Installation of the Center Tank Fuel Quantity Indicating Probe Fused Adapters

TASK 28-42-44-400-003-A
Installation of the Center Tank Fuel Quantity Indicating Probe Fused Adapters

WARNING: MAKE SURE THAT THE FLIGHT CONTROL SAFETY-LOCKS AND THE WARNING NOTICES ARE IN POSITION.

WARNING: MAKE SURE THAT THE GROUND SAFETY-LOCKS ARE IN POSITION ON THE LANDING GEAR. THIS WILL PREVENT UNWANTED MOVEMENT OF THE LANDING GEAR, AND THUS POSSIBLE INJURY TO PERSONS AND DAMAGE TO THE AIRCRAFT AND/OR 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	SAFETY BARRIER(S)

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.08BAA9)	Non Aqueous Cleaner-General - -
(Material No.14SBA1)	Textile-Lint free Cotton -

C. Referenced Information

REFERENCE	DESIGNATION
TASK 28-42-00-740-001-A	Status Report (BITE)
TASK 28-46-00-740-001-A	Functional (BITE) Test
TASK 32-12-00-410-001-A	Close the Main Gear Doors after Access
Centre Tank Fuel Quantity Indicating Probe Fused Adapters - Location and Detail

3. Job Set-up
Subtask 28-42-44-941-056-A ** ON A/C NOT FOR ALL

A. Safety Precautions
(1) Make sure that the SAFETY BARRIER(S) are in position.

Subtask 28-42-44-860-052-A ** ON A/C NOT FOR ALL

B. Aircraft Maintenance Configuration
(1) Make sure the ACCESS PLATFORM 3M (10 FT) is in position below zone 142.
(2) Make sure that the 460005835 SLEEVE - GROUND LOCK is on the applicable MLG door actuating-cylinder.

Subtask 28-42-44-865-056-A ** ON A/C NOT FOR ALL

C. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:

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

4. Procedure
Subtask 28-42-44-420-055-A ** ON A/C NOT FOR ALL

A. Preparation for Installation
(1) Clean the component interface and/or the adjacent area with a Textile-Lint free Cotton - (Material No.14SBA1) made moist with Non Aqueous Cleaner-General - - (Material No.08BAA9) .
(2) Do an inspection of the component interfaces and the adjacent area.

Subtask 28-42-44-420-056-A ** ON A/C NOT FOR ALL

B. Installation of the Fused Adapters
(1) Remove the blanking caps from the electrical connectors.
(2) Install the fused adapters (2) in the center tank connectors (3).
(3) Connect the wiring connectors (1) to the fused adapters (2).

Subtask 28-42-44-865-057-A ** ON A/C NOT FOR ALL

C. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):

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

Subtask 28-42-44-740-054-A ** ON A/C NOT FOR ALL

D. Test
(1) Do a status report (BITE) of the fuel-quantity indicating system (Ref. AMM TASK 28-42-00-740-001).
(2) Do a functional (BITE) test of the fuel-tank level-sensing system (Ref. AMM TASK 28-46-00-740-001).

5. Close-up
Subtask 28-42-44-410-054-A ** ON A/C NOT FOR ALL

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the MLG doors (Ref. AMM TASK 32-12-00-410-001).

Subtask 28-42-44-942-055-A ** ON A/C NOT FOR ALL

B. Removal of Equipment
(1) Remove the safety barriers.
(2) Remove the WARNING NOTICE(S).
(3) Remove the access platform(s).
(4) Remove the ground support and maintenance equipment, the special and standard tools and all other items.

[Rev.10 from 2021] 2026.04.02 06:18:11 UTC