Installation of the Wing-Tank Fuel-Quantity Probes

TASK 28-42-15-400-001-B
Installation of the Wing-Tank Fuel-Quantity Probes

WARNING: THIS PROCEDURE USES A FUEL SYSTEM ITEM THAT IS IN A CATEGORY KNOWN AS A CRITICAL DESIGN CONFIGURATION CONTROL LIMITATION (CDCCL). CDCCL IDENTIFIES AN ITEM THAT CAN BE THE SOURCE OF A POSSIBLE FUEL TANK IGNITION. YOU MUST KEEP ALL CDCCL ITEMS IN THE APPROVED CONFIGURATION. DAMAGE, WEAR OR CHANGES TO A CDCCL ITEM CAN CAUSE A POSSIBLE FUEL TANK EXPLOSION.

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

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.

ZONE: 540
ZONE: 640
FIN: 21QT1 ** ON A/C NOT FOR ALL
FIN: 21QT2 ** ON A/C NOT FOR ALL
FIN: 23QT1 ** ON A/C NOT FOR ALL
FIN: 23QT2 ** ON A/C NOT FOR ALL
FIN: 25QT1 ** ON A/C NOT FOR ALL
FIN: 25QT2 ** ON A/C NOT FOR ALL
FIN: 26QT1 ** ON A/C NOT FOR ALL
FIN: 26QT2 ** ON A/C NOT FOR ALL
FIN: 27QT1 ** ON A/C NOT FOR ALL
FIN: 27QT2 ** ON A/C NOT FOR ALL
FIN: 28QT1 ** ON A/C NOT FOR ALL
FIN: 28QT2 ** ON A/C NOT FOR ALL
FIN: 29QT1 ** ON A/C NOT FOR ALL
FIN: 29QT2 ** ON A/C NOT FOR ALL
FIN: 30QT1 ** ON A/C NOT FOR ALL
FIN: 30QT2 ** ON A/C NOT FOR ALL
FIN: 31QT1 ** ON A/C NOT FOR ALL
FIN: 31QT2 ** ON A/C NOT FOR ALL
FIN: 32QT1 ** ON A/C NOT FOR ALL
FIN: 32QT2 ** ON A/C NOT FOR ALL
FIN: 34QT1 ** ON A/C NOT FOR ALL
FIN: 34QT2 ** ON A/C NOT FOR ALL
FIN: 56QT1 ** ON A/C NOT FOR ALL
FIN: 56QT2 ** ON A/C NOT FOR ALL
FIN: 92QT1 ** ON A/C NOT FOR ALL
FIN: 92QT2 ** ON A/C NOT FOR ALL
FIN: 93QT1 ** ON A/C NOT FOR ALL
FIN: 93QT2 ** 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 4M (13 FT)
No specific	1	ACCESS PLATFORM 4M (13 FT)-ADJUSTABLE
No specific	AR	SAFETY BARRIER(S)
No specific	Torque wrench: range to between .045 and .023 m.daN (3.98 and 2.04 lbf.in )
No specific	Torque wrench: range to between .124 and .102 m.daN (10.97 and 9.03 lbf.in )
No specific	Torque wrench: range to between .226 and .203 m.daN (20.00 and 17.96 lbf.in )
No specific	Torque wrench: range to between .362 and .316 m.daN (32.04 and 27.96 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.06ABB1)	Polysulfide Sealant-Fuel Tank Fillet -
(Material No.06ABF1)	Polysulfide Sealant-Fuel Tank Quick Curing -
(Material No.08BAA9)	Non Aqueous Cleaner-General - -
(Material No.14SBA1)	Textile-Lint free Cotton -

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
540	FUEL TANK
640	FUEL TANK
540AZ, 540BZ, 640AZ, 640BZ
FOR [21QT1] (PROBE-FUEL QTY NO 1, RIB 1-2 L WNG TK INR GROUP A)
FOR [23QT1] (PROBE-FUEL QTY NO 3, RIB 2-3 L WNG TK INR GROUP A)
FOR [25QT1] (PROBE-FUEL QTY NO 5, RIB 2-3 L WNG TK INR GROUP A)
FOR [26QT1] (PROBE-FUEL QTY NO 6, RIB 3-4 L WNG TK INR GROUP B)
FOR [56QT1] (PROBE-FQI NO 4, RIB 2-3 L WNG TK GROUP B)
FOR [92QT1] (WING TANK PROBE, FQI)
540AB
FOR [21QT2] (PROBE-FUEL QTY NO 1, RIB 1-2 R WNG TK INR GROUP A)
FOR [23QT2] (PROBE-FUEL QTY NO 3, RIB 2-3 R WNG TK INR GROUP A)
FOR [25QT2] (PROBE-FUEL QTY NO 5, RIB 2-3 R WNG TK INR GROUP A)
FOR [26QT2] (PROBE-FUEL QTY NO 6, RIB 3-4 R WNG TK INR GROUP B)
FOR [56QT2] (PROBE-FQI NO 4, RIB 2-3 R WNG TK GROUP B)
FOR [92QT2] (WING TANK PROBE, FQI)
640AB
FOR [27QT1] (PROBE-FUEL QTY NO 7, RIB 6-7 L WNG TK INR GROUP A)
FOR [28QT1] (PROBE-FUEL QTY NO 8, RIB 6-7 L WNG TK INR GROUP B)
540BB
FOR [27QT2] (PROBE-FUEL QTY NO 7, RIB 6-7 R WNG TK INR GROUP A)
FOR [28QT2] (PROBE-FUEL QTY NO 8, RIB 6-7 R WNG TK INR GROUP B)
640BB
FOR [29QT1] (PROBE-FUEL QTY NO 9, RIB 9-10 L WNG TK INR GROUP A)
540DB
FOR [29QT2] (PROBE-FUEL QTY NO 9, RIB 9-10 R WNG TK INR GROUP A)
640DB
FOR [30QT1] (PROBE-FUEL QTY NO 10, RIB 11-12 L WNG TK INR GROUP B)
540FB
FOR [30QT2] (PROBE-FUEL QTY NO 10, RIB 11-12 R WNG TK INR GROUP B)
640FB
FOR [31QT1] (PROBE-FUEL QTY NO 11, RIB 13-14 L WNG TK INR GROUP A)
540GB
FOR [31QT2] (PROBE-FUEL QTY NO 11, RIB 13-14 R WNG TK INR GROUP A)
640GB
FOR [32QT1] (PROBE-FUEL QTY NO 12, RIB 13-14 L WNG TK INR GROUP B)
540HB
FOR [32QT2] (PROBE-FUEL QTY NO 12, RIB 13-14 R WNG TK INR GROUP B)
640HB
FOR [34QT1] (PROBE-FUEL QTY NO 14, RIB 20-21 L WNG TK OUTR GROUP B)
540QB
FOR [34QT2] (PROBE-FUEL QTY NO 14, RIB 20-21 R WNG TK OUTR GROUP B)
640QB
FOR [93QT1] (WING TANK PROBE, FQI)
540LB
FOR [93QT2] (WING TANK PROBE, FQI)
640LB

D. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
1	CABLE-TIES	AIPC 28-42-05-20-010
20	CABLE TIES	AIPC 28-42-05-20-010
45	CABLE TIES	AIPC 28-42-05-20-010
62	CABLE TIES	AIPC 28-42-05-20-010

E. Referenced Information

REFERENCE	DESIGNATION
TASK 12-11-28-650-003-A	Pressure Refuel with Automatic Control
TASK 20-28-00-912-802-A	Electrical Bonding - General Maintenance Procedure
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 28-12-46-000-001-A	Removal of the Overpressure Protector Outlet
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 28-25-00-869-001-A	Fuel Transfer
TASK 28-42-00-740-001-A	Status Report (BITE)
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
TASK 57-27-12-000-002-A	Removal of the Rib 2 Access Panel 540AZ(640AZ) or 540BZ(640BZ)
Wing Tank Probes - Location and Detail
FOR [21QT1] (PROBE-FUEL QTY NO 1, RIB 1-2 L WNG TK INR GROUP A)
FOR [23QT1] (PROBE-FUEL QTY NO 3, RIB 2-3 L WNG TK INR GROUP A)
FOR [25QT1] (PROBE-FUEL QTY NO 5, RIB 2-3 L WNG TK INR GROUP A)
FOR [26QT1] (PROBE-FUEL QTY NO 6, RIB 3-4 L WNG TK INR GROUP B)
FOR [56QT1] (PROBE-FQI NO 4, RIB 2-3 L WNG TK GROUP B)
FOR [92QT1] (WING TANK PROBE, FQI)
TASK 28-10-00-910-002-A	Access to the Fuel Tanks and the Work Areas
TASK 57-27-11-000-001-A	Removal of the Access Panel
TASK 57-27-11-400-001-A	Installation of the Access Panel
FOR [21QT2] (PROBE-FUEL QTY NO 1, RIB 1-2 R WNG TK INR GROUP A)
FOR [23QT2] (PROBE-FUEL QTY NO 3, RIB 2-3 R WNG TK INR GROUP A)
FOR [25QT2] (PROBE-FUEL QTY NO 5, RIB 2-3 R WNG TK INR GROUP A)
FOR [26QT2] (PROBE-FUEL QTY NO 6, RIB 3-4 R WNG TK INR GROUP B)
FOR [56QT2] (PROBE-FQI NO 4, RIB 2-3 R WNG TK GROUP B)
FOR [92QT2] (WING TANK PROBE, FQI)
TASK 28-10-00-910-002-A	Access to the Fuel Tanks and the Work Areas
TASK 57-27-11-000-001-A	Removal of the Access Panel
TASK 57-27-11-400-001-A	Installation of the Access Panel
FOR [27QT1] (PROBE-FUEL QTY NO 7, RIB 6-7 L WNG TK INR GROUP A)
FOR [28QT1] (PROBE-FUEL QTY NO 8, RIB 6-7 L WNG TK INR GROUP B)
TASK 28-10-00-910-002-A	Access to the Fuel Tanks and the Work Areas
TASK 57-27-11-000-001-A	Removal of the Access Panel
TASK 57-27-11-400-001-A	Installation of the Access Panel
FOR [27QT2] (PROBE-FUEL QTY NO 7, RIB 6-7 R WNG TK INR GROUP A)
FOR [28QT2] (PROBE-FUEL QTY NO 8, RIB 6-7 R WNG TK INR GROUP B)
TASK 28-10-00-910-002-A	Access to the Fuel Tanks and the Work Areas
TASK 57-27-11-000-001-A	Removal of the Access Panel
TASK 57-27-11-400-001-A	Installation of the Access Panel
FOR [29QT1] (PROBE-FUEL QTY NO 9, RIB 9-10 L WNG TK INR GROUP A)
TASK 28-10-00-910-002-A	Access to the Fuel Tanks and the Work Areas
TASK 57-27-11-000-001-A	Removal of the Access Panel
TASK 57-27-11-400-001-A	Installation of the Access Panel
FOR [29QT2] (PROBE-FUEL QTY NO 9, RIB 9-10 R WNG TK INR GROUP A)
TASK 28-10-00-910-002-A	Access to the Fuel Tanks and the Work Areas
TASK 57-27-11-000-001-A	Removal of the Access Panel
TASK 57-27-11-400-001-A	Installation of the Access Panel
FOR [30QT1] (PROBE-FUEL QTY NO 10, RIB 11-12 L WNG TK INR GROUP B)
TASK 28-10-00-910-002-A	Access to the Fuel Tanks and the Work Areas
TASK 57-27-11-000-001-A	Removal of the Access Panel
TASK 57-27-11-400-001-A	Installation of the Access Panel
FOR [30QT2] (PROBE-FUEL QTY NO 10, RIB 11-12 R WNG TK INR GROUP B)
TASK 28-10-00-910-002-A	Access to the Fuel Tanks and the Work Areas
TASK 57-27-11-000-001-A	Removal of the Access Panel
TASK 57-27-11-400-001-A	Installation of the Access Panel
FOR [31QT1] (PROBE-FUEL QTY NO 11, RIB 13-14 L WNG TK INR GROUP A)
TASK 28-10-00-910-002-A	Access to the Fuel Tanks and the Work Areas
TASK 57-27-11-000-001-A	Removal of the Access Panel
TASK 57-27-11-400-001-A	Installation of the Access Panel
FOR [31QT2] (PROBE-FUEL QTY NO 11, RIB 13-14 R WNG TK INR GROUP A)
TASK 28-10-00-910-002-A	Access to the Fuel Tanks and the Work Areas
TASK 57-27-11-000-001-A	Removal of the Access Panel
TASK 57-27-11-400-001-A	Installation of the Access Panel
FOR [32QT1] (PROBE-FUEL QTY NO 12, RIB 13-14 L WNG TK INR GROUP B)
TASK 28-10-00-910-002-A	Access to the Fuel Tanks and the Work Areas
TASK 28-12-46-000-001-A	Removal of the Overpressure Protector Outlet
TASK 28-12-46-400-001-A	Installation of the Overpressure Protector Outlet
TASK 57-27-11-000-002-A	Removal of the Access Panel
TASK 57-27-11-400-002-A	Installation of the Access Panel
FOR [32QT2] (PROBE-FUEL QTY NO 12, RIB 13-14 R WNG TK INR GROUP B)
TASK 28-10-00-910-002-A	Access to the Fuel Tanks and the Work Areas
TASK 28-12-46-000-001-A	Removal of the Overpressure Protector Outlet
TASK 28-12-46-400-001-A	Installation of the Overpressure Protector Outlet
TASK 57-27-11-000-002-A	Removal of the Access Panel
TASK 57-27-11-400-002-A	Installation of the Access Panel
FOR [34QT1] (PROBE-FUEL QTY NO 14, RIB 20-21 L WNG TK OUTR GROUP B)
TASK 28-10-00-910-002-A	Access to the Fuel Tanks and the Work Areas
TASK 57-27-11-000-002-A	Removal of the Access Panel
TASK 57-27-11-400-002-A	Installation of the Access Panel
FOR [34QT2] (PROBE-FUEL QTY NO 14, RIB 20-21 R WNG TK OUTR GROUP B)
TASK 28-10-00-910-002-A	Access to the Fuel Tanks and the Work Areas
TASK 57-27-11-000-002-A	Removal of the Access Panel
TASK 57-27-11-400-002-A	Installation of the Access Panel
FOR [93QT1] (WING TANK PROBE, FQI)
TASK 28-10-00-910-002-A	Access to the Fuel Tanks and the Work Areas
TASK 57-27-11-000-002-A	Removal of the Access Panel
TASK 57-27-11-400-002-A	Installation of the Access Panel
FOR [93QT2] (WING TANK PROBE, FQI)
TASK 28-10-00-910-002-A	Access to the Fuel Tanks and the Work Areas
TASK 57-27-11-000-002-A	Removal of the Access Panel
TASK 57-27-11-400-002-A	Installation of the Access Panel

