W DOC AIRBUS | AMM A320F

Inspection of the APU upon Odor in the Cabin/Fumes in the Cabin (131-9(A)) - Level A

TASK 49-00-00-200-812-A
Inspection of the APU upon Odor in the Cabin/Fumes in the Cabin (131-9(A)) - Level A

WARNING: DO NOT TOUCH THE APU UNTIL IT IS SUFFICIENTLY COOL TO PREVENT BURNS WHEN YOU DO THE MAINTENANCE TASK(S).
1. Reason for the Job
An hydraulic leak from the landing gear or the stabilizers and/or external oil/fuel/de-icing contamination can be at the origin of the odor in cabin if ingested at the APU inlet.
2. Job Set-up Information
 A. Fixtures, Tools, Test and Support Equipment
REFERENCE
QTY
DESIGNATION
No specific
1
ACCESS PLATFORM 4M (13 FT)-ADJUSTABLE
No specific
1
LIGHT SOURCE - ULTRA-VIOLET
No specific
AR
SAFETY CLIP - CIRCUIT BREAKER
No specific
1
WARNING NOTICE(S)
 B. Work Zones and Access Panels
ZONE/ACCESS
ZONE DESCRIPTION
315AL, 316AR
 C. Referenced Information
REFERENCE
DESIGNATION
TASK 12-21-11-615-002-A
External Cleaning
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 24-42-00-862-001-A
De-energize the Ground Service Network Supplied from the External Power
TASK 28-11-00-210-801-A
General Visual Inspection of Fuel Tanks for Minor External Leaks
TASK 29-00-00-790-001-A
Check of the External Leaks of the Hydraulic Components
TASK 29-00-00-864-001-A
Put the Related Hydraulic System in the Depressurized Configuration before Maintenance Action
TASK 49-00-00-200-804-A
Inspection of the APU (131-9(A)) for De-Icing Contamination
TASK 49-00-00-200-811-A
Inspection of the APU upon Odor in the Cabin/Fumes in the Cabin/Oil Smoke at the APU Exhaust (131-9(A)) - Level B/C
TASK 49-16-00-100-005-A
Cleaning of the APU Air Intake (131-9(A))
F Oil Odor in Cabin (131-9(A)) - Level A
3. Job Set-up
Subtask 49-00-00-860-214-A ** ON A/C NOT FOR ALL
A. Aircraft Maintenance Configuration
   (1) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).
   (2) On the panel 25VU, make sure that the APU MASTER SW pushbutton switch is ON.
   (3) Put a WARNING NOTICE(S) in the cockpit to tell persons not to start the APU.
   (4) Make sure that the hydraulic systems are depressurized
(Ref. AMM TASK 29-00-00-864-001).
Subtask 49-00-00-865-208-A ** ON A/C NOT FOR ALL
B. Open, safety and tag this(these) circuit breaker(s):
PANELDESIGNATIONFINLOCATION
** ON A/C NOT FOR ALL
121VUAPU/APU/CTL2KDL42
121VUAPU/ECB/SPLY1KDL41
Subtask 49-00-00-010-108-A ** ON A/C NOT FOR ALL
C. Get Access
   (1) Put an ACCESS PLATFORM 4M (13 FT)-ADJUSTABLE in position below the APU access door 315AL and 316AR.
4. Procedure
Subtask 49-00-00-790-067-A ** ON A/C NOT FOR ALL
A. APU air intake surrounding rear inspection
F Oil Odor in Cabin (131-9(A)) - Level A ** ON A/C NOT FOR ALL
   (1) Use a LIGHT SOURCE - ULTRA-VIOLET to identify oil leaks.
   (2) Do a check for signs of external hydraulic, oil, fuel and/or de-icing fluid contamination and do an inspection of:
  • A/C fuselage from the nose landing gear to the APU inlet.
  • A/C vertical stabilizer down to the APU inlet.
  • A/C rear fairing around the APU air intake.
  • APU diverter plate.
  • APU air-intake flap.
  • APU air-intake housing internal part.
  • APU access doors.
  • APU cooling fan duct-exhaust.
     (a) If you find oil leaks on:
  • APU drain mast.
  • APU cooling fan duct-exhaust.
  • APU access doors.
       1 Do the inspection of the APU (Ref. AMM TASK 49-00-00-200-811).
     (b) If you find oil leaks on:
  • APU diverter plate.
  • APU air-intake flap.
       1 Clean the A/C external contamination areas (Ref. AMM TASK 12-21-11-615-002).
     (c) If you find oil leaks on APU air-intake housing internal parts:
       1 Clean the air-intake internal parts (Ref. AMM TASK 49-16-00-100-005).
     (d) If you find fuel leaks, do the General Visual Inspection of the Fuel Tanks for Minor External Leaks (Ref. AMM TASK 28-11-00-210-801)
and clean the A/C external contamination areas (Ref. AMM TASK 12-21-11-615-002).
     (e) If you find hydraulic leaks, do a check of the external leaks of the hydraulic components (Ref. AMM TASK 29-00-00-790-001)
and clean the A/C external contamination areas (Ref. AMM TASK 12-21-11-615-002).
NOTE: During visual inspection, you must repair the hydraulic leakage from the landing gear.
     (f) If you find de-icing fluid contamination, do an inspection of the APU (Ref. AMM TASK 49-00-00-200-804)
and clean the A/C external contamination areas (Ref. AMM TASK 12-21-11-615-002).
NOTE: If you operate the APU during fluid de-icing operations you could find contamination on the APU inlet and the APU compressor.
5. Close-up
Subtask 49-00-00-410-102-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) Remove the access platform(s).
Subtask 49-00-00-865-209-A ** ON A/C NOT FOR ALL
B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
PANELDESIGNATIONFINLOCATION
** ON A/C NOT FOR ALL
121VUAPU/APU/CTL2KDL42
121VUAPU/ECB/SPLY1KDL41
Subtask 49-00-00-860-215-A ** ON A/C NOT FOR ALL
C. Aircraft Maintenance Configuration
   (1) Put the related hydraulic system in the pressurized configuration (Ref. AMM TASK 29-00-00-864-001).
   (2) On the panel 25VU, make sure that the APU MASTER SW pushbutton switch is OFF.
   (3) De-energize the ground service network
(Ref. AMM TASK 24-42-00-862-001).
   (4) Remove the WARNING NOTICE(S).
[Rev.10 from 2021] 2026.04.01 01:26:16 UTC
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