Installation of the Wing Tank Harness

TASK 28-42-43-400-005-A
Installation of the Wing Tank Harness

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: 57QT ** ON A/C NOT FOR ALL
FIN: 58QT ** ON A/C NOT FOR ALL
FIN: 63QT ** ON A/C NOT FOR ALL
FIN: 64QT ** 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	1	ACCESS PLATFORM 5M (16 FT)- ADJUSTABLE
No specific	AR	CRIMPING TOOL 46447
No specific	AR	SAFETY BARRIER(S)
No specific	AR	SPATULA - PLASTIC
No specific	AR	TAPE - ADHESIVE
No specific	Torque wrench: range to between 0.40 and 0.30 m.daN (35.40 and 26.55 lbf.in )
No specific	Torque wrench: range to between 1.27 and 1.16 m.daN (112.39 and 102.65 lbf.in )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.05BAA1)	Threadlocking Adhesive-- Low strength -
(Material No.06ABA1)	Polysulfide Sealant-Fuel Tank Brushable -
(Material No.08BAA9)	Non Aqueous Cleaner-General - -
(Material No.12ACB1)	Corrosion Preventive Compound-Heavy Duty Hard Film -
(Material No.14QFB1)	Wire-Locking Dia: 0.8 mm CRES Nickel Alloy -
(Material No.14SBA1)	Textile-Lint free Cotton -

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
540	FUEL TANK
640	FUEL TANK
540BB, 574BB, 640BB, 674BB
FOR [57QT] (HARNESS-LEFT WING TANK A)
540AB, 540AZ, 540BB, 540BZ, 540DB, 540HB, 540NB
FOR [58QT] (HARNESS-RIGHT WING, TANK A)
640AB, 640AZ, 640BB, 640BZ, 640DB, 640HB, 640NB
FOR [63QT] (HARNESS-LEFT WING TANK B)
540AB, 540BB, 540BZ, 540EB, 540FB, 540LB, 540MB, 540PB, 540QB
FOR [64QT] (HARNESS-RIGHT WING TANK B)
640AB, 640BB, 640BZ, 640EB, 640FB, 640LB, 640MB, 640PB, 640QB

D. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
1	CABLE-TIES	AIPC 28-42-05-55-010
1	CABLE-TIES	AIPC 28-42-05-56-010
4	O-RING	AIPC 28-42-43-02-025
8	O-RING	AIPC 28-42-43-02-025
1	CABLE-TIES	AIPC 28-42-85-55-010
1	CABLE-TIES	AIPC 28-42-85-56-010

E. 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 28-42-00-740-001-A	Status Report (BITE)
TASK 28-42-15-400-005-A	Installation of the Wing-Tank Fuel-Quantity Probes
TASK 28-42-46-400-001-A	Installation of the Dualcomp
TASK 28-42-48-400-001-A	Installation of the Ultracomp
TASK 28-46-00-740-001-A	Functional (BITE) Test
TASK 28-46-15-400-009-A	Installation of the Wing-Tank Fuel-Level Sensors
TASK 28-46-17-400-001-A	Installation of the Temperature Sensor
TASK 28-46-19-400-001-A	Installation of the IDG Shut-off Sensor.
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 57-51-37-000-009-A	Removal of the Access Door
TASK 57-51-37-400-009-A	Installation of the Access Door
ESPM 2048140
ESPM 2048190
Wing Tank Harness 57QT (58QT) and 63QT (64QT) ** ON A/C NOT FOR ALL
Wing Tank Harness RIB 2 to RIB 3 - Detail ** ON A/C NOT FOR ALL
Wing Tank Harness (Group A) - Component Location ** ON A/C NOT FOR ALL
Wing Tank Harness (Group B) - Component Location
Wing Tank Harness RIB 1 to RIB 2 - Detail ** ON A/C NOT FOR ALL
Wing Tank Harness RIB 3 to RIB 4 - Detail ** ON A/C NOT FOR ALL
Wing Tank Harness RIB 5 to RIB 6 - Detail ** ON A/C NOT FOR ALL
Wing Tank Harness RIB 6 to RIB 14 - Detail ** ON A/C NOT FOR ALL
Wing Tank Harness RIB 16 to RIB 17 - Detail ** ON A/C NOT FOR ALL
Wing Tank Harness RIB 18 to RIB 21 - Detail ** ON A/C NOT FOR ALL
Wing Tank Harness RIB 2 to RIB 3 - Detail ** ON A/C NOT FOR ALL
FOR [57QT] (HARNESS-LEFT WING TANK 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 57-27-11-000-002-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)
TASK 57-27-12-400-002-A	Installation of the Rib 2 Access Panel 540AZ (640AZ) or 540BZ (640BZ)
FOR [57QT] (HARNESS-LEFT WING TANK A)
FOR [63QT] (HARNESS-LEFT WING TANK B)
TASK 28-42-48-400-001-A	Installation of the Ultracomp
FOR [58QT] (HARNESS-RIGHT WING, TANK 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 57-27-11-000-002-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)
TASK 57-27-12-400-002-A	Installation of the Rib 2 Access Panel 540AZ (640AZ) or 540BZ (640BZ)
FOR [58QT] (HARNESS-RIGHT WING, TANK A)
FOR [64QT] (HARNESS-RIGHT WING TANK B)
Wing Tank Harness 57QT (58QT) and 63QT (64QT) ** ON A/C NOT FOR ALL
Wing Tank Harness (Group A) - Component Location ** ON A/C NOT FOR ALL
Wing Tank Harness (Group B) - Component Location ** ON A/C NOT FOR ALL
FOR [63QT] (HARNESS-LEFT WING TANK 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 57-27-11-000-002-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)
TASK 57-27-12-400-002-A	Installation of the Rib 2 Access Panel 540AZ (640AZ) or 540BZ (640BZ)
FOR [64QT] (HARNESS-RIGHT WING TANK 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 57-27-11-000-002-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)
TASK 57-27-12-400-002-A	Installation of the Rib 2 Access Panel 540AZ (640AZ) or 540BZ (640BZ)