3. Job Set-up
Subtask 28-42-15-941-066-A ** ON A/C NOT FOR ALL

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

Subtask 28-42-15-860-055-A ** 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 remaining fuel has been drained from the applicable fuel tank (Ref. AMM TASK 28-25-00-650-003).

Subtask 28-42-15-865-066-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/FQI/CHAN/2	2QT	M27

Subtask 28-42-15-010-061-A ** ON A/C NOT FOR ALL

D. Get Access
(1) Make sure that the ACCESS PLATFORM 4M (13 FT) is below the applicable access panel.
(2) Make sure that the applicable access panel has been removed (Ref. AMM TASK 28-10-00-910-002), (Ref. AMM TASK 57-27-11-000-001), (Ref. AMM TASK 57-27-11-000-002), (Ref. AMM TASK 28-12-46-000-001):
(a) FOR [21QT1] (PROBE-FUEL QTY NO 1, RIB 1-2 L WNG TK INR GROUP A), [92QT1] (WING TANK PROBE, FQI), [23QT1] (PROBE-FUEL QTY NO 3, RIB 2-3 L WNG TK INR GROUP A), [56QT1] (PROBE-FQI NO 4, RIB 2-3 L WNG TK GROUP B), [25QT1] (PROBE-FUEL QTY NO 5, RIB 2-3 L WNG TK INR GROUP A), [26QT1] (PROBE-FUEL QTY NO 6, RIB 3-4 L WNG TK INR GROUP B)
remove 540AB.
(b) FOR [27QT1] (PROBE-FUEL QTY NO 7, RIB 6-7 L WNG TK INR GROUP A), [28QT1] (PROBE-FUEL QTY NO 8, RIB 6-7 L WNG TK INR GROUP B)
remove 540BB.
(c) FOR [29QT1] (PROBE-FUEL QTY NO 9, RIB 9-10 L WNG TK INR GROUP A)
remove 540DB.
(d) FOR [30QT1] (PROBE-FUEL QTY NO 10, RIB 11-12 L WNG TK INR GROUP B)
remove 540FB.
(e) FOR [31QT1] (PROBE-FUEL QTY NO 11, RIB 13-14 L WNG TK INR GROUP A)
remove 540GB.
(f) FOR [32QT1] (PROBE-FUEL QTY NO 12, RIB 13-14 L WNG TK INR GROUP B)
remove 540HB.
(g) FOR [93QT1] (WING TANK PROBE, FQI)
remove 540LB.
(h) FOR [34QT1] (PROBE-FUEL QTY NO 14, RIB 20-21 L WNG TK OUTR GROUP B)
remove 540QB.
(i) FOR [21QT2] (PROBE-FUEL QTY NO 1, RIB 1-2 R WNG TK INR GROUP A), [92QT2] (WING TANK PROBE, FQI), [23QT2] (PROBE-FUEL QTY NO 3, RIB 2-3 R WNG TK INR GROUP A), [56QT2] (PROBE-FQI NO 4, RIB 2-3 R WNG TK GROUP B), [25QT2] (PROBE-FUEL QTY NO 5, RIB 2-3 R WNG TK INR GROUP A), [26QT2] (PROBE-FUEL QTY NO 6, RIB 3-4 R WNG TK INR GROUP B)
remove 640AB.
(j) FOR [27QT2] (PROBE-FUEL QTY NO 7, RIB 6-7 R WNG TK INR GROUP A), [28QT2] (PROBE-FUEL QTY NO 8, RIB 6-7 R WNG TK INR GROUP B)
remove 640BB.
(k) FOR [29QT2] (PROBE-FUEL QTY NO 9, RIB 9-10 R WNG TK INR GROUP A)
remove 640DB.
(l) FOR [30QT2] (PROBE-FUEL QTY NO 10, RIB 11-12 R WNG TK INR GROUP B)
remove 640FB.
(m) FOR [31QT2] (PROBE-FUEL QTY NO 11, RIB 13-14 R WNG TK INR GROUP A)
remove 640GB.
(n) FOR [32QT2] (PROBE-FUEL QTY NO 12, RIB 13-14 R WNG TK INR GROUP B)
remove 640HB.
(o) FOR [93QT2] (WING TANK PROBE, FQI)
remove 640LB.
(p) FOR [34QT2] (PROBE-FUEL QTY NO 14, RIB 20-21 R WNG TK OUTR GROUP B)
remove 640QB.
(3) Make sure that the spring-loaded surge door 540AZ (640AZ) is open and safetied with the 98D57004013000 HOOK-COVER (RIB 2 SURGE DOORS).
(4) Make sure that the spring-loaded surge door 540BZ (640BZ) is open and safetied with the 98D57004014000 HOOK-COVER (RIB2-SURGE DOORS).

