DOC AIRBUS | AMM A320FRepair of the Engine Identification Module (APS 3200)
TASK 49-73-31-300-801-A
Repair of the Engine Identification Module (APS 3200)
This procedure is applicable to the engine identification module P/N 4508693.
A. Fixtures, Tools, Test and Support Equipment
B. Consumable Materials
C. Work Zones and Access Panels
D. Referenced Information
3. Job Set-up
Subtask 49-73-31-861-050-A ** ON A/C NOT FOR ALL Subtask 49-73-31-860-057-A ** ON A/C NOT FOR ALL
Subtask 49-73-31-020-053-A ** ON A/C NOT FOR ALL
Subtask 49-73-31-410-054-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.01 01:32:19 UTC
Repair of the Engine Identification Module (APS 3200)
WARNING:
DO NOT TOUCH THE APU UNTIL IT IS SUFFICIENTLY COOL TO PREVENT BURNS WHEN YOU DO THE MAINTENANCE TASK(S).
WARNING:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
1. Reason for the JobThis procedure is applicable to the engine identification module P/N 4508693.
NOTE: Although a repair method is given in this procedure, Airbus recommends that you install a new one-piece P/N 4500887AN.
2. Job Set-up InformationA. Fixtures, Tools, Test and Support Equipment
B. Consumable Materials
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.04TMC9) | Varnish-- Protective Component |
| (Material No.05BAA1) | Threadlocking Adhesive-- Low strength - |
| (Material No.06CGD1) | Silicone Adhesive Sealant-Non corrosive High Strength One part paste - |
| (Material No.08BBD1) | Non Aqueous Cleaner-- Isopropyl Alcohol - |
| (Material No.08BBH1) | Non Aqueous Cleaner-- Acetone - |
| (Material No.14SBA1) | Textile-Lint free Cotton - |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 315 | TAIL CONE APU AND ACCESSORY COMPARTMENT |
| 316 | TAIL CONE APU AND ACCESSORY COMPARTMENT |
| 315AL, 316AR |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 24-41-00-861-002-A | Energize the Aircraft Electrical Circuits from the External Power |
| TASK 24-41-00-861-002-A-01 | Energize the Aircraft Electrical Circuits from the APU |
| TASK 24-41-00-861-002-A-02 | Energize the Aircraft Electrical Circuits from Engine 1(2) |
| TASK 24-41-00-862-002-A | De-energize the Aircraft Electrical Circuits Supplied from the External Power |
| TASK 24-41-00-862-002-A-01 | De-energize the Aircraft Electrical Circuits Supplied from the APU |
| TASK 24-41-00-862-002-A-02 | De-energize the Aircraft Electrical Circuits Supplied from the Engine 1(2) |
| TASK 29-00-00-864-001-A | Put the Related Hydraulic System in the Depressurized Configuration before Maintenance Action |
| TASK 49-73-31-000-001-A | Removal of the Engine Identification Module (APS 3200) |
| TASK 49-73-31-400-001-A | Installation of the Engine Identification Module (APS 3200) |
| TASK 52-41-00-010-001-A | Open the APU Doors for Access |
| TASK 52-41-00-410-001-A | Close the APU Doors after Access |
Engine Identification Module (APS 3200)Subtask 49-73-31-861-050-A ** ON A/C NOT FOR ALL Subtask 49-73-31-860-057-A ** ON A/C NOT FOR ALL
B. Aircraft Maintenance Configuration
(1) On panel 25VU, make sure that the APU MASTER SW pushbutton switch is off.
(2) Put a WARNING NOTICE(S) in position in the cockpit to tell persons not to start the APU.
Subtask 49-73-31-864-050-A ** ON A/C NOT FOR ALL (1) On panel 25VU, make sure that the APU MASTER SW pushbutton switch is off.
(2) Put a WARNING NOTICE(S) in position in the cockpit to tell persons not to start the APU.
C. Depressurize the aircraft hydraulic systems
(1) Make sure that the hydraulic systems are depressurized
(Ref. AMM TASK 29-00-00-864-001).
Subtask 49-73-31-865-057-A ** ON A/C NOT FOR ALL (1) Make sure that the hydraulic systems are depressurized
(Ref. AMM TASK 29-00-00-864-001).