3. Job Set-up
Subtask 28-42-43-941-063-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 28-42-43-860-051-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 ACCESS PLATFORM 5M (16 FT)- ADJUSTABLE is below the applicable zone:
(a) FOR [57QT] (HARNESS-LEFT WING TANK A), [63QT] (HARNESS-LEFT WING TANK B)
below ZONE 540.
(b) FOR [58QT] (HARNESS-RIGHT WING, TANK A), [64QT] (HARNESS-RIGHT WING TANK B)
below ZONE 640.

Wing Tank Harness 57QT (58QT) and 63QT (64QT) ** ON A/C NOT FOR ALL

(3) Make sure that the applicable access panels have been removed (Ref. AMM TASK 28-10-00-910-002), (Ref. AMM TASK 57-27-11-000-001) and (Ref. AMM TASK 57-27-11-000-002):
(a) FOR [57QT] (HARNESS-LEFT WING TANK A)
Remove 540AB, 540BB, 540DB, 540HB and 540NB.
(b) FOR [58QT] (HARNESS-RIGHT WING, TANK A)
Remove 640AB, 640BB, 640DB, 640HB and 640NB.
(c) FOR [63QT] (HARNESS-LEFT WING TANK B)
Remove 540AB, 540BB, 540EB, 540FB, 540LB, 540MB, 540PB and 540QB.
(d) FOR [64QT] (HARNESS-RIGHT WING TANK B)
Remove 640AB, 640BB, 640EB, 640FB, 640LB, 640MB, 640PB and 640QB.
(4) Open access panel 574BB(674BB).
(5) Make sure that the applicable surge door is open:
(a) FOR [57QT] (HARNESS-LEFT WING TANK A)
Open 540AZ and 540BZ.
(b) FOR [58QT] (HARNESS-RIGHT WING, TANK A)
Open 640AZ and 640BZ.
(c) FOR [63QT] (HARNESS-LEFT WING TANK B)
Open 540BZ.
(d) FOR [64QT] (HARNESS-RIGHT WING TANK B)
Open 640BZ.
(6) Make sure that the 98D57004014000 HOOK-COVER (RIB2-SURGE DOORS) or 98D57004013000 HOOK-COVER (RIB 2 SURGE DOORS) is on the applicable surge door.

Subtask 28-42-43-860-051-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 5M (16 FT)- ADJUSTABLE is below the applicable zone:
(a) FOR [57QT] (HARNESS-LEFT WING TANK A), [63QT] (HARNESS-LEFT WING TANK B)
below ZONE 540.
(b) FOR [58QT] (HARNESS-RIGHT WING, TANK A), [64QT] (HARNESS-RIGHT WING TANK B)
below ZONE 640.

Wing Tank Harness (Group A) - Component Location ** ON A/C NOT FOR ALL

Wing Tank Harness (Group B) - Component Location ** ON A/C NOT FOR ALL

(3) Make sure that the applicable access panels are removed (Ref. AMM TASK 28-10-00-910-002), (Ref. AMM TASK 57-27-11-000-001) and (Ref. AMM TASK 57-27-11-000-002):
(a) FOR [57QT] (HARNESS-LEFT WING TANK A)
Remove 540AB, 540BB, 540DB, 540HB and 540NB.
(b) FOR [58QT] (HARNESS-RIGHT WING, TANK A)
Remove 640AB, 640BB, 640DB, 640HB and 640NB.
(c) FOR [63QT] (HARNESS-LEFT WING TANK B)
Remove 540AB, 540BB, 540EB, 540FB, 540LB, 540MB, 540PB and 540QB.
(d) FOR [64QT] (HARNESS-RIGHT WING TANK B)
Remove 640AB, 640BB, 640EB, 640FB, 640LB, 640MB, 640PB and 640QB.
(4) Open access panel 574BB(674BB).
(5) Make sure that the applicable surge door is open:
(a) FOR [57QT] (HARNESS-LEFT WING TANK A)
Open 540AZ and 540BZ.
(b) FOR [58QT] (HARNESS-RIGHT WING, TANK A)
Open 640AZ and 640BZ.
(c) FOR [63QT] (HARNESS-LEFT WING TANK B)
Open 540BZ.
(d) FOR [64QT] (HARNESS-RIGHT WING TANK B)
Open 640BZ.
(6) Make sure that the 98D57004014000 HOOK-COVER (RIB2-SURGE DOORS) or 98D57004013000 HOOK-COVER (RIB 2 SURGE DOORS) is on the applicable surge door.

