Installation of the Wing-Tank Fuel-Level Sensors

TASK 28-46-15-400-009-A
Installation of the Wing-Tank Fuel-Level Sensors

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.

WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.

FIN: 15QJ1
FIN: 15QJ2
FIN: 16QJ1
FIN: 16QJ2
FIN: 17QJ1
FIN: 17QJ2
FIN: 23QJ1
FIN: 23QJ2
FIN: 24QJ1
FIN: 24QJ2
FIN: 25QJ1
FIN: 25QJ2
FIN: 26QJ1
FIN: 26QJ2
FIN: 27QJ1
FIN: 27QJ2
FIN: 39QJ1
FIN: 39QJ2
FIN: 40QJ1 ** ON A/C NOT FOR ALL
FIN: 40QJ2 ** ON A/C NOT FOR ALL

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	SAFETY BARRIER(S)
No specific	Torque wrench: range to between 0.067 and 0.034 m.daN (5.93 and 3.01 lbf.in )
No specific	Torque wrench: range to between 0.124 and 0.102 m.daN (10.97 and 9.03 lbf.in )
No specific	Torque wrench: range to between 0.226 and 0.204 m.daN (20.00 and 18.05 lbf.in )
No specific	Torque wrench: range to between .28 and .225 m.daN (24.78 and 19.91 lbf.in )
No specific	Torque wrench: range to between .56 and .45 m.daN (49.56 and 39.82 lbf.in )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.06ABA1)	Polysulfide Sealant-Fuel Tank Brushable -
(Material No.08BAA9)	Non Aqueous Cleaner-General - -
(Material No.14SBA1)	Textile-Lint free Cotton -

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
FOR [15QJ1] (SENSOR-LOW LEVEL 750/1500KG,L WNG TK INR FWD CHANNEL B)
FOR [16QJ1] (SENSOR-LOW LEVEL (750KG),L WNG TK INR REAR CHANNEL A)
FOR [23QJ1] (SENSOR-FULL LVL, L WNG TK INR 1 CHANNEL B)
FOR [24QJ1] (SENSOR-UNDERFULL, L WNG TK INR 1 CHANNEL B)
FOR [39QJ1] (SENSOR-LOW LVL (750KG), L WING TANK CHANNEL A)
540AB
FOR [15QJ1] (SENSOR-LOW LEVEL 750/1500KG,L WNG TK INR FWD CHANNEL B)
FOR [16QJ1] (SENSOR-LOW LEVEL (750KG),L WNG TK INR REAR CHANNEL A)
FOR [23QJ1] (SENSOR-FULL LVL, L WNG TK INR 1 CHANNEL B)
FOR [24QJ1] (SENSOR-UNDERFULL, L WNG TK INR 1 CHANNEL B)
FOR [39QJ1] (SENSOR-LOW LVL (750KG), L WING TANK CHANNEL A)
FOR [40QJ1] (SENSOR-LOW LVL (1500KG), L WING TANK CHANNEL A)
540AB
FOR [15QJ2] (SENSOR-LOW LEVEL 750/1500KG,R WNG TK INR FWD CHANNEL B)
FOR [16QJ2] (SENSOR-LOW LEVEL (750KG),R WNG TK INR REAR CHANNEL A)
FOR [23QJ2] (SENSOR-FULL LVL, R WNG TK INR 1 CHANNEL B)
FOR [24QJ2] (SENSOR-UNDERFULL, R WNG TK INR 1 CHANNEL B)
FOR [39QJ2] (SENSOR-LOW LVL (750KG), R WING TANK CHANNEL A)
640AB
FOR [15QJ2] (SENSOR-LOW LEVEL 750/1500KG,R WNG TK INR FWD CHANNEL B)
FOR [16QJ2] (SENSOR-LOW LEVEL (750KG),R WNG TK INR REAR CHANNEL A)
FOR [23QJ2] (SENSOR-FULL LVL, R WNG TK INR 1 CHANNEL B)
FOR [24QJ2] (SENSOR-UNDERFULL, R WNG TK INR 1 CHANNEL B)
FOR [39QJ2] (SENSOR-LOW LVL (750KG), R WING TANK CHANNEL A)
FOR [40QJ2] (SENSOR-LOW LVL (1500KG), R WING TANK CHANNEL A)
640AB
FOR [17QJ1] (SENSOR-HI LEVEL, LEFT WING TANK INNER CHANEL A)
540NB
FOR [17QJ1] (SENSOR-HI LEVEL, LEFT WING TANK INNER CHANEL A)
FOR [26QJ1] (SENSOR-UNDERFULL, L WNG TK INR 3 CHANNEL B)
540GB
FOR [17QJ2] (SENSOR-HI LEVEL, RIGHT WING TANK INNER CHANEL A)
640NB
FOR [17QJ2] (SENSOR-HI LEVEL, RIGHT WING TANK INNER CHANEL A)
FOR [26QJ2] (SENSOR-UNDERFULL, R WNG TK INR 3 CHANNEL B)
640GB
FOR [25QJ1] (SENSOR-UNDERFULL, L WNG TK INR 2 CHANNEL B)
540CB
540EB
FOR [25QJ2] (SENSOR-UNDERFULL, R WNG TK INR 2 CHANNEL B)
640EB
640CB
FOR [26QJ1] (SENSOR-UNDERFULL, L WNG TK INR 3 CHANNEL B)
540LB
FOR [26QJ2] (SENSOR-UNDERFULL, R WNG TK INR 3 CHANNEL B)
640LB
FOR [27QJ1] (SENSOR-FULL LVL, L WNG TK INR 2 CHANNEL B)
540JB
540PB
FOR [27QJ2] (SENSOR-FULL LVL, R WNG TK INR 2 CHANNEL B)
640JB
640PB

