DOC AIRBUS | AMM A320FDeactivation of the Emergency Ram-Air Inlet in closed Position
TASK 21-55-00-040-002-A
Deactivation of the Emergency Ram-Air Inlet in closed Position
MMEL 21-55-01A
EMERGENCY RAM AIR INLET
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 21-55-00-861-053-A Subtask 21-55-00-865-053-A
Subtask 21-55-00-040-051-A
Subtask 21-55-00-410-050-A
[Rev.10 from 2021]
2026.04.02 06:11:32 UTC
Deactivation of the Emergency Ram-Air Inlet in closed Position
FIN: 7HZ
1. Reason for the JobMMEL 21-55-01A
EMERGENCY RAM AIR INLET
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | 1 | ACCESS PLATFORM 1M (3 FT)-ADJUSTABLE |
| No specific | 2 | CAP - BLANKING, PLASTIC |
| No specific | AR | SAFETY CLIP - CIRCUIT BREAKER |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 191BB |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 12-33-21-618-001-A-01 | Pre-conditioning through the HP Ground Connection |
| TASK 12-33-21-618-001-A-02 | Pre-conditioning with the APU |
| 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 53-35-13-000-002-A | Removal of the Quick-Release Access Panels from the Belly Fairing Structure |
| TASK 53-35-13-400-002-A | Installation of the Quick-Release Access Panels on the Belly Fairing Structure |
Emergency Ram Air-Inlet Actuator - Component LocationSubtask 21-55-00-861-053-A Subtask 21-55-00-865-053-A
B. Open, safety and tag this(these) circuit breaker(s):
Subtask 21-55-00-010-050-A | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C ALL | |||
| 49VU | AIR COND/RAM/AIR/INLET | 1HZ | D10 |
C. Get Access
(1) Remove the access panel (Ref. AMM TASK 53-35-13-000-002):
(2) Put the ACCESS PLATFORM 1M (3 FT)-ADJUSTABLE in position below the access to the emergency ram-air inlet actuator (7HZ).
4. Procedure(1) Remove the access panel (Ref. AMM TASK 53-35-13-000-002):
(2) Put the ACCESS PLATFORM 1M (3 FT)-ADJUSTABLE in position below the access to the emergency ram-air inlet actuator (7HZ).
Subtask 21-55-00-040-051-A
A. Deactivation of the Emergency Ram-Air Inlet Actuator
(1) Make sure the emergency ram-air inlet is closed.
(2) Disconnect the electrical connector (1) of the emergency ram-air inlet actuator (2).
(3) Put CAP - BLANKING, PLASTIC on the disconnected connectors.
(4) Temporarily attach the electrical connector (1) to the aircraft structure.
Subtask 21-55-00-710-053-A (1) Make sure the emergency ram-air inlet is closed.
(2) Disconnect the electrical connector (1) of the emergency ram-air inlet actuator (2).
(3) Put CAP - BLANKING, PLASTIC on the disconnected connectors.
(4) Temporarily attach the electrical connector (1) to the aircraft structure.
B. Test
(1) Do the pre-conditioning with the APU (Ref. AMM TASK 12-33-21-618-001) or through the HP ground connection (Ref. AMM TASK 12-33-21-618-001).
(2) On the AIR BLEED page of the lower ECAM DU, make sure that the pack discharge-temperature indications for the two packs are normal (i.e. green indication).
(3) On the upper ECAM DU, make sure there is no fault shown for the two packs.
(4) Stop the pre-conditioning with the APU (Ref. AMM TASK 12-33-21-618-001) or through the HP ground connection (Ref. AMM TASK 12-33-21-618-001).
5. Close-up(1) Do the pre-conditioning with the APU (Ref. AMM TASK 12-33-21-618-001) or through the HP ground connection (Ref. AMM TASK 12-33-21-618-001).
(2) On the AIR BLEED page of the lower ECAM DU, make sure that the pack discharge-temperature indications for the two packs are normal (i.e. green indication).
(3) On the upper ECAM DU, make sure there is no fault shown for the two packs.
(4) Stop the pre-conditioning with the APU (Ref. AMM TASK 12-33-21-618-001) or through the HP ground connection (Ref. AMM TASK 12-33-21-618-001).
Subtask 21-55-00-410-050-A
A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Install the access panel (Ref. AMM TASK 53-35-13-400-002):
(3) Remove the access platform(s).
(4) Make an entry in the aircraft log book to record the deactivation.
Subtask 21-55-00-862-053-A (1) Make sure that the work area is clean and clear of tools and other items.
(2) Install the access panel (Ref. AMM TASK 53-35-13-400-002):
(3) Remove the access platform(s).
(4) Make an entry in the aircraft log book to record the deactivation.