D. Open, safety and tag this(these) circuit breaker(s):
Subtask 49-73-31-010-053-A ** ON A/C NOT FOR ALL | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| 121VU | APU/APU/CTL | 2KD | L42 |
| 121VU | APU/ECB/SPLY | 1KD | L41 |
E. Get Access
(1) Put the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE in position below APU access doors 315AL and 316AR.
(2) Open access doors 315AL and 316AR (Ref. AMM TASK 52-41-00-010-001).
(3) Set light control switch 11LJ to the ON position.
4. Procedure(1) Put the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE in position below APU access doors 315AL and 316AR.
(2) Open access doors 315AL and 316AR (Ref. AMM TASK 52-41-00-010-001).
(3) Set light control switch 11LJ to the ON position.
Subtask 49-73-31-020-053-A ** ON A/C NOT FOR ALL
A. Removal of the Engine Identification Module
(1) Remove the engine identification module (Ref. AMM TASK 49-73-31-000-001).
Subtask 49-73-31-350-050-A ** ON A/C NOT FOR ALL (1) Remove the engine identification module (Ref. AMM TASK 49-73-31-000-001).
B. Preparation of the Engine Identification Module
(1) Use a KNIFE - SHARP to remove the remaining adhesive from the backshell (2) and the cap (4).
(2) Use Non Aqueous Cleaner-- Acetone - (Material No.08BBH1) to remove the remaining adhesive from the backshell (2) and the cap (4).
(a) Do not let the solvents touch:
(a) Make sure that the bonding surfaces have no adhesive on them before you apply new adhesive.
(4) Rub each bonding surface on the backshell (2) and on the cap (4) with ABRASIVE PAPER - 50 TO 80 GRIT.
(5) Clean and degrease each bonding surface fully with a Textile-Lint free Cotton - (Material No.14SBA1) made moist with Non Aqueous Cleaner-- Isopropyl Alcohol - (Material No.08BBD1) .
(6) Mix the adhesive slowly to make sure that there is no air in it.
(8) If the varnish is not in the correct condition, apply new Varnish-- Protective Component (Material No.04TMC9) to the areas of the printed wiring assembly.
Subtask 49-73-31-350-051-A ** ON A/C NOT FOR ALL (1) Use a KNIFE - SHARP to remove the remaining adhesive from the backshell (2) and the cap (4).
(2) Use Non Aqueous Cleaner-- Acetone - (Material No.08BBH1) to remove the remaining adhesive from the backshell (2) and the cap (4).
(a) Do not let the solvents touch:
- The epoxy that protects the part marking on the cap (4) face, or
- The insulation pad (3) attached to the cap (4).
(a) Make sure that the bonding surfaces have no adhesive on them before you apply new adhesive.
(4) Rub each bonding surface on the backshell (2) and on the cap (4) with ABRASIVE PAPER - 50 TO 80 GRIT.
(5) Clean and degrease each bonding surface fully with a Textile-Lint free Cotton - (Material No.14SBA1) made moist with Non Aqueous Cleaner-- Isopropyl Alcohol - (Material No.08BBD1) .
(6) Mix the adhesive slowly to make sure that there is no air in it.
NOTE: The working life of 100 g (3.5274 oz) of adhesive is between 75 and 90 minutes.
(7) Do a check of the varnish applied on the engine identification module printed-wiring assembly. (8) If the varnish is not in the correct condition, apply new Varnish-- Protective Component (Material No.04TMC9) to the areas of the printed wiring assembly.
C. Repair of the Backshell Assembly
(1) Mix part A and part B of the adhesive Silicone Adhesive Sealant-Non corrosive High Strength One part paste - (Material No.06CGD1) with a ratio of 1 to 1 by weight or by volume.
(2) Apply mixed adhesive to the cap (4) bonding surface and apply it on the backshell (2).
(a) Turn the cap (4) a small distance for better bonding.
(b) Make sure that the bond line is 0.002 in. (0.0508 mm) to 0.007 in. (0.1778 mm) thick, and that the cap (4) does not come out of the backshell (2).
(3) Record the date and the time when you apply the adhesive on a tag, and attach the tag to the backshell (2) during the curing time.
(4) Remove all unwanted adhesive from the outer surface with a SPATULA - NON METALLIC or a KNIFE - SHARP.