Subtask 28-42-43-860-051-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)

Wing Tank Harness 57QT (58QT) and 63QT (64QT) ** ON A/C NOT FOR ALL

(a) FOR [57QT] (HARNESS-LEFT WING TANK A), [63QT] (HARNESS-LEFT WING TANK B)
Below zone 540.
(b) FOR [58QT] (HARNESS-RIGHT WING, TANK A), [64QT] (HARNESS-RIGHT WING TANK B)
Below zone 640.
(3) Make sure that the applicable access panels are removed that follow:
(a) FOR [57QT] (HARNESS-LEFT WING TANK A)
Remove 540AB, 540BB, 540DB, 540HB and 540NB (Ref. AMM TASK 28-10-00-910-002), (Ref. AMM TASK 57-27-11-000-001) and (Ref. AMM TASK 57-27-11-000-002).
(b) FOR [58QT] (HARNESS-RIGHT WING, TANK A)
Remove 640AB, 640BB, 640DB, 640HB and 640NB (Ref. AMM TASK 28-10-00-910-002), (Ref. AMM TASK 57-27-11-000-001) and (Ref. AMM TASK 57-27-11-000-002).
(c) FOR [63QT] (HARNESS-LEFT WING TANK B)
Remove 540AB, 540BB, 540EB, 540FB, 540LB, 540MB, 540PB and 540QB (Ref. AMM TASK 28-10-00-910-002), (Ref. AMM TASK 57-27-11-000-001) and (Ref. AMM TASK 57-27-11-000-002).
(d) FOR [64QT] (HARNESS-RIGHT WING TANK B)
Remove 640AB, 640BB, 640EB, 640FB, 640LB, 640MB, 640PB and 640QB (Ref. AMM TASK 28-10-00-910-002), (Ref. AMM TASK 57-27-11-000-001) and (Ref. AMM TASK 57-27-11-000-002).
(4) Remove the applicable access door 574BB ( 674BB) (Ref. AMM TASK 57-51-37-000-009).
(5) Make sure that the applicable RIB2 access panels are removed that follow:
(a) FOR [57QT] (HARNESS-LEFT WING TANK A)
Remove 540AZ and 540BZ (Ref. AMM TASK 57-27-12-000-002).
(b) FOR [58QT] (HARNESS-RIGHT WING, TANK A)
Remove 640AZ and 640BZ (Ref. AMM TASK 57-27-12-000-002).
(c) FOR [63QT] (HARNESS-LEFT WING TANK B)
Remove 540BZ (Ref. AMM TASK 57-27-12-000-002).
(d) FOR [64QT] (HARNESS-RIGHT WING TANK B)
Remove 640BZ (Ref. AMM TASK 57-27-12-000-002).

Subtask 28-42-43-865-063-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
49VU	FUEL/AFT LOW LVL/& OVFL/WING R	44QJ	A11
** ON A/C NOT FOR ALL
121VU	FUEL/FQI/CHANNEL/1 AND 2	8QT	L26
121VU	FUEL/HI/LVL/SPLY	1QJ	L25
** ON A/C NOT FOR ALL
121VU	FUEL/FQI/CHAN/2	2QT	M27
121VU	FUEL/FWD LOW LVL/WING/R	45QJ	M23
121VU	FUEL/FWD LOW LVL/WING/L	46QJ	M22
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/FQI/CHANNEL/1 AND 2	8QT	L25
121VU	FUEL/HI/LVL/SPLY	1QJ	L24

4. Procedure

WARNING: MAKE SURE THAT ALL CABLES IN FUEL TANKS ARE CORRECTLY SUPPORTED (BY CLIPS AND OTHER SUPPORTS). IF CLIPS OR SUPPORTS ARE MISSING OR DAMAGED, YOU MUST REPLACE THEM.

WARNING: DO NOT REPAIR CABLES THAT ARE IN FUEL TANKS. DO NOT MAKE IN-LINE SPLICES. IF A CABLE IS DEFECTIVE, YOU MUST REPLACE THE FULL CABLE ASSEMBLY.

WARNING: MAKE SURE THAT THE INSTALLATION AND ROUTING OF ALL ELECTRICAL CABLES AGREE WITH THE REQUIREMENTS OF THE ELECTRICAL STANDARD PRACTICES MANUAL.

