DOC AIRBUS | AMM A320FDetailed Inspection of Actuator Mechanism and Inlet Flap for Excessive Play and Check Gap between Inlet Nose and Diffuser Ramp
TASK 21-61-51-200-001-A
Detailed Inspection of Actuator Mechanism and Inlet Flap for Excessive Play and Check Gap between Inlet Nose and Diffuser Ramp
Refer to the MPD TASK: 215000-03
DETAILED INSPECTION OF ACTUATOR MECHANISM AND INLET FLAP FOR EXCESSIVE PLAY AND CHECK GAP BETWEEN INLET NOSE AND DIFFUSER RAMP
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Work Zones and Access Panels
C. Referenced Information
3. Job Set-up
Subtask 21-61-51-861-053-A Subtask 21-61-51-865-062-A
Subtask 21-61-51-220-050-A
Subtask 21-61-51-865-063-A
[Rev.10 from 2021]
2026.04.02 06:11:40 UTC
Detailed Inspection of Actuator Mechanism and Inlet Flap for Excessive Play and Check Gap between Inlet Nose and Diffuser Ramp
WARNING:
MAKE SURE THAT AIR IS NOT SUPPLIED TO THE AIR CONDITIONING SYSTEM FROM THE MAIN ENGINE, THE APU OR A GROUND SOURCE.
HOT COMPRESSED AIR CAN CAUSE INJURY TO PERSONNEL.
NOTE: The procedure is the same for the left and the right air inlet flap.
ZONE: 190
1. Reason for the JobRefer to the MPD TASK: 215000-03
DETAILED INSPECTION OF ACTUATOR MECHANISM AND INLET FLAP FOR EXCESSIVE PLAY AND CHECK GAP BETWEEN INLET NOSE AND DIFFUSER RAMP
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | 1 | RULER - STEEL |
| No specific | AR | SAFETY CLIP - CIRCUIT BREAKER |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 190 | BELLY FAIR, AIR CONDITIONING & HYD COMPT |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 21-61-00-300-001-A | Attachment and Linkage Components - Repair/Replacement |
| TASK 21-61-51-000-003-A | Removal of the Air-Inlet Flap Mechanism |
| TASK 21-61-51-200-003-A | Air-Inlet Flap Mechanism - In-Service Wear Limits |
| TASK 21-61-51-400-003-A | Installation of the Air-Inlet Flap Mechanism |
| TASK 21-61-51-820-001-A | Adjustment of the Air Inlet Flap |
| 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) |
Inspection Measurement LocationSubtask 21-61-51-861-053-A Subtask 21-61-51-865-062-A
B. Open, safety and tag this(these) circuit breaker(s):
Subtask 21-61-51-941-054-A | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| FOR FIN: 8HH (P1 RAM AIR IN ACTUATOR) | |||
| 49VU | AIR COND/TEMP CTL/SYS 1 CHAN B/28VDC | 52HH | D08 |
| ** ON A/C NOT FOR ALL | |||
| 122VU | AIR COND/PACK TEMP/CTL SYS1/1/115VAC | 1HH | X22 |
| 122VU | AIR COND/PACK TEMP/CTL SYS1/1/28VDC | 3HH | X21 |
| 122VU | AIR COND/PACK TEMP CTL SYS2/1/28VDC | 4HH | Y19 |
| 122VU | AIR COND/PACK TEMP CTL SYS2/1/115VAC | 2HH | Y18 |
| ** ON A/C NOT FOR ALL | |||
| 122VU | AIR COND/TEMP CTL SYS 1/CHAN A/115VAC | 49HH | X22 |
| 122VU | AIR COND/TEMP CTL SYS 1/CHAN A/28VDC | 51HH | X21 |
| 122VU | AIR COND/TEMP CTL SYS 1/CHAN B/115VAC | 50HH | Y18 |
| ** ON A/C NOT FOR ALL | |||
| FOR FIN: 28HH (P2 RAM AIR IN ACTUATOR) | |||
| 122VU | AIR COND/PACK TEMP/CTL SYS1/2/115VAC | 21HH | W22 |
| 122VU | AIR COND/PACK TEMP/CTL SYS1/2/28VDC | 23HH | W21 |
| 122VU | AIR COND/PACK TEMP CTL SYS2/2/28VDC | 24HH | Y21 |
| 122VU | AIR COND/PACK TEMP CTL SYS2/2/115VAC | 22HH | Y20 |
| ** ON A/C NOT FOR ALL | |||
| 122VU | AIR COND/TEMP CTL SYS 2/CHAN A/115VAC | 53HH | W22 |
| 122VU | AIR COND/TEMP CTL SYS 2/CHAN A/28VDC | 55HH | W21 |
| 122VU | AIR COND/TEMP CTL SYS 2/CHAN B/28VDC | 56HH | Y21 |
| 122VU | AIR COND/TEMP CTL SYS 2/CHAN B/115VAC | 54HH | Y20 |
C. Safety Precautions
(1) On the panel 30VU:
(a) Make sure that the APU BLEED and the ENG BLEED/1(2) pushbutton switches are released.
