Reactivation of the Blower Fan - FAA Operators Only

TASK 21-26-00-440-808-A
Reactivation of the Blower Fan - FAA Operators Only

ZONE: 210
FIN: 20HQ

1. Reason for the Job
MMEL 21-26-01
BLOWER FAN (FAA ONLY)
2. Job Set-up Information
A. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
210	CKPT,FWD COMPT BHD TO FLT COMPT BULKHEAD

B. 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 21-26-00-861-108-A

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

4. Procedure
Subtask 21-26-00-865-136-A

A. Table of the circuit breakers used in this procedure:

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
123VU	AVNCS VENT/BLOWER/FAN	1HQ	AD10

Subtask 21-26-00-440-074-A

B. Reactivation of the Blower Fan - FAA Operators Only
(1) Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):

(2) In the cockpit, on the VENTILATION section of overhead panel 22VU:
(a) Push the BLOWER pushbutton switch (the OVRD legend goes off).

5. Close-up
Subtask 21-26-00-941-111-A

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

Subtask 21-26-00-862-109-A

B. Aircraft Maintenance Configuration
(1) De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).

[Rev.10 from 2021] 2026.04.02 06:10:58 UTC