Subtask 28-42-43-420-098-A ** ON A/C NOT FOR ALL

A. Preparation for Installation

Wing Tank Harness RIB 2 to RIB 3 - Detail ** ON A/C NOT FOR ALL

Wing Tank Harness (Group A) - Component Location ** ON A/C NOT FOR ALL

Wing Tank Harness (Group B) - Component Location ** ON A/C NOT FOR ALL

Wing Tank Harness RIB 1 to RIB 2 - Detail ** ON A/C NOT FOR ALL

Wing Tank Harness RIB 3 to RIB 4 - Detail ** ON A/C NOT FOR ALL

Wing Tank Harness RIB 5 to RIB 6 - Detail ** ON A/C NOT FOR ALL

Wing Tank Harness RIB 6 to RIB 14 - Detail ** ON A/C NOT FOR ALL

Wing Tank Harness RIB 16 to RIB 17 - Detail ** ON A/C NOT FOR ALL

Wing Tank Harness RIB 18 to RIB 21 - Detail ** ON A/C NOT FOR ALL

Wing Tank Harness RIB 2 to RIB 3 - Detail ** ON A/C NOT FOR ALL

WARNING: WHEN YOU USE COMPRESSED AIR:

USE THE CORRECT PROTECTION (FACE SHIELD OR GOGGLES)
DO NOT POINT THE AIRFLOW AT YOURSELF OR OTHER PERSONS.

LOOSE PARTICLES AND/OR HIGH PRESSURE AIR CAN CAUSE INJURY.

WARNING: DO NOT LET COMPRESSED GAS TOUCH YOUR SKIN. THE GAS CAN GO THROUGH THE SKIN AND MAKE BUBBLES IN THE BLOOD. THIS CONDITION CAN KILL YOU.

(1) Use a SPATULA - PLASTIC to remove the sealant at the interface of the electrical backshell (8) and the rear spar.
(2) Use a Textile-Lint free Cotton - (Material No.14SBA1) made moist with Non Aqueous Cleaner-General - - (Material No.08BAA9) to clean:

the electrical backshell (8)
the interface of the electrical backshell (8) and the rear spar.

(3) Dry the cleaned areas with compressed air.
(4) Make sure that the parts retained from the removed component are clean and in the correct condition.

Subtask 28-42-43-420-098-B ** ON A/C NOT FOR ALL

A. Preparation for Installation

Wing Tank Harness 57QT (58QT) and 63QT (64QT) ** ON A/C NOT FOR ALL

WARNING: WHEN YOU USE COMPRESSED AIR:

USE THE CORRECT PROTECTION (FACE SHIELD OR GOGGLES)
DO NOT POINT THE AIRFLOW AT YOURSELF OR OTHER PERSONS.

LOOSE PARTICLES AND/OR HIGH PRESSURE AIR CAN CAUSE INJURY.

WARNING: DO NOT LET COMPRESSED GAS TOUCH YOUR SKIN. THE GAS CAN GO THROUGH THE SKIN AND MAKE BUBBLES IN THE BLOOD. THIS CONDITION CAN KILL YOU.

(1) Use a SPATULA - PLASTIC to remove the sealant at the interface of the electrical backshell (7) and the rear spar.
(2) Use a Textile-Lint free Cotton - (Material No.14SBA1) made moist with Non Aqueous Cleaner-General - - (Material No.08BAA9) to clean:

The electrical backshell (7)
The interface of the electrical backshell (7) and the rear spar.

(3) Dry the cleaned areas with compressed air.
(4) Make sure that the parts retained from the removed component are clean and in the correct condition.

Subtask 28-42-43-420-091-C ** ON A/C NOT FOR ALL

B. Installation of the Wing-Tank Harness 57QT (58QT), 63QT (64QT)

Wing Tank Harness (Group A) - Component Location ** ON A/C NOT FOR ALL

Wing Tank Harness (Group B) - Component Location ** ON A/C NOT FOR ALL

Wing Tank Harness RIB 1 to RIB 2 - Detail ** ON A/C NOT FOR ALL

Wing Tank Harness RIB 2 to RIB 3 - Detail ** ON A/C NOT FOR ALL

Wing Tank Harness RIB 3 to RIB 4 - Detail ** ON A/C NOT FOR ALL

Wing Tank Harness RIB 5 to RIB 6 - Detail ** ON A/C NOT FOR ALL

Wing Tank Harness RIB 6 to RIB 14 - Detail ** ON A/C NOT FOR ALL

Wing Tank Harness RIB 16 to RIB 17 - Detail ** ON A/C NOT FOR ALL

Wing Tank Harness RIB 18 to RIB 21 - Detail ** ON A/C NOT FOR ALL

(1) Get access to opening 540BB ( 640BB).
(2) Identify and attach each piece of string to its applicable wing-tank harness cable.
(3) Attach the related connectors together at all the ends of the wing tank harness with a TAPE - ADHESIVE.

