Removal of the Air Outlet Heater

TASK 21-41-51-000-001-A
Removal of the Air Outlet Heater

FIN: 3HE ** ON A/C NOT FOR ALL
FIN: 4HE ** ON A/C NOT FOR ALL

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	1	ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE
No specific	AR	CAP - BLANKING
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER
No specific	AR	WARNING NOTICE(S)

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
811
FOR [3HE] (HEATER-AIR OUTLET, L)
211AW, 211BZ
FOR [4HE] (HEATER-AIR OUTLET, R)
212AW, 212BZ

C. Referenced Information

REFERENCE	DESIGNATION
TASK 24-42-00-861-001-A	Energize the Ground Service Network from the External Power
TASK 25-13-41-000-002-A	Removal of the Sidewall Panels
Air Outlet Heater (3HE, 4HE)

3. Job Set-up
Subtask 21-41-51-861-050-A ** ON A/C NOT FOR ALL

A. Energize the ground service network
(Ref. AMM TASK 24-42-00-861-001).

Subtask 21-41-51-010-050-A ** ON A/C NOT FOR ALL

B. Get Access
(1) Put an ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE in position at the access door 811.
(2) Open the access door 811.

Subtask 21-41-51-865-053-A ** ON A/C NOT FOR ALL

C. Open, safety and tag this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
122VU	CKPT/FOOT/HEATERS	1HE	V23

Subtask 21-41-51-010-051-A ** ON A/C NOT FOR ALL

D. Get Access
(1) In the cockpit, remove the sidewall panels as necessary (Ref. AMM TASK 25-13-41-000-002):
(a) FOR [3HE] (HEATER-AIR OUTLET, L)
211BZ 211AW
(b) FOR [4HE] (HEATER-AIR OUTLET, R)
212BZ 212AW

Subtask 21-41-51-941-050-A ** ON A/C NOT FOR ALL

E. Safety Precautions
(1) On the AIR COND panel 30VU:
(a) Make sure that:

The APU BLEED pushbutton switch is released
The ENG 1 BLEED and ENG 2 BLEED pushbutton switches are released
The PACK 1 and PACK 2 pushbutton switches are released.

(b) Put a WARNING NOTICE(S) in position to tell persons not to operate these pushbutton switches.
(2) On the HP and LP ground connectors, put a WARNING NOTICE(S) in position to tell persons not to supply the ground source.

4. Procedure
Subtask 21-41-51-020-050-A ** ON A/C NOT FOR ALL

A. Removal of the Air Outlet Heater
(1) Disconnect the electrical connector (6).
(2) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
(3) Remove the clamp (4) and the duct (5) from the air outlet heater (2).
(4) Remove the four screws (7), washers (8) and nuts (9).
(5) Remove the clamp (3).
(6) Remove the air outlet heater (2).

[Rev.10 from 2021] 2026.04.02 06:11:17 UTC