Installation of the Skin Heat Exchanger

TASK 21-26-45-400-001-A
Installation of the Skin Heat Exchanger

CAUTION: 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.

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.06AEB2)	Polysulfide Sealant-Low Adhesion Fillet Structure

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
824

D. Referenced Information

REFERENCE	DESIGNATION
TASK 21-26-00-710-004-A	Operational Check of Ditching Configuration Control Circuit
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 25-31-41-400-001-A	Installation of the Forward Galley Unit
TASK 25-41-41-400-001-A	Installation of Lavatory A
TASK 25-41-41-400-001-B	Installation of Lavatory A
TASK 25-80-00-400-001-A	Installation of the Insulation Blankets
TASK 52-41-00-410-002-A	Close the Avionics Compartment Doors after Access
Skin Heat Exchanger

3. Job Set-up
Subtask 21-26-45-861-051-A

A. Make sure that the ground service network is energized
(Ref. AMM TASK 24-42-00-861-001).

Subtask 21-26-45-865-051-A

B. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
49VU	AIR COND/AVNCS VENT/CTL	6HQ	D06

Subtask 21-26-45-010-051-A

C. Get Access
(1) Make sure that the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE is in position at the access door 824.
(2) Make sure that the access door 824 is open.

4. Procedure
Subtask 21-26-45-420-050-A

A. Installation of the Skin Heat Exchanger
(1) Apply Polysulfide Sealant-Low Adhesion Fillet Structure (Material No.06AEB2) between the contact surfaces of the panels (3) of the skin heat exchanger and the self-locking nut plates (4).
(2) Attach the panels (3) of the skin heat exchanger with washers (2) and screws (1).

Subtask 21-26-45-710-050-A

B. Test
(1) Do the operational test of the control circuit of the ditching configuration (Ref. AMM TASK 21-26-00-710-004).
(2) On the upper ECAM display unit, make sure that there is no warning related to the avionics ventilation system.
(3) Make sure that there is no leak on the skin heat exchanger.

Subtask 21-26-45-420-051-A

C. Installation of the Insulation Blankets, Galley and Lavatory
(1) Install all the insulation blankets between FR12 and FR14 above and below the floor panels (Ref. AMM TASK 25-80-00-400-001).
(2) Install the galley unit at location 1, if removed (Ref. AMM TASK 25-31-41-400-001).
(3) Install the lavatory A, if removed (Ref. AMM TASK 25-41-41-400-001).

5. Close-up
Subtask 21-26-45-410-050-A

A. Close Access
(1) Close the access door 824 (Ref. AMM TASK 52-41-00-410-002).
(2) Remove the access platform(s).

Subtask 21-26-45-865-052-A

B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
49VU	AIR COND/AVNCS VENT/CTL	6HQ	D06

Subtask 21-26-45-862-050-A

C. De-energize the ground service network
(Ref. AMM TASK 24-42-00-862-001).

[Rev.10 from 2021] 2026.04.02 06:11:07 UTC