DOC AIRBUS | AMM A320FRemoval of the Contamination from the Environmental Control System (ECS) after Dust or Volcanic Ash Contamination
TASK 21-00-00-615-005-A
Removal of the Contamination from the Environmental Control System (ECS) after Dust or Volcanic Ash Contamination
To decontaminate the ECS from dust or volcanic ash.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Consumable Materials
C. Work Zones and Access Panels
D. Referenced Information
3. Job Set-up
Subtask 21-00-00-861-054-A Subtask 21-00-00-865-082-A
Subtask 21-00-00-200-050-A
Subtask 21-00-00-410-054-A
[Rev.10 from 2021]
2026.04.01 04:09:07 UTC
Removal of the Contamination from the Environmental Control System (ECS) after Dust or Volcanic Ash Contamination
WARNING:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
1. Reason for the JobTo decontaminate the ECS from dust or volcanic ash.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | AR | AIR SOURCE 3,45 BAR (50 PSI) - FILTERED, DRY |
| No specific | AR | BRUSH - BRISTLED, SOFT |
| No specific | AR | FLASHLIGHT |
| No specific | AR | MIRROR - INSPECTION, FLEXIBLE |
| No specific | AR | SAFETY CLIP - CIRCUIT BREAKER |
| No specific | AR | WATER - SOAPY SOLUTION |
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.08ABC1) | Aqueous Cleaner-Aircraft Exterior Pressure Spraying - |
| (Material No.08BBE1) | Non Aqueous Cleaner-- Methyl Alcohol - |
| (Material No.14SBA1) | Textile-Lint free Cotton - |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 191BB, 191KB, 192FB, 192KB |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 21-00-00-100-001-A | Cleaning of Special Components in the Environmental Control System (ECS) |
| TASK 21-52-24-000-001-A | Removal of the Heat Exchanger Unit (from the Aircraft) |
| TASK 21-52-24-000-001-A-01 | Removal of the Heat Exchanger Unit (From the Air Conditioning Pack) |
| TASK 21-52-24-400-001-A | Installation of the Heat Exchanger Unit (into the Aircraft) |
| TASK 21-52-24-400-001-A-01 | Installation of the Heat Exchanger Unit (Into the Air Conditioning Pack) |
| 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 |
ECS - Component LocationSubtask 21-00-00-861-054-A Subtask 21-00-00-865-082-A
B. Open, safety and tag this(these) circuit breaker(s):
Subtask 21-00-00-010-057-B | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| 49VU | AIR COND/FLOW/CTL &/IND1 | 1HB | D07 |
| ** ON A/C NOT FOR ALL | |||
| 49VU | AIR COND/TEMP CTL/SYS 1 CHAN B/28VDC | 52HH | D08 |
| ** ON A/C NOT FOR ALL | |||
| 122VU | AIR COND/FLOW/CTL AND IND/2 | 2HB | V21 |
| 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 SYS1/1/115VAC | 1HH | X22 |
| 122VU | AIR COND/PACK TEMP/CTL SYS1/1/28VDC | 3HH | X21 |
| 122VU | AIR COND/PACK TEMP CTL SYS2/2/28VDC | 24HH | Y21 |
| 122VU | AIR COND/PACK TEMP CTL SYS2/2/115VAC | 22HH | Y20 |
| 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 2/CHAN A/115VAC | 53HH | W22 |
| 122VU | AIR COND/TEMP CTL SYS 2/CHAN A/28VDC | 55HH | W21 |
| 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 2/CHAN B/28VDC | 56HH | Y21 |
| 122VU | AIR COND/TEMP CTL SYS 2/CHAN B/115VAC | 54HH | Y20 |
| 122VU | AIR COND/TEMP CTL SYS 1/CHAN B/115VAC | 50HH | Y18 |
C. Get Access
(1) Remove the access panels 191BB, 192FB, 191KB and 192KB (Ref. AMM TASK 53-35-13-000-002).
(2) Remove the access cover from the air plenum chamber:
4. Procedure(1) Remove the access panels 191BB, 192FB, 191KB and 192KB (Ref. AMM TASK 53-35-13-000-002).
(2) Remove the access cover from the air plenum chamber:
- remove the nuts (12), the washers (11) and,
- remove the access cover (10) and the gasket (9) from the air plenum chamber (8).
Subtask 21-00-00-200-050-A
A. Visual Inspection
(1) Use a MIRROR - INSPECTION, FLEXIBLE and a FLASHLIGHT and do a check for contamination of:
(a) The inner part of the air plenum chamber (8),
(b) The ram-air inlet (13) and,
(c) The main heat exchanger (5).
(2) If there is too much contamination, remove the contaminated components.
Subtask 21-00-00-010-056-A (1) Use a MIRROR - INSPECTION, FLEXIBLE and a FLASHLIGHT and do a check for contamination of:
(a) The inner part of the air plenum chamber (8),
(b) The ram-air inlet (13) and,
(c) The main heat exchanger (5).
(2) If there is too much contamination, remove the contaminated components.
B. Removal of the Contaminated Components
(1) Remove the heat exchanger unit (Ref. AMM TASK 21-52-24-000-001).