D. Referenced Information

REFERENCE	DESIGNATION
TASK 12-11-28-650-003-A	Pressure Refuel with Automatic Control
TASK 28-10-00-910-001-A	Safety Procedures When You Do Work in a Fuel Tank
TASK 28-10-00-910-002-A	Access to the Fuel Tanks and the Work Areas
TASK 28-25-00-650-001-A	Pressure Defuel
TASK 28-25-00-869-001-A	Fuel Transfer
TASK 28-46-00-740-001-A	Functional (BITE) Test
TASK 57-27-11-000-001-A	Removal of the Access Panel
TASK 57-27-11-000-002-A	Removal of the Access Panel
TASK 57-27-11-400-001-A	Installation of the Access Panel
TASK 57-27-11-400-002-A	Installation of the Access Panel
Sensor - 15QJ1(15QJ2), 16QJ1(16QJ2) and 17QJ1(17QJ2) ** ON A/C NOT FOR ALL
Sensor 23QJ1 (23QJ2) 24QJ1 (24QJ2) 25QJ1 (25QJ2) 26QJ1 (26QJ2) 27QJ1 (27QJ2) ** ON A/C NOT FOR ALL
Sensor- 39QJ1(39QJ2) ** ON A/C NOT FOR ALL
Sensor - 15QJ1(15QJ2), 16QJ1(16QJ2) and 17QJ1(17QJ2) ** ON A/C NOT FOR ALL
Sensor - 23QJ1(23QJ2), 24QJ1(24QJ2), 25QJ1(25QJ2), 26QJ1(26QJ2) and 27QJ1(27QJ2) ** ON A/C NOT FOR ALL
Sensors - 39QJ1(39QJ2), 40QJ1(40QJ2) ** ON A/C NOT FOR ALL

3. Job Set-up
Subtask 28-46-15-941-069-A

A. Safety Precautions

WARNING: BEFORE YOU DO WORK IN OR NEAR A FUEL TANK, MAKE SURE THAT YOU OBEY ALL THE SAFETY PROCEDURES. THIS WILL PREVENT INJURY TO PERSONS AND/OR DAMAGE TO THE AIRCRAFT.