NOTE: This will help you move the wing tank harness through its conduit.

(4) Use the string carefully to pull the wing tank harness through its conduit.
(5) When you install the wing tank harness, make sure that it does not catch.
(6) Remove and discard the adhesive tape and the string from all the ends of the wing tank harness.
(7) Apply a Threadlocking Adhesive-- Low strength - (Material No.05BAA1) to the threads of the electrical backshell (8).
(8) Install a new AIPC 28-42-43-02-025 O-RING (4) on the electrical backshell (8).
(9) Install the electrical backshell (8) in the rear spar.
(10) Get access through opening 574BB ( 674BB).
(11) Install the washer (5) and the nut (6).
(12) TORQUE the nut (6) to between 1.27 and 1.16 m.daN (112.39 and 102.65 lbf.in )

.
(13) Use a Textile-Lint free Cotton - (Material No.14SBA1) to remove unwanted adhesive from the electrical backshell (8) and the nut (6).
(14) Safety the nut (6) an adjacent tag with a 14QFB1Wire-Locking Dia: 0.8 mm CRES Nickel Alloy -.
(15) Apply a Polysulfide Sealant-Fuel Tank Brushable - (Material No.06ABA1) around the electrical backshell (8) to seal it to the rear spar.
(16) Connect the electrical connector (7) to the electrical backshell (8).
(17) Clean the electrical connector (7) with a Textile-Lint free Cotton - (Material No.14SBA1) made moist with a Non Aqueous Cleaner-General - - (Material No.08BAA9) .
(18) Apply a continuous layer of Corrosion Preventive Compound-Heavy Duty Hard Film - (Material No.12ACB1) to the electrical connector (7).
(19) Identify the cable ends for the probes that follow:
(a) FOR [57QT] (HARNESS-LEFT WING TANK A), [58QT] (HARNESS-RIGHT WING, TANK A)
21QT1(21QT2), 54QT1(54QT2), 23QT1(23QT2), 25QT1(25QT2), 27QT1(27QT2), 29QT1(29QT2), 59QT1(59QT2) and 61QT1(61QT2).
(b) FOR [63QT] (HARNESS-LEFT WING TANK B), [64QT] (HARNESS-RIGHT WING TANK B)
54QT1(54QT2), 56QT1(56QT2), 26QT1(26QT2), 28QT1(28QT2), 30QT1(30QT2), 60QT1(60QT2) and 34QT1(34QT2).
(20) Use a CRIMPING TOOL 46447 to crimp the correct terminal connectors to the color identified wires ESPM 2048140 and ESPM 2048190.
(21) Connect the cable ends to their correct terminals of the probes (Ref. AMM TASK 28-42-15-400-005):
(a) FOR [57QT] (HARNESS-LEFT WING TANK A), [58QT] (HARNESS-RIGHT WING, TANK A)
21QT1(21QT2), 54QT1(54QT2), 23QT1(23QT2), 25QT1(25QT2), 27QT1(27QT2), 29QT1(29QT2), 59QT1(59QT2) and 61QT1(61QT2).
(b) FOR [63QT] (HARNESS-LEFT WING TANK B), [64QT] (HARNESS-RIGHT WING TANK B)
54QT1(54QT2), 56QT1(56QT2), 26QT1(26QT2), 28QT1(28QT2), 30QT1(30QT2), 60QT1(60QT2) and 34QT1(34QT2).
(22) Identify the cable ends for the sensors that follow and connect them to their correct terminals (Ref. AMM TASK 28-46-15-400-009) (Ref. AMM TASK 28-46-17-400-001) (Ref. AMM TASK 28-46-19-400-001):
(a) FOR [57QT] (HARNESS-LEFT WING TANK A), [58QT] (HARNESS-RIGHT WING, TANK A)
16QJ1(16QJ2), 29QJ1(29QJ2), 38QJ1(38QJ2), 40QJ1(40QJ2) and 17QJ1(17QJ2).
(b) FOR [63QT] (HARNESS-LEFT WING TANK B), [64QT] (HARNESS-RIGHT WING TANK B)
23QJ1(23QJ2), 24QJ1(24QJ2), 15QJ1(15QJ2), 39QJ1(39QJ2), 25QJ1(25QJ2), 26QJ1(26QJ2) and 27QJ1(27QJ2).
(c) FOR [57QT] (HARNESS-LEFT WING TANK A), [63QT] (HARNESS-LEFT WING TANK B)
correct terminals (Ref. AMM TASK 28-42-48-400-001).
(23) Identify the cable ends for the dualcomp (53QT) and connect them to their correct terminals (Ref. AMM TASK 28-42-46-400-001).
(24) Identify the cable ends for the ultracomp (52QT) and connect them to their correct terminals (Ref. AMM TASK 28-42-48-400-001).
(25) Attach the wing tank harness to the aircraft structure as follows:

Install the related loop-clamps (3) and the related bolts (2)
Install the related AIPC 28-42-05-55-010 CABLE-TIES (1) inboard of RIB15
Install the related AIPC 28-42-05-56-010 CABLE-TIES (1) outboard of RIB15.

