Reactivation of the Blower Fan - FAA Operators Only

TASK 21-26-00-440-803-A
Reactivation of the Blower Fan - FAA Operators Only

ZONE: 210
FIN: 20HQ
Task Summary

Access	Test	Specific Tools	Mhr	E/T	Nb Men
NO	YES	NO	0.5	0.5	1

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 21-26-00-440-006-A	Reactivation of the Blower Fan
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 21-26-00-861-097-A

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

4. Procedure
Subtask 21-26-00-865-127-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 21-26-00-440-070-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):

1HQ.

(2) Reactivate the blower fan (Ref. AMM TASK 21-26-00-440-006).
(3) In the cockpit, on the VENTILATION section of overhead panel 22VU:
(a) Make sure that the BLOWER pushbutton switch is pushed (the OVRD legend is off).

5. Close-up
Subtask 21-26-00-941-107-A

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

Subtask 21-26-00-862-100-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 06:10:57 UTC