Subtask 28-42-15-010-061-B ** ON A/C NOT FOR ALL

D. Get Access
(1) Make sure that the ACCESS PLATFORM 4M (13 FT)-ADJUSTABLE is in position below the applicable zone 540 (640).
(2) Make sure that the applicable access panels are removed that follow:
(a) FOR [21QT1] (PROBE-FUEL QTY NO 1, RIB 1-2 L WNG TK INR GROUP A), [92QT1] (WING TANK PROBE, FQI), [23QT1] (PROBE-FUEL QTY NO 3, RIB 2-3 L WNG TK INR GROUP A), [56QT1] (PROBE-FQI NO 4, RIB 2-3 L WNG TK GROUP B), [25QT1] (PROBE-FUEL QTY NO 5, RIB 2-3 L WNG TK INR GROUP A), [26QT1] (PROBE-FUEL QTY NO 6, RIB 3-4 L WNG TK INR GROUP B)
Remove 540AB (Ref. AMM TASK 28-10-00-910-002) and (Ref. AMM TASK 57-27-11-000-001).
(b) FOR [27QT1] (PROBE-FUEL QTY NO 7, RIB 6-7 L WNG TK INR GROUP A), [28QT1] (PROBE-FUEL QTY NO 8, RIB 6-7 L WNG TK INR GROUP B)
Remove 540BB (Ref. AMM TASK 28-10-00-910-002) and (Ref. AMM TASK 57-27-11-000-001).
(c) FOR [29QT1] (PROBE-FUEL QTY NO 9, RIB 9-10 L WNG TK INR GROUP A)
Remove 540DB (Ref. AMM TASK 28-10-00-910-002) and (Ref. AMM TASK 57-27-11-000-001).
(d) FOR [30QT1] (PROBE-FUEL QTY NO 10, RIB 11-12 L WNG TK INR GROUP B)
Remove 540FB (Ref. AMM TASK 28-10-00-910-002) and (Ref. AMM TASK 57-27-11-000-001).
(e) FOR [31QT1] (PROBE-FUEL QTY NO 11, RIB 13-14 L WNG TK INR GROUP A)
Remove 540GB (Ref. AMM TASK 28-10-00-910-002) and (Ref. AMM TASK 57-27-11-000-001).
(f) FOR [32QT1] (PROBE-FUEL QTY NO 12, RIB 13-14 L WNG TK INR GROUP B)
Remove 540HB (Ref. AMM TASK 28-10-00-910-002), (Ref. AMM TASK 57-27-11-000-002) and (Ref. AMM TASK 28-12-46-000-001).
(g) FOR [93QT1] (WING TANK PROBE, FQI)
Remove 540LB (Ref. AMM TASK 28-10-00-910-002) and (Ref. AMM TASK 57-27-11-000-002).
(h) FOR [34QT1] (PROBE-FUEL QTY NO 14, RIB 20-21 L WNG TK OUTR GROUP B)
Remove 540QB (Ref. AMM TASK 28-10-00-910-002) and (Ref. AMM TASK 57-27-11-000-002).
(i) FOR [21QT2] (PROBE-FUEL QTY NO 1, RIB 1-2 R WNG TK INR GROUP A), [92QT2] (WING TANK PROBE, FQI), [23QT2] (PROBE-FUEL QTY NO 3, RIB 2-3 R WNG TK INR GROUP A), [56QT2] (PROBE-FQI NO 4, RIB 2-3 R WNG TK GROUP B), [25QT2] (PROBE-FUEL QTY NO 5, RIB 2-3 R WNG TK INR GROUP A), [26QT2] (PROBE-FUEL QTY NO 6, RIB 3-4 R WNG TK INR GROUP B)
Remove 640AB (Ref. AMM TASK 28-10-00-910-002) and (Ref. AMM TASK 57-27-11-000-001).
(j) FOR [27QT2] (PROBE-FUEL QTY NO 7, RIB 6-7 R WNG TK INR GROUP A), [28QT2] (PROBE-FUEL QTY NO 8, RIB 6-7 R WNG TK INR GROUP B)
Remove 640BB (Ref. AMM TASK 28-10-00-910-002) and (Ref. AMM TASK 57-27-11-000-001).
(k) FOR [29QT2] (PROBE-FUEL QTY NO 9, RIB 9-10 R WNG TK INR GROUP A)
Remove 640DB (Ref. AMM TASK 28-10-00-910-002) and (Ref. AMM TASK 57-27-11-000-001).
(l) FOR [30QT2] (PROBE-FUEL QTY NO 10, RIB 11-12 R WNG TK INR GROUP B)
Remove 640FB (Ref. AMM TASK 28-10-00-910-002) and (Ref. AMM TASK 57-27-11-000-001).
(m) FOR [31QT2] (PROBE-FUEL QTY NO 11, RIB 13-14 R WNG TK INR GROUP A)