(1) Make sure the the SAFETY BARRIER(S) are in position.
(2) You must obey the fuel safety procedures (Ref. AMM TASK 28-10-00-910-001) when you do work in a fuel tank.

Subtask 28-46-15-860-050-B ** ON A/C NOT FOR ALL

B. Aircraft Maintenance Configuration
(1) Make sure that the applicable fuel tank is defueled (Ref. AMM TASK 28-25-00-650-001).
(2) Make sure that the access platform is below the applicable access panel 540AB, 540CB, 540GB, 540JB (640AB, 640CB, 640GB, 640JB).
(3) Make sure that the applicable access panel 540AB, 540CB, 540GB, 540JB (640AB, 640CB, 640GB, 640JB) has been removed (Ref. AMM TASK 28-10-00-910-002), (Ref. AMM TASK 57-27-11-000-001) or (Ref. AMM TASK 57-27-11-000-002).

Subtask 28-46-15-860-050-D ** ON A/C NOT FOR ALL

B. Aircraft Maintenance Configuration
(1) Make sure that the applicable fuel tank is defueled (Ref. AMM TASK 28-25-00-650-001).
(2) Make sure that the access platform is below the applicable access panel 540AB, 540EB, 540LB, 540NB, 540PB (640AB, 640EB, 640LB, 640NB, 640PB).
(3) Make sure that the applicable access panel 540AB, 540EB, 540LB, 540NB, 540PB (640AB, 640EB, 640LB, 640NB, 640PB) has been removed (Ref. AMM TASK 28-10-00-910-002), (Ref. AMM TASK 57-27-11-000-001) or (Ref. AMM TASK 57-27-11-000-002).

Subtask 28-46-15-865-062-A

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/XFR VALVE1/WING/R	2QP	A11
49VU	FUEL/XFR VALVE1/WING/L	1QP	A10
** ON A/C NOT FOR ALL
49VU	FUEL/AFT LOW LVL/& OVFL/WING R	44QJ	A11
49VU	FUEL/AFT LOW LVL/& OVFL/WING L	43QJ	A10
** ON A/C NOT FOR ALL
121VU	FUEL/CTR TK/PUMPS1 AND 2/CTL AND IND	32QA	R26
121VU	FUEL/CTR TK/PUMPS1 AND 2/CTL AND IND	31QA	R25
** ON A/C NOT FOR ALL
121VU	FUEL/XFR VALVE2/WING/R	4QP	M23
121VU	FUEL/XFR VALVE2/WING/L	3QP	M22
** ON A/C NOT FOR ALL
121VU	FUEL/HI/LVL/SPLY	1QJ	L25
** ON A/C NOT FOR ALL
121VU	FUEL/CTR TK/AUTO/CTL	3QL	R27
121VU	FUEL/CTR TK/L&R XFR/CTL & IND	2QL	R26
121VU	FUEL/CTR TK/L&R XFR/CTL & IND	1QL	R25
** ON A/C NOT FOR ALL
121VU	FUEL/FWD LOW LVL/WING/R	45QJ	M23
121VU	FUEL/FWD LOW LVL/WING/L	46QJ	M22
** ON A/C NOT FOR ALL
121VU	FUEL/HI/LVL/SPLY	1QJ	L24

4. Procedure
Subtask 28-46-15-420-059-A

A. Preparation for Installation
(1) Clean the component interfaces and the adjacent areas with 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.
(3) Make sure that the parts retained from the removed component are clean and in the correct condition.

