Removal of the Window Heat Computer (WHC)

TASK 30-42-34-000-001-A
Removal of the Window Heat Computer (WHC)

ZONE: 121
ZONE: 122
FIN: 2DG1
FIN: 2DG2

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

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

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
121	AVIONICS COMPARTMENT
122	AVIONICS COMPARTMENT
811

C. Referenced Information

REFERENCE	DESIGNATION
Window Heat Computer (WHC)

3. Job Set-up
Subtask 30-42-34-865-050-A

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
FOR FIN: 2DG1 (WHC1)
122VU	ANTI ICE/WINDOWS/L	4DG1	X14
122VU	ANTI ICE/WHC/1	5DG1	X13
123VU	ANTI ICE/L/WHSLD	1DG1	AF10
FOR FIN: 2DG2 (WHC2)
122VU	ANTI ICE/WINDOWS/R	4DG2	W14
122VU	ANTI ICE/WHC/2	5DG2	W13
123VU	ANTI ICE/R/WHSLD	1DG2	AF03

Subtask 30-42-34-010-050-A

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

4. Procedure
Subtask 30-42-34-020-051-A

A. Removal of the Window Heat Computer (WHC)
(1) Disconnect the electrical connectors (4) and (5) from the WHC (3). Put CAP - BLANKING on the disconnected electrical connectors (4) and (5).
(2) Remove the screws (2) and washers (1).
(3) Remove the WHC (3).

[Rev.10 from 2021] 2026.04.01 00:30:58 UTC