(b) Put a warning notice in position to tell persons not to operate these pushbutton switches.
(2) On the HP ground connector put a warning notice in position to tell persons not to supply the ground air.
4. Procedure(1) On the panel 30VU:
(a) Make sure that the APU BLEED and the ENG BLEED/1(2) pushbutton switches are released.
(b) Put a warning notice in position to tell persons not to operate these pushbutton switches.
(2) On the HP ground connector put a warning notice in position to tell persons not to supply the ground air.
Subtask 21-61-51-220-050-A
A. Measurement of the Air-Inlet Flap Backlash and the Air-Inlet Flap Gap
(1) At the centre line of the air-inlet flap (1) and the diffuser nose (2):
(a) Use the RULER - STEEL and measure and record dimensions A and B.
(3) Subtract dimension A from dimension B. This will give you the backlash that is there in the air-inlet flap system.
(4) If the backlash is more than 3 MM (0.1181 IN.), do a check of the in-service wear limits of the air-inlet flap mechanism (Ref. AMM TASK 21-61-51-000-003) and (Ref. AMM TASK 21-61-51-200-003):
(a) If necessary, replace the damaged parts (Ref. AMM TASK 21-61-51-400-003) and (Ref. AMM TASK 21-61-00-300-001).
(b) Do a check of the air-inlet flap gap and adjust it if necessary (Ref. AMM TASK 21-61-51-820-001).
(5) Make sure that the work area is clean and clear of tools and other items.
5. Close-up(1) At the centre line of the air-inlet flap (1) and the diffuser nose (2):
(a) Use the RULER - STEEL and measure and record dimensions A and B.
NOTE: When you apply the load (hand pressure), you will get the measurement for dimension B.
(2) Do not apply too much pressure with your hand. If you put too much pressure, it can give an incorrect measurement. (3) Subtract dimension A from dimension B. This will give you the backlash that is there in the air-inlet flap system.
(4) If the backlash is more than 3 MM (0.1181 IN.), do a check of the in-service wear limits of the air-inlet flap mechanism (Ref. AMM TASK 21-61-51-000-003) and (Ref. AMM TASK 21-61-51-200-003):
(a) If necessary, replace the damaged parts (Ref. AMM TASK 21-61-51-400-003) and (Ref. AMM TASK 21-61-00-300-001).
(b) Do a check of the air-inlet flap gap and adjust it if necessary (Ref. AMM TASK 21-61-51-820-001).
(5) Make sure that the work area is clean and clear of tools and other items.
Subtask 21-61-51-865-063-A
A. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
Subtask 21-61-51-410-055-A | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| FOR FIN: 8HH (P1 RAM AIR IN ACTUATOR) | |||
| 49VU | AIR COND/TEMP CTL/SYS 1 CHAN B/28VDC | 52HH | D08 |
| ** ON A/C NOT FOR ALL | |||
| 122VU | AIR COND/PACK TEMP/CTL SYS1/1/115VAC | 1HH | X22 |
| 122VU | AIR COND/PACK TEMP/CTL SYS1/1/28VDC | 3HH | X21 |
| 122VU | AIR COND/PACK TEMP CTL SYS2/1/28VDC | 4HH | Y19 |
| 122VU | AIR COND/PACK TEMP CTL SYS2/1/115VAC | 2HH | Y18 |
| ** ON A/C NOT FOR ALL | |||
| 122VU | AIR COND/TEMP CTL SYS 1/CHAN A/115VAC | 49HH | X22 |
| 122VU | AIR COND/TEMP CTL SYS 1/CHAN A/28VDC | 51HH | X21 |
| 122VU | AIR COND/TEMP CTL SYS 1/CHAN B/115VAC | 50HH | Y18 |
| ** ON A/C NOT FOR ALL | |||
| FOR FIN: 28HH (P2 RAM AIR IN ACTUATOR) | |||
| 122VU | AIR COND/PACK TEMP/CTL SYS1/2/115VAC | 21HH | W22 |
| 122VU | AIR COND/PACK TEMP/CTL SYS1/2/28VDC | 23HH | W21 |
| 122VU | AIR COND/PACK TEMP CTL SYS2/2/28VDC | 24HH | Y21 |
| 122VU | AIR COND/PACK TEMP CTL SYS2/2/115VAC | 22HH | Y20 |
| ** ON A/C NOT FOR ALL | |||
| 122VU | AIR COND/TEMP CTL SYS 2/CHAN A/115VAC | 53HH | W22 |
| 122VU | AIR COND/TEMP CTL SYS 2/CHAN A/28VDC | 55HH | W21 |
| 122VU | AIR COND/TEMP CTL SYS 2/CHAN B/28VDC | 56HH | Y21 |
| 122VU | AIR COND/TEMP CTL SYS 2/CHAN B/115VAC | 54HH | Y20 |
B. Remove the WARNING NOTICE(S).
Subtask 21-61-51-862-054-A