(26) Apply a Polysulfide Sealant-Fuel Tank Brushable - (Material No.06ABA1) to the bolts (2) and their related anchor nuts.

Subtask 28-42-43-420-091-E ** ON A/C NOT FOR ALL

B. Installation of the Wing-Tank Harness 57QT (58QT), 63QT (64QT)

Wing Tank Harness (Group A) - Component Location ** ON A/C NOT FOR ALL

Wing Tank Harness (Group B) - Component Location ** ON A/C NOT FOR ALL

Wing Tank Harness RIB 1 to RIB 2 - Detail ** ON A/C NOT FOR ALL

Wing Tank Harness RIB 2 to RIB 3 - Detail ** ON A/C NOT FOR ALL

Wing Tank Harness RIB 3 to RIB 4 - Detail ** ON A/C NOT FOR ALL

Wing Tank Harness RIB 5 to RIB 6 - Detail ** ON A/C NOT FOR ALL

Wing Tank Harness RIB 6 to RIB 14 - Detail ** ON A/C NOT FOR ALL

Wing Tank Harness RIB 16 to RIB 17 - Detail ** ON A/C NOT FOR ALL

Wing Tank Harness RIB 18 to RIB 21 - Detail ** ON A/C NOT FOR ALL

NOTE: This will help you move the wing tank harness through its conduit.

(4) Use the string to carefully pull the wing tank harness through its conduit.
(5) When you install the wing tank harness, make sure that it does not catch.
(6) Remove and discard the adhesive tape and the string from every end of the wing tank harness.
(7) Apply a Threadlocking Adhesive-- Low strength - (Material No.05BAA1) to the threads of the electrical backshell (8).
(8) Install a new AIPC 28-42-43-02-025 O-RING (4) on the electrical backshell (8).
(9) Install the electrical backshell (8) in the rear spar.
(10) Get access through opening 574BB ( 674BB).
(11) Install the washer (5) and the nut (6).
(12) TORQUE the nut (6) to between 1.27 and 1.16 m.daN (112.39 and 102.65 lbf.in )

.
(13) Use a Textile-Lint free Cotton - (Material No.14SBA1) to remove unwanted adhesive from the electrical backshell (8) and the nut (6).
(14) Safety the nut (6) to an adjacent tag with 14QFB1Wire-Locking Dia: 0.8 mm CRES Nickel Alloy -.
(15) Apply a Polysulfide Sealant-Fuel Tank Brushable - (Material No.06ABA1) around the electrical backshell (8) to seal it to the rear spar.
(16) Connect the electrical connector (7) to the electrical backshell (8).
(17) Clean the electrical connector (7) with a Textile-Lint free Cotton - (Material No.14SBA1) made moist with a Non Aqueous Cleaner-General - - (Material No.08BAA9) .
(18) Apply a continuous layer of Corrosion Preventive Compound-Heavy Duty Hard Film - (Material No.12ACB1) to the electrical connector (7).
(19) Identify the cable ends for the probes that follow:
(a) FOR [57QT] (HARNESS-LEFT WING TANK A), [58QT] (HARNESS-RIGHT WING, TANK A)
21QT1(21QT2), 54QT1(54QT2), 23QT1(23QT2), 25QT1(25QT2), 27QT1(27QT2), 29QT1(29QT2), 59QT1(59QT2) and 61QT1(61QT2).
(b) FOR [63QT] (HARNESS-LEFT WING TANK B), [64QT] (HARNESS-RIGHT WING TANK B)
54QT1(54QT2), 56QT1(56QT2), 26QT1(26QT2), 28QT1(28QT2), 30QT1(30QT2), 60QT1(60QT2) and 34QT1(34QT2).
(20) Use a CRIMPING TOOL 46447 to crimp the correct terminal connectors to the color identified wires ESPM 2048140 and ESPM 2048190.
(21) Connect the cable ends to their correct terminals of the probes (Ref. AMM TASK 28-42-15-400-005):
(a) FOR [57QT] (HARNESS-LEFT WING TANK A), [58QT] (HARNESS-RIGHT WING, TANK A)
21QT1(21QT2), 54QT1(54QT2), 23QT1(23QT2), 25QT1(25QT2), 27QT1(27QT2), 29QT1(29QT2), 59QT1(59QT2) and 61QT1(61QT2).
(b) FOR [63QT] (HARNESS-LEFT WING TANK B), [64QT] (HARNESS-RIGHT WING TANK B)
54QT1(54QT2), 56QT1(56QT2), 26QT1(26QT2), 28QT1(28QT2), 30QT1(30QT2) 60QT1(60QT2) and 34QT1(34QT2).
(22) Identify the cable ends for the sensors that follow and connect them to their correct terminals (Ref. AMM TASK 28-46-15-400-009) (Ref. AMM TASK 28-46-17-400-001) (Ref. AMM TASK 28-46-19-400-001):
(a) FOR [57QT] (HARNESS-LEFT WING TANK A), [58QT] (HARNESS-RIGHT WING, TANK A)
16QJ1(16QJ2), 29QJ1(29QJ2), 38QJ1(38QJ2), 40QJ1(40QJ2) and 17QJ1(17QJ2).
(b) FOR [63QT] (HARNESS-LEFT WING TANK B), [64QT] (HARNESS-RIGHT WING TANK B)
23QJ1(23QJ2), 24QJ1(24QJ2), 15QJ1(15QJ2), 39QJ1(39QJ2), 25QJ1(25QJ2), 26QJ1(26QJ2) and 27QJ1(27QJ2).
(c) FOR [57QT] (HARNESS-LEFT WING TANK A), [63QT] (HARNESS-LEFT WING TANK B)
correct terminals (Ref. AMM TASK 28-42-48-400-001).
(23) Identify the cable ends for the dualcomp (53QT) and connect them to their correct terminals (Ref. AMM TASK 28-42-46-400-001).
(24) Identify the cable ends for the ultracomp (52QT) and connect them to their correct terminals (Ref. AMM TASK 28-42-48-400-001).
(25) Attach the wing tank harness to the aircraft structure as follows:

Install the related loop-clamps (3) and the related bolts (2).
Install the related AIPC 28-42-05-55-010 CABLE-TIES (1) and nylon spacers (9) inboard of RIB15
Install the related AIPC 28-42-05-56-010 CABLE-TIES (1) outboard of RIB15.

(26) Apply a Polysulfide Sealant-Fuel Tank Brushable - (Material No.06ABA1) to the bolts (2) and their related anchor nuts.

Subtask 28-42-43-420-091-F ** ON A/C NOT FOR ALL

B. Installation of the Wing-Tank Harness 57QT (58QT), 63QT (64QT)

Wing Tank Harness 57QT (58QT) and 63QT (64QT) ** ON A/C NOT FOR ALL

NOTE: This will help you move the wing tank harness through its conduit.

(4) Use the string to carefully pull the wing tank harness through its conduit.
(5) When you install the wing tank harness, make sure that it does not catch.
(6) Remove and discard the adhesive tape and the string from every end of the wing tank harness.
(7) Apply a Threadlocking Adhesive-- Low strength - (Material No.05BAA1) to the threads of the electrical backshell (7).
(8) Install a new AIPC 28-42-43-02-025 O-RING (8) on the electrical backshell (7).
(9) Install the electrical backshell (7) in the rear spar.
(10) Get access through the opening 574BB ( 674BB).
(11) Install the washer (9) and the nut (10).
(12) TORQUE the nut (10) to between 1.27 and 1.16 m.daN (112.39 and 102.65 lbf.in )

.
(13) Use a Textile-Lint free Cotton - (Material No.14SBA1) to remove unwanted adhesive from the electrical backshell (7) and the nut (10).
(14) Safety the nut (10) to an adjacent tag with a 14QFB1Wire-Locking Dia: 0.8 mm CRES Nickel Alloy -.
(15) Apply a Polysulfide Sealant-Fuel Tank Brushable - (Material No.06ABA1) around the electrical backshell (7) to seal it to the rear spar.
(16) Connect the electrical connector (11) to the electrical backshell (7).
(17) Clean the electrical connector (11) with a Textile-Lint free Cotton - (Material No.14SBA1) made moist with a Non Aqueous Cleaner-General - - (Material No.08BAA9) .
(18) Apply a continuous layer of Corrosion Preventive Compound-Heavy Duty Hard Film - (Material No.12ACB1) to the electrical connector (11).
(19) Identify the cable ends for the probes that follow:
(a) FOR [57QT] (HARNESS-LEFT WING TANK A), [58QT] (HARNESS-RIGHT WING, TANK A)
21QT1(21QT2), 54QT1(54QT2), 23QT1(23QT2), 25QT1(25QT2), 27QT1(27QT2), 29QT1(29QT2), 59QT1(59QT2) and 61QT1(61QT2).
(b) FOR [63QT] (HARNESS-LEFT WING TANK B), [64QT] (HARNESS-RIGHT WING TANK B)
54QT1(54QT2), 56QT1(56QT2), 26QT1(26QT2), 28QT1(28QT2), 30QT1(30QT2), 60QT1(60QT2) and 34QT1(34QT2).
(20) Use a CRIMPING TOOL 46447 to crimp the correct terminal connectors to the color identified wires ESPM 2048140 and ESPM 2048190.
(21) Connect the cable ends to their correct terminals of the probes (Ref. AMM TASK 28-42-15-400-005):
(a) FOR [57QT] (HARNESS-LEFT WING TANK A), [58QT] (HARNESS-RIGHT WING, TANK A)
21QT1(21QT2), 54QT1(54QT2), 23QT1(23QT2), 25QT1(25QT2), 27QT1(27QT2), 29QT1(29QT2), 59QT1(59QT2) and 61QT1(61QT2).
(b) FOR [63QT] (HARNESS-LEFT WING TANK B), [64QT] (HARNESS-RIGHT WING TANK B)
54QT1(54QT2), 56QT1(56QT2), 26QT1(26QT2), 28QT1(28QT2), 30QT1(30QT2) 60QT1(60QT2) and 34QT1(34QT2).
(22) Identify the cable ends for the sensors that follow and connect them to their correct terminals (Ref. AMM TASK 28-46-15-400-009) (Ref. AMM TASK 28-46-17-400-001) (Ref. AMM TASK 28-46-19-400-001):
(a) FOR [57QT] (HARNESS-LEFT WING TANK A), [58QT] (HARNESS-RIGHT WING, TANK A)
16QJ1(16QJ2), 29QJ1(29QJ2), 38QJ1(38QJ2), 40QJ1(40QJ2) and 17QJ1(17QJ2).
(b) FOR [63QT] (HARNESS-LEFT WING TANK B), [64QT] (HARNESS-RIGHT WING TANK B)
23QJ1(23QJ2), 24QJ1(24QJ2), 15QJ1(15QJ2), 39QJ1(39QJ2), 25QJ1(25QJ2), 26QJ1(26QJ2) and 27QJ1(27QJ2).
(c) FOR [57QT] (HARNESS-LEFT WING TANK A), [63QT] (HARNESS-LEFT WING TANK B)

