DOC AIRBUS | AMM A320FInspection/Check of the Skin Heat Exchanger (Outlet Duct)
TASK 21-26-42-200-002-A
Inspection/Check of the Skin Heat Exchanger (Outlet Duct)
To examine the condition around the drain holes in the skin heat exchanger.
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 21-26-42-020-053-B
Subtask 21-26-42-410-052-A
[Rev.10 from 2021]
2026.04.02 06:47:59 UTC
Inspection/Check of the Skin Heat Exchanger (Outlet Duct)
WARNING:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
1. Reason for the JobTo examine the condition around the drain holes in the skin heat exchanger.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | AR | ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE |
| No specific | AR | SAFETY CLIP - CIRCUIT BREAKER |
| No specific | AR | SCRAPER - PLASTIC |
| No specific | AR | SPATULA - NON METALLIC |
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.06CMD9) | Silicone Adhesive Sealant-General Purpose One part legacy |
| (Material No.08BBC1) | Non Aqueous Cleaner-- Naphta based and Alcohol - |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 812 |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 21-26-42-200-802-A | Inspection/Check of the Honeycomb Grids |
| 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 |
Outlet DuctCAUTION:
USE ONLY THE GROUND SERVICE NETWORK TO SUPPLY ELECTRICITY BECAUSE THE AVIONICS VENTILATION SYSTEM IS NOT SERVICEABLE. IF YOU ENERGIZE THE AIRCRAFT ELECTRICAL CIRCUITS WITHOUT THE VENTILATION SYSTEM YOU WILL CAUSE DAMAGE TO ELECTRICAL EQUIPMENT.
Subtask 21-26-42-861-053-A Subtask 21-26-42-865-053-A B. Open, safety and tag this(these) circuit breaker(s):
Subtask 21-26-42-010-053-A | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C ALL | |||
| 49VU | AIR COND/AVNCS VENT/CTL | 6HQ | D06 |
| 49VU | AIR COND/AVNCS VENT/CTL | 5HQ | D05 |
C. Get Access
(1) Put the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position at the access door 812.
(2) Open the access door 812.
4. Procedure(1) Put the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position at the access door 812.
(2) Open the access door 812.
Subtask 21-26-42-020-053-B
DELETED
Subtask 21-26-42-210-053-A B. Make an Inspection of the Internal Structure
(1) Carefully examine the internal structure of the heat exchanger, specially the area with the drain holes.
(2) Make sure that this area has no corrosion, cracks, blocked drain holes, unwanted objects. Clean, if necessary.
(3) With a SCRAPER - PLASTIC, remove the gaskets (23), (25) and all bonding compound from the heat exchanger and the ducts. Discard the gaskets (23) and (25).
(4) Clean the contact faces of the heat exchanger and the ducts with cleaning agent Non Aqueous Cleaner-- Naphta based and Alcohol - (Material No.08BBC1) .
(5) Make sure that the contact faces of the heat exchanger have no cracks, dents or other damage.
(6) Make sure that the honeycomb grids are in the correct position inside the outlet ducts.
(7) Make sure that the ducts are not clogged.
(8) If the ducts are clogged, remove contamination and clogging from the honeycomb grids (Ref. AMM TASK 21-26-42-200-802).
(9) Make sure that the inside of the heat exchanger is clear of tools and other items.
(10) Remove the PLUG-BLANKING from each disconnected line end.
(11) Install the gaskets:
Subtask 21-26-42-420-053-B (1) Carefully examine the internal structure of the heat exchanger, specially the area with the drain holes.
(2) Make sure that this area has no corrosion, cracks, blocked drain holes, unwanted objects. Clean, if necessary.
(3) With a SCRAPER - PLASTIC, remove the gaskets (23), (25) and all bonding compound from the heat exchanger and the ducts. Discard the gaskets (23) and (25).
(4) Clean the contact faces of the heat exchanger and the ducts with cleaning agent Non Aqueous Cleaner-- Naphta based and Alcohol - (Material No.08BBC1) .
(5) Make sure that the contact faces of the heat exchanger have no cracks, dents or other damage.
(6) Make sure that the honeycomb grids are in the correct position inside the outlet ducts.
(7) Make sure that the ducts are not clogged.
(8) If the ducts are clogged, remove contamination and clogging from the honeycomb grids (Ref. AMM TASK 21-26-42-200-802).
(9) Make sure that the inside of the heat exchanger is clear of tools and other items.
(10) Remove the PLUG-BLANKING from each disconnected line end.
(11) Install the gaskets:
WARNING:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
(a) With a SPATULA - NON METALLIC, apply a layer of bonding compound Silicone Adhesive Sealant-General Purpose One part legacy (Material No.06CMD9) to the contact faces of the heat exchanger and the ducts. You must wait 5 minutes before you install the gaskets and the ducts. DELETED
5. Close-upSubtask 21-26-42-410-052-A
A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the access door 812.
(3) Remove the access platform(s).
Subtask 21-26-42-865-054-A (1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the access door 812.
(3) Remove the access platform(s).
B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
Subtask 21-26-42-862-053-A | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C ALL | |||
| 49VU | AIR COND/AVNCS VENT/CTL | 6HQ | D06 |
| 49VU | AIR COND/AVNCS VENT/CTL | 5HQ | D05 |