Remove 640GB (Ref. AMM TASK 28-10-00-910-002) and (Ref. AMM TASK 57-27-11-000-001).
(n) FOR [32QT2] (PROBE-FUEL QTY NO 12, RIB 13-14 R WNG TK INR GROUP B)
Remove 640HB (Ref. AMM TASK 28-10-00-910-002), (Ref. AMM TASK 57-27-11-000-002) and (Ref. AMM TASK 28-12-46-000-001).
(o) FOR [93QT2] (WING TANK PROBE, FQI)
Remove 640LB (Ref. AMM TASK 28-10-00-910-002) and (Ref. AMM TASK 57-27-11-000-002).
(p) FOR [34QT2] (PROBE-FUEL QTY NO 14, RIB 20-21 R WNG TK OUTR GROUP B)
Remove 640QB (Ref. AMM TASK 28-10-00-910-002) and (Ref. AMM TASK 57-27-11-000-002).
(3) Make sure that the applicable RIB2 access panels are removed that follow:
(a) For the left wing, remove 540AZ and 540BZ (Ref. AMM TASK 57-27-12-000-002).
(b) For the right wing, remove 640AZ and 640BZ (Ref. AMM TASK 57-27-12-000-002).

4. Procedure
Subtask 28-42-15-420-061-A ** ON A/C NOT FOR ALL

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

Subtask 28-42-15-420-062-A ** ON A/C NOT FOR ALL

B. Installation of the Fuel-Quantity-Probe

CAUTION: REFER TO THE MATCH MARKS MADE DURING THE REMOVAL WHEN YOU CONNECT THE ELECTRICAL WIRES. INCORRECT CONNECTION OF THE WIRES WILL CAUSE DAMAGE TO EQUIPMENT.

(1) Installation of the probe 21QT1(2):
(a) Install the bracket (13) on the probe (11).
(b) Put the probe (11) in the correct position and loosely install the bolts (12), the bolts (10) and the washers (9).

WARNING: THIS INSTRUCTION IS APPLICABLE TO A CRITICAL DESIGN CONFIGURATION CONTROL LIMITATION (CDCCL) ITEM. CAREFULLY OBEY ALL GIVEN INSTRUCTIONS WHEN YOU DO THIS STEP. IF YOU DO NOT OBEY THESE INSTRUCTIONS, A DANGEROUS CONDITION CAN OCCUR THAT CAN CAUSE A POSSIBLE FUEL TANK EXPLOSION.

(c) Measure the clearance between the structure and the top and bottom of the probe (11).
1 Make sure that the clearance is a minimum of 10.0 mm (0.3937 in.).
2 To prevent possible static discharge, make sure that the fuel probe is not less than 6.0 mm (0.2362 in.) from:

The nearest structure
Rib and tank wall
Pipework
Brackets and p-clips
Fasteners and other metal parts.

(d) TORQUE the bolts (10) to between .56 and .45 m.daN (49.56 and 39.82 lbf.in )

(Ref. AMM TASK 20-28-00-912-802).
(e) Tighten the bolts (12) (Ref. AMM TASK 20-28-00-912-802).
(f) Apply Polysulfide Sealant-Fuel Tank Fillet - (Material No.06ABB1) or Polysulfide Sealant-Fuel Tank Quick Curing - (Material No.06ABF1) to the ends of the bolts (10) and (12).
(g) Remove the blanking caps from the electrical connectors.
(h) Identify and connect the electrical connectors of the cable (8) with the screws (3), (4) and (5).
(i) TORQUE the screws (3), (4) and (5) as follows:

The screw (3) to between .124 and .102 m.daN (10.97 and 9.03 lbf.in )
The screw (4) to between .226 and .203 m.daN (20.00 and 17.96 lbf.in )
The screw (5) to between .362 and .316 m.daN (32.04 and 27.96 lbf.in ) .

