Reactivation of the Avionics Equipment Ventilation Computer (AEVC)

TASK 21-26-00-440-005-A
Reactivation of the Avionics Equipment Ventilation Computer (AEVC)

1. Reason for the Job
MMEL 21-26-10A
AVIONICS EQUIPMENT VENTILATION COMPUTER (AEVC)
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. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
824

C. Referenced Information

REFERENCE	DESIGNATION
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 52-41-00-010-002-A	Open the Avionics Compartment Doors for Access
TASK 52-41-00-410-002-A	Close the Avionics Compartment Doors after Access
Skin Air-Inlet Valve

3. Job Set-up
Subtask 21-26-00-861-078-A

A. Aircraft Maintenance Configuration
(1) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).

Subtask 21-26-00-010-099-A

B. Get Access
(1) Put the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position at the access door 824.
(2) Open the access door 824 (Ref. AMM TASK 52-41-00-010-002).

4. Procedure
Subtask 21-26-00-440-050-A

A. Reactivation of the skin air inlet valve
(1) On the VENTILATION section of the overhead panel 22VU:

push the BLOWER and EXTRACT pushbutton switches (on the EXTRACT pushbutton switch, the OVRD legend goes off on the BLOWER pushbutton switch, the FAULT LEGEND is on).

(2) On the skin air inlet valve 15HQ:

push the PUSH latch to release the handle
pull the handle and set the deactivation switch to ON
put the handle back to its initial position and latch it.

5. Close-up
Subtask 21-26-00-941-091-A

A. Aircraft Maintenance Configuration
(1) Remove the WARNING NOTICE(S).

Subtask 21-26-00-410-096-A

B. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the access door 824 (Ref. AMM TASK 52-41-00-410-002).
(3) Remove the access platform(s).
(4) Remove the WARNING NOTICE(S).

Subtask 21-26-00-862-078-A

C. De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).

[Rev.10 from 2021] 2026.04.02 06:10:59 UTC