Subtask 28-46-15-420-050-A

B. Installation of the Wing-Tank Fuel-Level Sensors
(1) Install the sensor (8) with the bolts (3) and (6) and the washers (2) and (7).
(2) TORQUE the bolt (3) to between .28 and .225 m.daN (24.78 and 19.91 lbf.in )

.
(3) TORQUE the bolt (6) to between .56 and .45 m.daN (49.56 and 39.82 lbf.in )

.
(4) Apply Polysulfide Sealant-Fuel Tank Brushable - (Material No.06ABA1) to the bolts (3) and (6).
(5) Remove the blanking caps from the electrical connectors.
(6) Connect the electrical connectors of the cable (1) with the connector screws (4) and (5).
(7) TORQUE the connector screw (4) to between 0.124 and 0.102 m.daN (10.97 and 9.03 lbf.in )

.
(8) TORQUE the connector screw (5) to between 0.226 and 0.204 m.daN (20.00 and 18.05 lbf.in )

.
(9) Install the cable (1) in the cable clamp with the cable clamp screw (9).
(10) TORQUE the cable clamp screw (9) to between 0.067 and 0.034 m.daN (5.93 and 3.01 lbf.in )

Subtask 28-46-15-865-064-A

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/XFR VALVE1/WING/R	2QP	A11
49VU	FUEL/XFR VALVE1/WING/L	1QP	A10
** ON A/C NOT FOR ALL
49VU	FUEL/AFT LOW LVL/& OVFL/WING R	44QJ	A11
49VU	FUEL/AFT LOW LVL/& OVFL/WING L	43QJ	A10
** ON A/C NOT FOR ALL
121VU	FUEL/CTR TK/PUMPS1 AND 2/CTL AND IND	32QA	R26
121VU	FUEL/CTR TK/PUMPS1 AND 2/CTL AND IND	31QA	R25
** ON A/C NOT FOR ALL
121VU	FUEL/XFR VALVE2/WING/R	4QP	M23
121VU	FUEL/XFR VALVE2/WING/L	3QP	M22
** ON A/C NOT FOR ALL
121VU	FUEL/HI/LVL/SPLY	1QJ	L25
** ON A/C NOT FOR ALL
121VU	FUEL/CTR TK/AUTO/CTL	3QL	R27
121VU	FUEL/CTR TK/L&R XFR/CTL & IND	2QL	R26
121VU	FUEL/CTR TK/L&R XFR/CTL & IND	1QL	R25
** ON A/C NOT FOR ALL
121VU	FUEL/FWD LOW LVL/WING/R	45QJ	M23
121VU	FUEL/FWD LOW LVL/WING/L	46QJ	M22
** ON A/C NOT FOR ALL
121VU	FUEL/HI/LVL/SPLY	1QJ	L24

Subtask 28-46-15-740-050-A

D. BITE Test
(1) Do the tank-level-sensing functional (BITE) test (Ref. AMM TASK 28-46-00-740-001).

5. Close-up
Subtask 28-46-15-410-050-B ** 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) Install the applicable access panel, (Ref. AMM TASK 57-27-11-400-001) or (Ref. AMM TASK 57-27-11-400-002):
(a) FOR [15QJ1] (SENSOR-LOW LEVEL 750/1500KG,L WNG TK INR FWD CHANNEL B), [16QJ1] (SENSOR-LOW LEVEL (750KG),L WNG TK INR REAR CHANNEL A), [23QJ1] (SENSOR-FULL LVL, L WNG TK INR 1 CHANNEL B), [24QJ1] (SENSOR-UNDERFULL, L WNG TK INR 1 CHANNEL B), [39QJ1] (SENSOR-LOW LVL (750KG), L WING TANK CHANNEL A)
install 540AB
(b) FOR [15QJ2] (SENSOR-LOW LEVEL 750/1500KG,R WNG TK INR FWD CHANNEL B), [16QJ2] (SENSOR-LOW LEVEL (750KG),R WNG TK INR REAR CHANNEL A), [23QJ2] (SENSOR-FULL LVL, R WNG TK INR 1 CHANNEL B), [24QJ2] (SENSOR-UNDERFULL, R WNG TK INR 1 CHANNEL B), [39QJ2] (SENSOR-LOW LVL (750KG), R WING TANK CHANNEL A)
install 640AB
(c) FOR [25QJ1] (SENSOR-UNDERFULL, L WNG TK INR 2 CHANNEL B)
install 540CB
(d) FOR [25QJ2] (SENSOR-UNDERFULL, R WNG TK INR 2 CHANNEL B)
install 640CB
(e) FOR [17QJ1] (SENSOR-HI LEVEL, LEFT WING TANK INNER CHANEL A), [26QJ1] (SENSOR-UNDERFULL, L WNG TK INR 3 CHANNEL B)
install 540GB
(f) FOR [17QJ2] (SENSOR-HI LEVEL, RIGHT WING TANK INNER CHANEL A), [26QJ2] (SENSOR-UNDERFULL, R WNG TK INR 3 CHANNEL B)
install 640GB
(g) FOR [27QJ1] (SENSOR-FULL LVL, L WNG TK INR 2 CHANNEL B)
install 540JB
(h) FOR [27QJ2] (SENSOR-FULL LVL, R WNG TK INR 2 CHANNEL B)
install 640JB.