(j) Put the cable (8) in position under the clamp block (6) and TORQUE the clamp screw (7) to between .045 and .023 m.daN (3.98 and 2.04 lbf.in )

.
(k) Install the AIPC 28-42-05-20-010 CABLE-TIES (1), as necessary, to attach the cable (8) to the probe (11).
(2) Installation of the probe 92QT1(2):

CAUTION: REFER TO THE MATCH MARKS MADE DURING THE REMOVAL WHEN YOU CONNECT THE ELECTRICAL WIRES. INCORRECT CONNECTION OF THE WIRES WILL CAUSE DAMAGE TO EQUIPMENT.

(a) Install the bracket (37) on the probe (35).
(b) Put the probe (35) in the correct position and loosely install the bolts (36) and the nuts (38).
(c) Loosely install the bolts (33) and the washers (32).

(d) Measure the clearance between the structure and the top and bottom of the probe (35).
1 Make sure that the clearance is a minimum of 10.0 mm (0.3937 in.).
2 To prevent possible static discharge, make sure that the fuel probe is not less than 6.0 mm (0.2362 in.) from:

The nearest structure
Rib and tank wall
Pipework
Brackets and p-clips
Fasteners and other metal parts.

(e) TORQUE the bolts (33) to between .56 and .45 m.daN (49.56 and 39.82 lbf.in )

(Ref. AMM TASK 20-28-00-912-802).
(f) Tighten the bolts (36) and the nuts (38) (Ref. AMM TASK 20-28-00-912-802).
(g) Apply Polysulfide Sealant-Fuel Tank Fillet - (Material No.06ABB1) or Polysulfide Sealant-Fuel Tank Quick Curing - (Material No.06ABF1) to the ends of the bolts (33) and (36).
(h) Remove the blanking caps from the electrical connectors.
(i) Identify and connect the electrical connectors of the cable (27) to the temperature sensor (31) with the screws (30) and (34).
(j) TORQUE the screws (30) to between .124 and .102 m.daN (10.97 and 9.03 lbf.in )

.
(k) TORQUE the screws (34) to between .226 and .203 m.daN (20.00 and 17.96 lbf.in )

.
(l) Put the cable (27) in position under the clamp block (28).
(m) TORQUE the clamp screw (29) to between .045 and .023 m.daN (3.98 and 2.04 lbf.in )

.
(n) Identify and connect the electrical connectors of the cable (27) with the screws (22), (23) and (24).
(o) TORQUE the screws (22), (23) and (24) as follows:

The screw (22) to between .124 and .102 m.daN (10.97 and 9.03 lbf.in )
The screw (23) to between .226 and .203 m.daN (20.00 and 17.96 lbf.in )
The screw (24) to between .362 and .316 m.daN (32.04 and 27.96 lbf.in ) .

(p) Put the cable (27) in position under the clamp block (25) and TORQUE the clamp screw (26) to between .045 and .023 m.daN (3.98 and 2.04 lbf.in )

.
(q) Install the AIPC 28-42-05-20-010 CABLE TIES (20), as necessary, to attach the cable (27) to the probe (35).
(3) Installation of the probe 23QT1(2), 56QT1(2), 25QT1(2), 26QT1(2), 27QT1(2), 28QT1(2), 29QT1(2), 30QT1(2), 31QT1(2), 32QT1(2), 34QT1(2):

CAUTION: REFER TO THE MATCH MARKS MADE DURING THE REMOVAL WHEN YOU CONNECT THE ELECTRICAL WIRES. INCORRECT CONNECTION OF THE WIRES WILL CAUSE DAMAGE TO EQUIPMENT.

(a) Put the probe (55) in the correct position and loosely install the bolts (46) and the washers (47).

(b) Measure the clearance between the structure and the top and bottom of the probe (55).
1 Make sure that the clearance is a minimum of 10.0 mm (0.3937 in.).
2 To prevent possible static discharge, make sure that the fuel probe is not less than 6.0 mm (0.2362 in.) from:

The nearest structure
Rib and tank wall
Pipework
Brackets and p-clips
Fasteners and other metal parts.

(Ref. AMM TASK 20-28-00-912-802).
(d) Apply Polysulfide Sealant-Fuel Tank Fillet - (Material No.06ABB1) or Polysulfide Sealant-Fuel Tank Quick Curing - (Material No.06ABF1) to the ends of the bolt (46).
(e) Remove the blanking caps from the electrical connectors.
(f) Identify and connect the electrical connectors of the cable (54) with the screws (49), (50) and (51).
(g) TORQUE the screws (49), (50) and (51) as follows:

The screw (49) to between .124 and .102 m.daN (10.97 and 9.03 lbf.in )
The screw (50) to between .226 and .203 m.daN (20.00 and 17.96 lbf.in )
The screw (51) to between .362 and .316 m.daN (32.04 and 27.96 lbf.in ) .

(h) Put the cable (54) in position under the clamp block (52) and TORQUE the clamp screw (53) to between .045 and .023 m.daN (3.98 and 2.04 lbf.in )

.
(i) Install the AIPC 28-42-05-20-010 CABLE TIES (45), as necessary, to attach the cable (54) to the probe (55).
(4) Installation of the probe 93QT1(2):

CAUTION: REFER TO THE MATCH MARKS MADE DURING THE REMOVAL WHEN YOU CONNECT THE ELECTRICAL WIRES. INCORRECT CONNECTION OF THE WIRES WILL CAUSE DAMAGE TO EQUIPMENT.

(a) Put the probe (77) in the correct position and loosely install the bolts (60), (72) and the washers (61), (73).

(b) Measure the clearance between the structure and the top and bottom of the probe (77).
1 Make sure that the clearance is a minimum of 10.0 mm (0.3937 in.).
2 To prevent possible static discharge, make sure that the fuel probe is not less than 6.0 mm (0.2362 in.) from:

The nearest structure
Rib and tank wall
Pipework
Brackets and p-clips
Fasteners and other metal parts.

