Reactivation of the Blower Fan

TASK 21-26-00-440-006-A
Reactivation of the Blower Fan

1. Reason for the Job
MMEL 21-26-01B
AVIONICS BLOWER FAN
MMEL 12-34-56B
AVIONICS BLOWER FAN (FUNC-CODE:21-26-01 ITEM-LIST-NBR:01)
2. Job Set-up Information
A. 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)

3. Job Set-up
Subtask 21-26-00-869-108-A

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

4. Procedure
Subtask 21-26-00-440-055-A

A. On the VENTILATION part of the overhead control and indicating panel 22VU:

push the BLOWER pushbutton switch (the OVRD legend goes off).

5. Close-up
Subtask 21-26-00-941-093-A

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

Subtask 21-26-00-862-073-A

B. 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