(2) Remove the screws (2) and washers (3) and remove the plenum (1) from the primary heat exchanger (4).
(3) Remove the screws (7) and the washers (6) and disconnect the primary heat exchanger (4) from the main heat exchanger (5).
Subtask 21-00-00-160-064-A (1) Remove the heat exchanger unit (Ref. AMM TASK 21-52-24-000-001).
(2) Remove the screws (2) and washers (3) and remove the plenum (1) from the primary heat exchanger (4).
(3) Remove the screws (7) and the washers (6) and disconnect the primary heat exchanger (4) from the main heat exchanger (5).
C. Cleaning of the Dirty Components
(2) Do a check of the ram air actuators for contamination.
(3) If there is contamination, do the cleaning procedure:
(a) Use a Textile-Lint free Cotton - (Material No.14SBA1) or the BRUSH - BRISTLED, SOFT made moist with Non Aqueous Cleaner-- Methyl Alcohol - (Material No.08BBE1) and clean the outer parts of the actuators.
(b) Dry the parts with a dry lint-free cloth or AIR SOURCE 3,45 BAR (50 PSI) - FILTERED, DRY.
(4) Do a check for contamination on the inner ducts of the heat exchangers.
(5) If they are dirty, clean all the component parts of the air-packs (Ref. AMM TASK 21-00-00-100-001).
(6) Clean the cooling ribs of the heat exchangers (Ref. AMM TASK 21-00-00-100-001).
(7) Clean the glass-fiber plenum as follows:
(a) Use the BRUSH - BRISTLED, SOFT and WATER - SOAPY SOLUTION and clean the glass-fiber and the rubber parts of the plenum.
(b) Use a Textile-Lint free Cotton - (Material No.14SBA1) or clean dry compressed air and dry the parts.
(c) Make sure that the rubber seals are not damaged and that the glass-fiber material is rigid and hard.
(d) If the seals are damaged, send the plenum to the shop for the replacement of the seals.
Subtask 21-00-00-410-055-B WARNING:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
(1) Clean the ram air inlet, the ram air outlet and the air plenum chamber (8) with the BRUSH - BRISTLED, SOFT and Aqueous Cleaner-Aircraft Exterior Pressure Spraying - (Material No.08ABC1) . (2) Do a check of the ram air actuators for contamination.
(3) If there is contamination, do the cleaning procedure:
(a) Use a Textile-Lint free Cotton - (Material No.14SBA1) or the BRUSH - BRISTLED, SOFT made moist with Non Aqueous Cleaner-- Methyl Alcohol - (Material No.08BBE1) and clean the outer parts of the actuators.
(b) Dry the parts with a dry lint-free cloth or AIR SOURCE 3,45 BAR (50 PSI) - FILTERED, DRY.
(4) Do a check for contamination on the inner ducts of the heat exchangers.
(5) If they are dirty, clean all the component parts of the air-packs (Ref. AMM TASK 21-00-00-100-001).
(6) Clean the cooling ribs of the heat exchangers (Ref. AMM TASK 21-00-00-100-001).
(7) Clean the glass-fiber plenum as follows:
(a) Use the BRUSH - BRISTLED, SOFT and WATER - SOAPY SOLUTION and clean the glass-fiber and the rubber parts of the plenum.
(b) Use a Textile-Lint free Cotton - (Material No.14SBA1) or clean dry compressed air and dry the parts.
(c) Make sure that the rubber seals are not damaged and that the glass-fiber material is rigid and hard.
(d) If the seals are damaged, send the plenum to the shop for the replacement of the seals.
D. Installation of the Clean Components
(1) Put the primary heat exchanger (4) in position on the main heat exchanger (5) and install the washers (6) and the screws (7).
(2) Put the plenum (1) in position on the primary heat exchanger (4) and install the washers (3) and screws (2).
(3) Install the heat exchanger unit (Ref. AMM TASK 21-52-24-400-001).
(4) Put the gasket (9) and the access cover (10) in position on the air plenum chamber (8) and install the washers (11) and the nuts (12).
5. Close-up(1) Put the primary heat exchanger (4) in position on the main heat exchanger (5) and install the washers (6) and the screws (7).
(2) Put the plenum (1) in position on the primary heat exchanger (4) and install the washers (3) and screws (2).
(3) Install the heat exchanger unit (Ref. AMM TASK 21-52-24-400-001).
(4) Put the gasket (9) and the access cover (10) in position on the air plenum chamber (8) and install the washers (11) and the nuts (12).
Subtask 21-00-00-410-054-A
A. Close Access
(1) Install the access panels 191BB, 192FB, 191KB and 192KB (Ref. AMM TASK 53-35-13-400-002).
(2) Make sure that the work area is clean and clear of tools and other items.
(3) Remove the WARNING NOTICE(S).
Subtask 21-00-00-862-054-A (1) Install the access panels 191BB, 192FB, 191KB and 192KB (Ref. AMM TASK 53-35-13-400-002).
(2) Make sure that the work area is clean and clear of tools and other items.
(3) Remove the WARNING NOTICE(S).