Installation of the Fuel Quantity Preselector

TASK 28-42-21-400-002-A
Installation of the Fuel Quantity Preselector

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.

FIN: 10QT ** ON A/C NOT FOR ALL

1. Reason for the Job
Self Explanatory
2. Job Set-up Information
A. Consumable Materials

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

B. Referenced Information

REFERENCE	DESIGNATION
TASK 28-42-00-710-001-A	Operational Test of the Fuel Quantity Indicating-System
TASK 28-42-00-740-001-A	Status Report (BITE)
Fuel Quantity Preselector 10QT

3. Job Set-up
Subtask 28-42-21-865-053-A ** ON A/C NOT FOR ALL

A. 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/FQI/CHAN/2	2QT	M27

4. Procedure
Subtask 28-42-21-420-053-A ** ON A/C NOT FOR ALL

A. Preparation for Installation
(1) Clean the component interface and the adjacent areas with a Textile-Lint free Cotton - (Material No.14SBA1) made moist with Non Aqueous Cleaner-General - - (Material No.08BAA9) .
(2) Make sure that the parts retained from the removed component are clean and in the correct condition.
(3) Do an inspection of the component interfaces and the adjacent area.

Subtask 28-42-21-420-051-B ** ON A/C NOT FOR ALL

B. Installation of the Fuel Quantity Preselector 10QT
(1) Remove the CAP-BLANKING from each electrical connector and receptacle.

CAUTION: DO NOT PULL THE PRESELECTOR TOO FAR AND DO NOT LET IT HANG ON THE ELECTRICAL CABLE. THIS WILL PREVENT DAMAGE TO THE ELECTRICAL CABLE.

(2) Install the preselector (2) in the mounting frame. Make sure that the spigot on the preselector engages correctly in the back plate.
(3) Connect the electrical connector (1) to the preselector (2).
(4) Tighten the two quick-release fasteners (3).

Subtask 28-42-21-865-054-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/FQI/CHAN/2	2QT	M27

Subtask 28-42-21-710-051-A ** ON A/C NOT FOR ALL

D. Operational Test
(1) Do an operational test of the fuel quantity preselector lights (Ref. AMM TASK 28-42-00-710-001).

Subtask 28-42-21-740-051-A ** ON A/C NOT FOR ALL

E. BITE Test
(1) Do a status report (BITE) of the fuel quantity indication system (Ref. AMM TASK 28-42-00-740-001).

5. Close-up
Subtask 28-42-21-942-051-A ** ON A/C NOT FOR ALL

A. Removal of Equipment
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the ground support and maintenance equipment, the special and standard tools and all other items.

[Rev.9 from 2019] 2026.04.02 06:18:08 UTC