Removal of the FCU

TASK 22-81-12-000-001-A
Removal of the FCU

ZONE: 210
FIN: 2CA

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	CAP - BLANKING
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER

B. Work Zones and Access Panels

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

C. Referenced Information

REFERENCE	DESIGNATION
FCU

3. Job Set-up
Subtask 22-81-12-865-050-A

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	AUTO FLT/FCU/1	9CA1	B05
** ON A/C NOT FOR ALL
49VU	AUTO FLT/FCU/1	9CA1	H11
** ON A/C ALL
121VU	AUTO FLT/FCU/2	9CA2	M21
122VU	LIGHTING/INSTL LT/GLARE/SHLD	5LF	Y05

4. Procedure
Subtask 22-81-12-020-051-B

A. Removal of the FCU

NOTE: You will continue to see the displays for some time after you open the two FCU circuit breakers. You can ignore this (it is because of the residual polarization of the liquid crystals).

(1) Hold the lower panel (6) and loosen the three Dzus fasteners (5) by a quarter turn.
(2) Open the lower panel (6).
(3) Remove the four screws (3) and washers (4) from the FCU (1).
(4) Pull the FCU (1) from its housing (8).
(5) Disconnect the electrical connectors (7).
(6) Remove the FCU (1).
(7) Put CAP - BLANKING on the electrical connectors (2) and (7).

[Rev.10 from 2021] 2026.03.31 23:11:06 UTC