Reactivation of the Cabin Recirculation Fan - FAA Operators Only

TASK 21-21-51-440-801-A
Reactivation of the Cabin Recirculation Fan - FAA Operators Only

ZONE: 210
FIN: 14HG
FIN: 15HG

1. Reason for the Job
MMEL 21-21-01
CABIN FANS (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 21-21-51-861-052-A

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

4. Procedure
Subtask 21-21-51-865-054-A

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
122VU	AIR COND/RECIRC FAN/R/SPLY	3HG	W18
122VU	AIR COND/RECIRC FAN/L/SPLY	1HG	X18

Subtask 21-21-51-440-050-A

B. Reactivation of the Cabin Recirculation Fan - FAA Operators Only
(1) Make sure that LH cabin-recirculation fan 1 is not defective:
(a) Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):

1HG.

(2) Make sure that RH cabin-recirculation fan 2 is not defective:
(a) Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):

3HG.

5. Close-up
Subtask 21-21-51-862-052-A

A. 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 06:10:55 UTC