Removal of the Wing Tank Fuel Quantity Indicating Probe Fused/Shorting Plug Connectors

TASK 28-42-43-000-008-A
Removal of the Wing Tank Fuel Quantity Indicating Probe Fused/Shorting Plug Connectors

WARNING: PUT THE SAFETY DEVICES AND THE WARNING NOTICES IN POSITION BEFORE YOU START A TASK ON OR NEAR:

THE FLIGHT CONTROLS
THE FLIGHT CONTROL SURFACES
THE LANDING GEAR AND THE RELATED DOORS
COMPONENTS THAT MOVE.

MOVEMENT OF COMPONENTS CAN KILL OR CAUSE INJURY TO PERSONS AND/OR CAN CAUSE DAMAGE TO THE EQUIPMENT.

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)
No specific	AR	CAP - BLANKING
No specific	AR	SAFETY BARRIER(S)
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
574BB, 674BB

C. Referenced Information

REFERENCE	DESIGNATION
Wing Tank Fuel Quantity Indicating Probe Fused Plug Connectors - Location and Detail ** ON A/C NOT FOR ALL
Wing Tank Fuel Quantity Indicating Probe Shorting Plug Connectors - Location and Detail ** ON A/C NOT FOR ALL

3. Job Set-up
Subtask 28-42-43-941-065-A

A. Safety Precautions
(1) Put the SAFETY BARRIER(S) in position.

Subtask 28-42-43-865-071-A

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
49VU	FUEL/FQI/CHAN/1	1QT	A13
** ON A/C NOT FOR ALL
121VU	FUEL/FQI/CHANNEL/1 AND 2	8QT	L26
121VU	FUEL/HI/LVL/SPLY	1QJ	L25
** ON A/C ALL
121VU	FUEL/FQI/CHAN/2	2QT	M27
** ON A/C NOT FOR ALL
121VU	FUEL/FQI/CHANNEL/1 AND 2	8QT	L25
121VU	FUEL/HI/LVL/SPLY	1QJ	L24

Subtask 28-42-43-010-065-A

C. Get Access
(1) Put the ACCESS PLATFORM 3M (10 FT) below the applicable wing trailing edge at the false rear spar, zone 574(674).
(2) Open the applicable access panel:

for the left wing, open 574BB
for the right wing, open 674BB.

4. Procedure
Subtask 28-42-43-020-095-A ** ON A/C NOT FOR ALL

A. Removal of the Fused Plug Connectors
(1) Remove the nuts (4) and the screws (3) and disconnect the lanyards (2) from the support bracket.
(2) Remove the fused plug connectors (1) from the harness connectors (5).
(3) Put CAP - BLANKING on the disconnected electrical connectors.

Subtask 28-42-43-020-095-B ** ON A/C NOT FOR ALL

A. Removal of the Shorting Plug Connectors
(1) Remove the nuts (4) and the screws (3) and disconnect the lanyards (2) from the support bracket.
(2) Remove the shorting plug connectors (1) from the harness connectors (5).
(3) Put CAP - BLANKING on the disconnected electrical connectors.

[Rev.10 from 2021] 2026.04.02 06:18:10 UTC