(5) Select one of these steps to cure the adhesive. Step (a) is the recommended method:
(a) Cure the adhesive one night at ambient temperature, then put the backshell (2) in an oven at 150 deg.F (65.56 deg.C) for three or four hours to complete the curing.
(b) Put the backshell (2) in an oven and cure the adhesive at 200 deg.F (93.33 deg.C) for two or three hours.
(c) Cure the adhesive at ambient temperature for three or five days.
(6) When the part is cool, make sure that the cap (4) is tightly attached to the backshell (2).
(7) Remove the tag from the backshell assembly.
(8) Install the insulation pad (3) on the cap (4).
(9) Apply retaining compound Threadlocking Adhesive-- Low strength - (Material No.05BAA1) to the mating threads of the backshell assembly and the connector (1).
(10) Install the backshell assembly.
(11) TORQUE the coupling nut of the backshell assembly to between 45 and 35 lbf.in (0.51 and 0.40 m.daN )
.
Subtask 49-73-31-420-052-A ** ON A/C NOT FOR ALL (1) Mix part A and part B of the adhesive Silicone Adhesive Sealant-Non corrosive High Strength One part paste - (Material No.06CGD1) with a ratio of 1 to 1 by weight or by volume.
(2) Apply mixed adhesive to the cap (4) bonding surface and apply it on the backshell (2).
(a) Turn the cap (4) a small distance for better bonding.
(b) Make sure that the bond line is 0.002 in. (0.0508 mm) to 0.007 in. (0.1778 mm) thick, and that the cap (4) does not come out of the backshell (2).
(3) Record the date and the time when you apply the adhesive on a tag, and attach the tag to the backshell (2) during the curing time.
(4) Remove all unwanted adhesive from the outer surface with a SPATULA - NON METALLIC or a KNIFE - SHARP.
(5) Select one of these steps to cure the adhesive. Step (a) is the recommended method:
(a) Cure the adhesive one night at ambient temperature, then put the backshell (2) in an oven at 150 deg.F (65.56 deg.C) for three or four hours to complete the curing.
(b) Put the backshell (2) in an oven and cure the adhesive at 200 deg.F (93.33 deg.C) for two or three hours.
(c) Cure the adhesive at ambient temperature for three or five days.
(6) When the part is cool, make sure that the cap (4) is tightly attached to the backshell (2).
(7) Remove the tag from the backshell assembly.
(8) Install the insulation pad (3) on the cap (4).
(9) Apply retaining compound Threadlocking Adhesive-- Low strength - (Material No.05BAA1) to the mating threads of the backshell assembly and the connector (1).
(10) Install the backshell assembly.
(11) TORQUE the coupling nut of the backshell assembly to between 45 and 35 lbf.in (0.51 and 0.40 m.daN )
. D. Installation of the Engine Identification Module
(1) Install the engine identification module (Ref. AMM TASK 49-73-31-400-001).
5. Close-up(1) Install the engine identification module (Ref. AMM TASK 49-73-31-400-001).
Subtask 49-73-31-410-054-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) Set light control switch 11LJ to the OFF position.
(3) Close APU access doors 315AL and 316AR (Ref. AMM TASK 52-41-00-410-001).
(4) Remove the access platform(s).
Subtask 49-73-31-865-058-A ** ON A/C NOT FOR ALL (1) Make sure that the work area is clean and clear of tools and other items.
(2) Set light control switch 11LJ to the OFF position.
(3) Close APU access doors 315AL and 316AR (Ref. AMM TASK 52-41-00-410-001).
(4) Remove the access platform(s).
B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
Subtask 49-73-31-860-058-A ** ON A/C NOT FOR ALL | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| 121VU | APU/APU/CTL | 2KD | L42 |
| 121VU | APU/ECB/SPLY | 1KD | L41 |
C. Aircraft Maintenance Configuration
(1) Remove the WARNING NOTICE(S).
(2) Put the aircraft back to its initial configuration.
Subtask 49-73-31-863-050-A ** ON A/C NOT FOR ALL Subtask 49-73-31-862-050-A ** ON A/C NOT FOR ALL (1) Remove the WARNING NOTICE(S).
(2) Put the aircraft back to its initial configuration.