Removal of the Wing-Tank Fuel-Level Sensors

TASK 28-46-15-000-001-A
Removal of the Wing-Tank Fuel-Level Sensors

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.

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: OBEY THE FUEL SAFETY PROCEDURES.

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	ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE
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
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

C. Referenced Information

REFERENCE	DESIGNATION
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 28-25-00-650-003-A	To Drain Remaining Fuel from the Wing Tanks and the Center Tank
TASK 28-25-00-650-003-A-01	To Drain Remaining Fuel from the Wing Tanks and the Center Tank
TASK 57-27-11-000-001-A	Removal of the Access Panel
TASK 57-27-11-000-002-A	Removal 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 28-46-15-941-067-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) As necessary, use the applicable SAFETY BARRIERS, specified by the operator's instructions and your local regulations.
(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 28-46-15-865-050-A

B. Open, safety and tag 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 28-46-15-650-067-A

C. Fuel Configuration
(1) Defuel the applicable fuel tank (Ref. AMM TASK 28-25-00-650-001).
(2) Drain the remaining fuel from the applicable fuel tank (Ref. AMM TASK 28-25-00-650-003).

Subtask 28-46-15-010-050-B ** ON A/C NOT FOR ALL

D. Get Access
(1) Put the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE in position below the applicable panel 540AB, 540CB, 540GB, 540JB (640AB, 640CB, 640GB, 640JB).
(2) Remove the applicable access panel (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):
(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)
remove 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)
remove 640AB
(c) FOR [25QJ1] (SENSOR-UNDERFULL, L WNG TK INR 2 CHANNEL B)
remove 540CB
(d) FOR [25QJ2] (SENSOR-UNDERFULL, R WNG TK INR 2 CHANNEL B)
remove 640CB
(e) FOR [17QJ1] (SENSOR-HI LEVEL, LEFT WING TANK INNER CHANEL A), [26QJ1] (SENSOR-UNDERFULL, L WNG TK INR 3 CHANNEL B)
remove 540GB
(f) FOR [17QJ2] (SENSOR-HI LEVEL, RIGHT WING TANK INNER CHANEL A), [26QJ2] (SENSOR-UNDERFULL, R WNG TK INR 3 CHANNEL B)
remove 640GB
(g) FOR [27QJ1] (SENSOR-FULL LVL, L WNG TK INR 2 CHANNEL B)
remove 540JB
(h) FOR [27QJ2] (SENSOR-FULL LVL, R WNG TK INR 2 CHANNEL B)
remove 640JB.

Subtask 28-46-15-010-050-D ** ON A/C NOT FOR ALL

D. Get Access
(1) Put the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE in position below the applicable access panel 540AB, 540EB, 540LB, 540NB, 540PB (640AB, 640EB, 640LB, 640NB, 640PB).
(2) Remove the applicable access panel (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):
(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)
remove 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)
remove 640AB
(c) FOR [25QJ1] (SENSOR-UNDERFULL, L WNG TK INR 2 CHANNEL B)
remove 540EB
(d) FOR [25QJ2] (SENSOR-UNDERFULL, R WNG TK INR 2 CHANNEL B)
remove 640EB
(e) FOR [26QJ1] (SENSOR-UNDERFULL, L WNG TK INR 3 CHANNEL B)
remove 540LB
(f) FOR [26QJ2] (SENSOR-UNDERFULL, R WNG TK INR 3 CHANNEL B)
remove 640LB
(g) FOR [17QJ1] (SENSOR-HI LEVEL, LEFT WING TANK INNER CHANEL A)
remove 540NB
(h) FOR [17QJ2] (SENSOR-HI LEVEL, RIGHT WING TANK INNER CHANEL A)
remove 640NB
(i) FOR [27QJ1] (SENSOR-FULL LVL, L WNG TK INR 2 CHANNEL B)
remove 540PB
(j) FOR [27QJ2] (SENSOR-FULL LVL, R WNG TK INR 2 CHANNEL B)
remove 640PB.

4. Procedure
Subtask 28-46-15-020-050-A

A. Removal of the Wing-Tank Fuel-Level Sensors
(1) Loosen the cable clamp screw (9) and release the cable (1).
(2) Loosen the electrical connector screws (4) and (5) and remove the cable (1).
(3) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
(4) Remove the bolts (3) and (6), and the washers (2) and (7). Remove the sensor (8).

[Rev.10 from 2021] 2026.04.02 06:18:15 UTC