(Ref. AMM TASK 20-28-00-912-802).
(d) Apply Polysulfide Sealant-Fuel Tank Fillet - (Material No.06ABB1) or Polysulfide Sealant-Fuel Tank Quick Curing - (Material No.06ABF1) to the ends of the bolts (60) and (72).
(e) Remove the blanking caps from the electrical connectors.
(f) Identify and connect the electrical connectors of the cable (69) to the temperature sensor (75) with the screws (74) and (76).
(g) TORQUE the screw (74) to between .124 and .102 m.daN (10.97 and 9.03 lbf.in )

.
(h) TORQUE the screw (76) to between .226 and .203 m.daN (20.00 and 17.96 lbf.in )

.
(i) Put the cable (69) in position under the clamp block (70).
(j) TORQUE the clamp screw (71) to between .045 and .023 m.daN (3.98 and 2.04 lbf.in )

.
(k) Identify and connect the electrical connectors of the cable (69) with the screws (64), (65) and (66).
(l) TORQUE the screws (64), (65) and (66) as follows:

The screw (64) to between .124 and .102 m.daN (10.97 and 9.03 lbf.in )
The screw (65) to between .226 and .203 m.daN (20.00 and 17.96 lbf.in )
The screw (66) to between .362 and .316 m.daN (32.04 and 27.96 lbf.in ) .

(m) Put the cable (69) in position under the clamp block (67) and TORQUE the clamp screw (68) to between .045 and .023 m.daN (3.98 and 2.04 lbf.in )

.
(n) Install the AIPC 28-42-05-20-010 CABLE TIES (62), as necessary, to attach the cable (69) to the probe (77).

5. Close-up
Subtask 28-42-15-410-057-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) Make sure that all of the bonding straps are correctly installed and attached (Ref. AMM TASK 20-28-00-912-802), before you install the fuel-tank access panels.
(3) Remove the 98D57004013000 HOOK-COVER (RIB 2 SURGE DOORS) and carefully close the spring-loaded surge door 540AZ (640AZ).
(4) Remove the 98D57004014000 HOOK-COVER (RIB2-SURGE DOORS) and carefully close the spring-loaded surge door 540BZ (640BZ).
(5) Install the applicable access panels (Ref. AMM TASK 57-27-11-400-001) or (Ref. AMM TASK 57-27-11-400-002):
(a) FOR [21QT1] (PROBE-FUEL QTY NO 1, RIB 1-2 L WNG TK INR GROUP A), [92QT1] (WING TANK PROBE, FQI), [23QT1] (PROBE-FUEL QTY NO 3, RIB 2-3 L WNG TK INR GROUP A), [56QT1] (PROBE-FQI NO 4, RIB 2-3 L WNG TK GROUP B), [25QT1] (PROBE-FUEL QTY NO 5, RIB 2-3 L WNG TK INR GROUP A), [26QT1] (PROBE-FUEL QTY NO 6, RIB 3-4 L WNG TK INR GROUP B)
install 540AB.
(b) FOR [27QT1] (PROBE-FUEL QTY NO 7, RIB 6-7 L WNG TK INR GROUP A), [28QT1] (PROBE-FUEL QTY NO 8, RIB 6-7 L WNG TK INR GROUP B)
install 540BB.
(c) FOR [29QT1] (PROBE-FUEL QTY NO 9, RIB 9-10 L WNG TK INR GROUP A)
install 540DB.
(d) FOR [30QT1] (PROBE-FUEL QTY NO 10, RIB 11-12 L WNG TK INR GROUP B)
install 540FB.
(e) FOR [31QT1] (PROBE-FUEL QTY NO 11, RIB 13-14 L WNG TK INR GROUP A)
install 540GB.
(f) FOR [32QT1] (PROBE-FUEL QTY NO 12, RIB 13-14 L WNG TK INR GROUP B)
install 540HB.
(g) FOR [93QT1] (WING TANK PROBE, FQI)
install 540LB.
(h) FOR [34QT1] (PROBE-FUEL QTY NO 14, RIB 20-21 L WNG TK OUTR GROUP B)
install 540QB.
(i) FOR [21QT2] (PROBE-FUEL QTY NO 1, RIB 1-2 R WNG TK INR GROUP A), [92QT2] (WING TANK PROBE, FQI), [23QT2] (PROBE-FUEL QTY NO 3, RIB 2-3 R WNG TK INR GROUP A), [56QT2] (PROBE-FQI NO 4, RIB 2-3 R WNG TK GROUP B), [25QT2] (PROBE-FUEL QTY NO 5, RIB 2-3 R WNG TK INR GROUP A), [26QT2] (PROBE-FUEL QTY NO 6, RIB 3-4 R WNG TK INR GROUP B)
install 640AB.
(j) FOR [27QT2] (PROBE-FUEL QTY NO 7, RIB 6-7 R WNG TK INR GROUP A), [28QT2] (PROBE-FUEL QTY NO 8, RIB 6-7 R WNG TK INR GROUP B)
install 640BB.
(k) FOR [29QT2] (PROBE-FUEL QTY NO 9, RIB 9-10 R WNG TK INR GROUP A)
install 640DB.
(l) FOR [30QT2] (PROBE-FUEL QTY NO 10, RIB 11-12 R WNG TK INR GROUP B)
install 640FB.
(m) FOR [31QT2] (PROBE-FUEL QTY NO 11, RIB 13-14 R WNG TK INR GROUP A)
install 640GB.
(n) FOR [32QT2] (PROBE-FUEL QTY NO 12, RIB 13-14 R WNG TK INR GROUP B)
install 640HB.
(o) FOR [93QT2] (WING TANK PROBE, FQI)
install 640LB.
(p) FOR [34QT2] (PROBE-FUEL QTY NO 14, RIB 20-21 R WNG TK OUTR GROUP B)
install 640QB.

