DEACTIVATED, THERE IS A RISK OF UNWANTED THRUST REVERSER OPERATION WHICH CAN CAUSE INJURY TO PERSONS AND/OR DAMAGE TO EQUIPMENT.
(1) Deactivate the thrust reverser hydraulic control unit (HCU) (Ref. AMM TASK 78-30-00-040-012). D. Opening of the Thrust Reverser Halves
(1) Open the thrust reverser halves (Ref. AMM TASK 78-32-00-010-010):
(a) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(b) FOR [1000EM2] (ENGINE-2)
461AL 462AR.
4. Procedure(1) Open the thrust reverser halves (Ref. AMM TASK 78-32-00-010-010):
(a) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(b) FOR [1000EM2] (ENGINE-2)
461AL 462AR.
Subtask 78-11-11-350-061-A ** ON A/C NOT FOR ALL
A. Removal of the Worn or Damaged Seals
(1) The seals are bonded with adhesive at each end. The splices and adhesive bonding must be removed to release the seal ends. Use a KNIFE - PALLET to remove the splices at the splice points and to separate the damaged seal from adjacent seals. Do not damage the adjacent seals.
Subtask 78-11-11-350-062-A ** ON A/C NOT FOR ALL (1) The seals are bonded with adhesive at each end. The splices and adhesive bonding must be removed to release the seal ends. Use a KNIFE - PALLET to remove the splices at the splice points and to separate the damaged seal from adjacent seals. Do not damage the adjacent seals.
NOTE: If only a part of the seal is damaged, cut out and replace the damaged part only.
B. Preparation of the Parts for Installation
(a) Use the applicable repair parts to make the new seals and splices. Cut the seal to the necessary length so each seal will agree with the carrier contour.
(2) Make the mating surfaces of the rubber parts rough.
(a) Use aluminium oxide abrasive paper (Material No.V05-074) . Make the mating surfaces of the rubber parts and the inner surface of the seal ends rough.
(3) Clean the surface.
(a) Use a KNIFE - PALLET or aluminium oxide abrasive paper (Material No.V05-074) . Remove the remaining adhesive from the repair area. Use dry air blast or vacuum to remove unwanted material. Make the lint-free cloth (Material No.V02-099) moist with solvent (Material No.V01-438) . Use the moist cloth to clean the repair area. Rub the surfaces clean before the solvent dries.
Subtask 78-11-11-350-063-A ** ON A/C NOT FOR ALL 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.
WARNING:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
CAUTION:
USE LINT-FREE GLOVES (MATERIAL NO. V02-097) WHEN YOU TOUCH THE CLEAN PARTS. THIS WILL HELP PREVENT CONTAMINATION.
(1) Make the new seals and splices. (a) Use the applicable repair parts to make the new seals and splices. Cut the seal to the necessary length so each seal will agree with the carrier contour.
(2) Make the mating surfaces of the rubber parts rough.
(a) Use aluminium oxide abrasive paper (Material No.V05-074) . Make the mating surfaces of the rubber parts and the inner surface of the seal ends rough.
(3) Clean the surface.
(a) Use a KNIFE - PALLET or aluminium oxide abrasive paper (Material No.V05-074) . Remove the remaining adhesive from the repair area. Use dry air blast or vacuum to remove unwanted material. Make the lint-free cloth (Material No.V02-099) moist with solvent (Material No.V01-438) . Use the moist cloth to clean the repair area. Rub the surfaces clean before the solvent dries.
C. Installation of the New Parts
(a) Apply a layer of silicone rubber compound (Material No.V08-031) to the mating surfaces of the splices and seal ends.
(2) Assemble the seals.
(a) Put the seals in the retainers. Insert the seal ends as required to assemble the seals. Make sure the vent holes in the seals are positioned aft. If necessary, use silicone rubber compound (Material No.V08-031) to fill the spaces at the splice joints.
(a) Make a lint-free cloth (Material No.V02-099) moist with solvent (Material No.V01-438) . Use the moist cloth to remove unwanted silicone rubber compound (Material No.V08-031) from the surface of the seal.
(a) Let the repair area dry at room temperature for 24 hours before you touch the parts.
Subtask 78-11-11-210-061-A ** ON A/C NOT FOR ALL 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.
WARNING:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
(1) Apply the silicone rubber compound to the mating surfaces. (a) Apply a layer of silicone rubber compound (Material No.V08-031) to the mating surfaces of the splices and seal ends.
(2) Assemble the seals.
(a) Put the seals in the retainers. Insert the seal ends as required to assemble the seals. Make sure the vent holes in the seals are positioned aft. If necessary, use silicone rubber compound (Material No.V08-031) to fill the spaces at the splice joints.
NOTE: Do not apply too much force to the seal ends and splices during installation. Too much force causes the adhesive to come out.
(3) Clean the repair area. (a) Make a lint-free cloth (Material No.V02-099) moist with solvent (Material No.V01-438) . Use the moist cloth to remove unwanted silicone rubber compound (Material No.V08-031) from the surface of the seal.
NOTE: The compound remaining on the seal surface after bonding is no more than 0.02 in. (0.50 mm) thick.
(4) Cure the adhesive. (a) Let the repair area dry at room temperature for 24 hours before you touch the parts.
NOTE: It is not necessary to let the silicone rubber compound fully cure during the repair. The uncured silicone rubber compound is structurally and functionally acceptable.
D. Examination of the Completed Repair
(1) Visually examine the repair.
(a) Examine the completed repair to make sure that the requirements of this repair are done.
5. Close-up(1) Visually examine the repair.
(a) Examine the completed repair to make sure that the requirements of this repair are done.
Subtask 78-11-11-410-077-A ** ON A/C NOT FOR ALL
A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the thrust reverser halves (Ref. AMM TASK 78-32-00-410-010):
(a) FOR [1000EM1] (ENGINE-1)
451AL 425AR
(b) FOR [1000EM2] (ENGINE-2)
461AL 462AR.
(3) Remove the access platform(s).
Subtask 78-11-11-440-063-A ** ON A/C NOT FOR ALL (1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the thrust reverser halves (Ref. AMM TASK 78-32-00-410-010):
(a) FOR [1000EM1] (ENGINE-1)
451AL 425AR
(b) FOR [1000EM2] (ENGINE-2)
461AL 462AR.
(3) Remove the access platform(s).
B. Re-activation of the Thrust Reverser HCU
(1) Do the re-activation of the thrust reverser HCU (Ref. AMM TASK 78-30-00-440-012).
Subtask 78-11-11-410-078-A ** ON A/C NOT FOR ALL (1) Do the re-activation of the thrust reverser HCU (Ref. AMM TASK 78-30-00-440-012).