W DOC AIRBUS | AMM A320F

Operational Test of the Air Intake Flap and Diverter (131-9(A))

TASK 49-16-00-710-003-A
Operational Test of the Air Intake Flap and Diverter (131-9(A))

WARNING: DO NOT TOUCH THE APU UNTIL IT IS SUFFICIENTLY COOL TO PREVENT BURNS WHEN YOU DO THE MAINTENANCE TASK(S).
ZONE: 210
ZONE: 310
ZONE: 315
1. Reason for the Job
Self explanatory
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
AR
SAFETY CLIP - CIRCUIT BREAKER
 B. Work Zones and Access Panels
ZONE/ACCESS
ZONE DESCRIPTION
210
CKPT,FWD COMPT BHD TO FLT COMPT BULKHEAD
310
FUSLG TAIL SECTION AFT OF AFT PRESS BHD
315
TAIL CONE APU AND ACCESSORY COMPARTMENT
 C. Referenced Information
REFERENCE
DESIGNATION
TASK 24-42-00-861-001-A
Energize the Ground Service Network from the External Power
TASK 24-42-00-862-001-A
De-energize the Ground Service Network Supplied from the External Power
TASK 29-00-00-864-001-A
Put the Related Hydraulic System in the Depressurized Configuration before Maintenance Action
TASK 31-60-00-860-001-A
EIS Start Procedure
TASK 49-16-43-400-003-A
Installation of the Air Intake Flap (131-9(A))
F Air Intake System Measurements
3. Job Set-up
Subtask 49-16-00-860-060-A ** ON A/C NOT FOR ALL
A. Aircraft Maintenance Configuration
   (1) Energize the ground service network
(Ref. AMM TASK 24-42-00-861-001).
   (2) Make sure that the hydraulic systems are depressurized
(Ref. AMM TASK 29-00-00-864-001).
   (3) Do the EIS start procedure (upper ECAM DU and lower ECAM DU only)
(Ref. AMM TASK 31-60-00-860-001).
Subtask 49-16-00-865-075-A ** ON A/C NOT FOR ALL
B. Open, safety and tag this(these) circuit breaker(s):
PANELDESIGNATIONFINLOCATION
** ON A/C NOT FOR ALL
49VUAPU/FUEL/BLOW OFF/PUMP2QCB14
** ON A/C NOT FOR ALL
121VUAPU/FUEL/BLOW OFF/CTL1QCK39
** ON A/C NOT FOR ALL
121VUAPU/FUEL/LP VALVE/CTL1QFM40
121VUAPU/FUEL/LP VALVE/SPLY2QFM39
121VUAPU/FUEL/PUMP/CTL3QCM38
** ON A/C NOT FOR ALL
121VUAPU/FUEL/BLOW OFF/CTL1QCP38
Subtask 49-16-00-865-076-A ** ON A/C NOT FOR ALL
C. Make sure that this(these) circuit breaker(s) is(are) closed:
PANELDESIGNATIONFINLOCATION
** ON A/C NOT FOR ALL
121VUAPU/APU/CTL2KDL42
121VUAPU/ECB/SPLY1KDL41
Subtask 49-16-00-010-063-A ** ON A/C NOT FOR ALL
D. Get Access
   (1) Put the ACCESS PLATFORM 4M (13 FT)-ADJUSTABLE below the APU access doors 315AL and 316AR.
   (2) Make sure that the APU intake blanking plug is removed.
   (3) Make sure that the work area is clean and clear of tools and other items.
NOTE: Open the circuit breakers 1KD and 2KD if adjustments are necessary.
4. Procedure
Subtask 49-16-00-710-052-B ** ON A/C NOT FOR ALL
A. Operational Test of the Air Intake Flap and Diverter
NOTE: For adjustment of the air-intake flap (Ref. AMM TASK 49-16-43-400-003).
ACTION
RESULT
1.On the overhead panel 25VU:
  • push the APU MASTER SW pushbutton switch to the ON position.
On the overhead panel 25VU:
  • the ON legend in the APU MASTER SW pushbutton switch comes on.
  • the air intake flap opens.
2.On the ECAM panel:
  • push the pushbutton APU.
On the ECAM systems page:
  • the FLAP OPEN indication comes on.
3.Examine the contour of the air intake flap and the air intake structure.
  • the contour should be in line. The maximum deviation B of the flap is 1.0 mm (0.0394 in.).
NOTE: If the air intake flap is not in line with the structure, remove the rubber cover on the lower part of the flap actuator rod for access. Disconnect the cotter pin, nut and the bolt that attaches the lower part of the actuator rod to the air intake flap. Adjust the actuator rod length to get the correct position.Then connect the actuator rod to the air intake flap.
4.On the overhead panel 25VU:
  • release the APU MASTER SW pushbutton to the off position.
On the overhead panel 25VU:
  • the ON legend in the APU MASTER SW pushbutton switch goes off.
  • the air intake flap closes.
5.Measure the clearance C between the air intake nose and the air intake flap.
  • the clearance C should be between 0.5 mm (0.0197 in.) to 2.5 mm (0.0984 in.) with the air intake flap flexible seal compressed lightly with a maximum of 0.5 mm (0.0197 in.).
5. Close-up
Subtask 49-16-00-865-077-A ** ON A/C NOT FOR ALL
A. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
PANELDESIGNATIONFINLOCATION
** ON A/C NOT FOR ALL
49VUAPU/FUEL/BLOW OFF/PUMP2QCB14
** ON A/C NOT FOR ALL
121VUAPU/FUEL/BLOW OFF/CTL1QCK39
** ON A/C NOT FOR ALL
121VUAPU/FUEL/LP VALVE/CTL1QFM40
121VUAPU/FUEL/LP VALVE/SPLY2QFM39
121VUAPU/FUEL/PUMP/CTL3QCM38
** ON A/C NOT FOR ALL
121VUAPU/FUEL/BLOW OFF/CTL1QCP38
Subtask 49-16-00-410-065-A ** ON A/C NOT FOR ALL
B. Aircraft Maintenance Configuration
   (1) On the ECAM control panel 11VU put the two brightness control knobs to the OFF position.
   (2) Put the related hydraulic system in the pressurized configuration (Ref. AMM TASK 29-00-00-864-001).
   (3) De-energize the ground service network
(Ref. AMM TASK 24-42-00-862-001)
   (4) Make sure that the work area is clean and clear of tools and other items.
   (5) Remove the ground support and maintenance equipment, the special and standard tools and all other items.
   (6) Remove the access platform(s).
[Rev.10 from 2021] 2026.04.01 12:42:32 UTC
"Aviabrain" 2025