Subtask 28-46-15-410-050-D ** 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) Install the applicable access panel (Ref. AMM TASK 57-27-11-400-001) or (Ref. AMM TASK 57-27-11-400-002):
(a) FOR [15QJ1] (SENSOR-LOW LEVEL 750/1500KG,L WNG TK INR FWD CHANNEL B), [16QJ1] (SENSOR-LOW LEVEL (750KG),L WNG TK INR REAR CHANNEL A), [23QJ1] (SENSOR-FULL LVL, L WNG TK INR 1 CHANNEL B), [24QJ1] (SENSOR-UNDERFULL, L WNG TK INR 1 CHANNEL B), [39QJ1] (SENSOR-LOW LVL (750KG), L WING TANK CHANNEL A), [40QJ1] (SENSOR-LOW LVL (1500KG), L WING TANK CHANNEL A)
install 540AB
(b) FOR [15QJ2] (SENSOR-LOW LEVEL 750/1500KG,R WNG TK INR FWD CHANNEL B), [16QJ2] (SENSOR-LOW LEVEL (750KG),R WNG TK INR REAR CHANNEL A), [23QJ2] (SENSOR-FULL LVL, R WNG TK INR 1 CHANNEL B), [24QJ2] (SENSOR-UNDERFULL, R WNG TK INR 1 CHANNEL B), [39QJ2] (SENSOR-LOW LVL (750KG), R WING TANK CHANNEL A), [40QJ2] (SENSOR-LOW LVL (1500KG), R WING TANK CHANNEL A)
install 640AB
(c) FOR [25QJ1] (SENSOR-UNDERFULL, L WNG TK INR 2 CHANNEL B)
install 540EB
(d) FOR [25QJ2] (SENSOR-UNDERFULL, R WNG TK INR 2 CHANNEL B)
install 640EB
(e) FOR [26QJ1] (SENSOR-UNDERFULL, L WNG TK INR 3 CHANNEL B)
install 540LB
(f) FOR [26QJ2] (SENSOR-UNDERFULL, R WNG TK INR 3 CHANNEL B)
install 640LB
(g) FOR [17QJ1] (SENSOR-HI LEVEL, LEFT WING TANK INNER CHANEL A)
install 540NB
(h) FOR [17QJ2] (SENSOR-HI LEVEL, RIGHT WING TANK INNER CHANEL A)
install 640NB
(i) FOR [27QJ1] (SENSOR-FULL LVL, L WNG TK INR 2 CHANNEL B)
install 540PB
(j) FOR [27QJ2] (SENSOR-FULL LVL, R WNG TK INR 2 CHANNEL B)
install 640PB.

Subtask 28-46-15-650-069-A

B. Fuel Configuration
(1) Refuel, defuel or transfer fuel as necessary (Ref. AMM TASK 12-11-28-650-003), (Ref. AMM TASK 28-25-00-650-001) or (Ref. AMM TASK 28-25-00-869-001).

Subtask 28-46-15-942-056-A

C. 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 06:18:15 UTC