Removal of the System 1 (2) Transformer

TASK 33-14-51-000-002-A
Removal of the System 1 (2) Transformer

ZONE: 212
FIN: 36LP
FIN: 37LP

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
212	COCKPIT

C. Referenced Information

REFERENCE	DESIGNATION
System 1 (2) Transformer

3. Job Set-up
Subtask 33-14-51-865-052-A

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
122VU	LIGHTING/TST/BOARD/SPLY	30LP	X06
FOR FIN: 36LP (XFMRSYS 2)
122VU	LIGHTING/ANN LT SPLY/XFMR/BUS 2	27LP	X05
FOR FIN: 37LP (XFMRSYS 1)
122VU	LIGHTING/ANN LT SPLY/XFMR/BUS 1	26LP	X04

Subtask 33-14-51-010-051-A

B. Get Access
(1) In the cockpit, remove the panels 121VU and/or 122VU which give access to the panel 120VU.
(2) Loosen the quick-disconnect fasteners of these panels:
(a) FOR [37LP] (XFMR-SYS 1)
122VU
(b) FOR [36LP] (XFMR-SYS 2)
122VU
121VU
(3) Pull these panels to the front.

4. Procedure
Subtask 33-14-51-020-051-A

A. Removal of the Transformer
(1) Disconnect the movable connector (4) of the defective transformer (1). Put a CAP - BLANKING on the disconnected connector.
(2) Loosen the four screws (3) and the washers (2) that attach the defective transformer (1) to the structure.
(3) Remove the transformer (1).

[Rev.10 from 2021] 2026.04.01 00:53:06 UTC