Subtask 28-42-15-410-057-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) Make sure that all of the bonding straps are correctly installed and attached (Ref. AMM TASK 20-28-00-912-802), before you install the fuel-tank access panels.
(3) Install the applicable RIB2 access panels that follow:
(a) For the left wing, install 540AZ and 540BZ (Ref. AMM TASK 57-27-12-000-002).
(b) For the right wing, install 640AZ and 640BZ (Ref. AMM TASK 57-27-12-000-002).
(4) Install the applicable access panels that follow:
(a) FOR [21QT1] (PROBE-FUEL QTY NO 1, RIB 1-2 L WNG TK INR GROUP A), [92QT1] (WING TANK PROBE, FQI), [23QT1] (PROBE-FUEL QTY NO 3, RIB 2-3 L WNG TK INR GROUP A), [56QT1] (PROBE-FQI NO 4, RIB 2-3 L WNG TK GROUP B), [25QT1] (PROBE-FUEL QTY NO 5, RIB 2-3 L WNG TK INR GROUP A), [26QT1] (PROBE-FUEL QTY NO 6, RIB 3-4 L WNG TK INR GROUP B)
Install 540AB (Ref. AMM TASK 57-27-11-400-001).
(b) FOR [27QT1] (PROBE-FUEL QTY NO 7, RIB 6-7 L WNG TK INR GROUP A), [28QT1] (PROBE-FUEL QTY NO 8, RIB 6-7 L WNG TK INR GROUP B)
Install 540BB (Ref. AMM TASK 57-27-11-400-001).
(c) FOR [29QT1] (PROBE-FUEL QTY NO 9, RIB 9-10 L WNG TK INR GROUP A)
Install 540DB (Ref. AMM TASK 57-27-11-400-001).
(d) FOR [30QT1] (PROBE-FUEL QTY NO 10, RIB 11-12 L WNG TK INR GROUP B)
Install 540FB (Ref. AMM TASK 57-27-11-400-001).
(e) FOR [31QT1] (PROBE-FUEL QTY NO 11, RIB 13-14 L WNG TK INR GROUP A)
Install 540GB (Ref. AMM TASK 57-27-11-400-001).
(f) FOR [32QT1] (PROBE-FUEL QTY NO 12, RIB 13-14 L WNG TK INR GROUP B)
Install 540HB (Ref. AMM TASK 57-27-11-400-002) and (Ref. AMM TASK 28-12-46-400-001).
(g) FOR [93QT1] (WING TANK PROBE, FQI)
Install 540LB (Ref. AMM TASK 57-27-11-400-002).
(h) FOR [34QT1] (PROBE-FUEL QTY NO 14, RIB 20-21 L WNG TK OUTR GROUP B)
Install 540QB (Ref. AMM TASK 57-27-11-400-002).
(i) FOR [21QT2] (PROBE-FUEL QTY NO 1, RIB 1-2 R WNG TK INR GROUP A), [92QT2] (WING TANK PROBE, FQI), [23QT2] (PROBE-FUEL QTY NO 3, RIB 2-3 R WNG TK INR GROUP A), [56QT2] (PROBE-FQI NO 4, RIB 2-3 R WNG TK GROUP B), [25QT2] (PROBE-FUEL QTY NO 5, RIB 2-3 R WNG TK INR GROUP A), [26QT2] (PROBE-FUEL QTY NO 6, RIB 3-4 R WNG TK INR GROUP B)
Install 640AB (Ref. AMM TASK 57-27-11-400-001).
(j) FOR [27QT2] (PROBE-FUEL QTY NO 7, RIB 6-7 R WNG TK INR GROUP A), [28QT2] (PROBE-FUEL QTY NO 8, RIB 6-7 R WNG TK INR GROUP B)
Install 640BB (Ref. AMM TASK 57-27-11-400-001).
(k) FOR [29QT2] (PROBE-FUEL QTY NO 9, RIB 9-10 R WNG TK INR GROUP A)
Install 640DB (Ref. AMM TASK 57-27-11-400-001).
(l) FOR [30QT2] (PROBE-FUEL QTY NO 10, RIB 11-12 R WNG TK INR GROUP B)
Install 640FB (Ref. AMM TASK 57-27-11-400-001).
(m) FOR [31QT2] (PROBE-FUEL QTY NO 11, RIB 13-14 R WNG TK INR GROUP A)
Install 640GB (Ref. AMM TASK 57-27-11-400-001).
(n) FOR [32QT2] (PROBE-FUEL QTY NO 12, RIB 13-14 R WNG TK INR GROUP B)
Install 640HB (Ref. AMM TASK 57-27-11-400-002) and (Ref. AMM TASK 28-12-46-400-001).
(o) FOR [93QT2] (WING TANK PROBE, FQI)
Install 640LB (Ref. AMM TASK 57-27-11-400-002).
(p) FOR [34QT2] (PROBE-FUEL QTY NO 14, RIB 20-21 R WNG TK OUTR GROUP B)
Install 640QB (Ref. AMM TASK 57-27-11-400-002).

Subtask 28-42-15-865-067-A ** ON A/C NOT FOR ALL

B. 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 28-42-15-740-055-A ** ON A/C NOT FOR ALL

C. Test
(1) Do a status report (BITE) of the FQI system (Ref. AMM TASK 28-42-00-740-001).

Subtask 28-42-15-650-058-A ** ON A/C NOT FOR ALL

D. 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 28-42-15-942-055-A ** ON A/C NOT FOR ALL

E. 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 06:18:06 UTC