Correct terminals (Ref. AMM TASK 28-42-48-400-001).

(23) Identify the cable ends for the dualcomp (53QT) and connect them to their correct terminals (Ref. AMM TASK 28-42-46-400-001).
(24) Identify the cable ends for the ultracomp (52QT) and connect them to their correct terminals (Ref. AMM TASK 28-42-48-400-001).
(25) Attach the wing tank harness to the aircraft structure as follows:
(a) Install the related loop-clamps (3) and the related bolts (2).
(b) Install the related new AIPC 28-42-85-55-010 CABLE-TIES (1) and nylon spacers (6) at the RIB2.
(c) Install the related loop-clamps (3), the bolt (4), the nylon spacer (6) and the nut (5) at the RIB2.
(d) TORQUE the nut (5) to between 0.40 and 0.30 m.daN (35.40 and 26.55 lbf.in )

.
(e) Install the related new cable-ties (1) inboard of the RIB15.
(f) Install the related new AIPC 28-42-85-56-010 CABLE-TIES (1) outboard of the RIB15.
(26) Apply a Polysulfide Sealant-Fuel Tank Brushable - (Material No.06ABA1) to the bolts (2) and their related anchor nuts.

Subtask 28-42-43-865-064-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
49VU	FUEL/AFT LOW LVL/& OVFL/WING R	44QJ	A11
** ON A/C NOT FOR ALL
121VU	FUEL/FQI/CHANNEL/1 AND 2	8QT	L26
121VU	FUEL/HI/LVL/SPLY	1QJ	L25
** ON A/C NOT FOR ALL
121VU	FUEL/FQI/CHAN/2	2QT	M27
121VU	FUEL/FWD LOW LVL/WING/R	45QJ	M23
121VU	FUEL/FWD LOW LVL/WING/L	46QJ	M22
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/FQI/CHANNEL/1 AND 2	8QT	L25
121VU	FUEL/HI/LVL/SPLY	1QJ	L24

Subtask 28-42-43-410-061-B ** ON A/C NOT FOR ALL

D. Close Access

Wing Tank Harness (Group A) - Component Location ** ON A/C NOT FOR ALL

Wing Tank Harness (Group B) - Component Location ** ON A/C NOT FOR ALL

Wing Tank Harness 57QT (58QT) and 63QT (64QT) ** ON A/C NOT FOR ALL

(1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the applicable tool from the spring-loaded surge door:
(a) FOR [57QT] (HARNESS-LEFT WING TANK A), [58QT] (HARNESS-RIGHT WING, TANK A)
Remove the 98D57004014000 HOOK-COVER (RIB2-SURGE DOORS) and the 98D57004013000 HOOK-COVER (RIB 2 SURGE DOORS).
(b) FOR [63QT] (HARNESS-LEFT WING TANK B), [64QT] (HARNESS-RIGHT WING TANK B)
Remove the 98D57004014000 HOOK-COVER (RIB2-SURGE DOORS).
(3) Carefully close the applicable surge door:
(a) FOR [57QT] (HARNESS-LEFT WING TANK A)
Close 540AZ 540BZ.
(b) FOR [58QT] (HARNESS-RIGHT WING, TANK A)
Close 640AZ 640BZ.
(c) FOR [63QT] (HARNESS-LEFT WING TANK B)
Close 540BZ.
(d) FOR [64QT] (HARNESS-RIGHT WING TANK B)
Close 640BZ.
(4) Close access panel 574BB(674BB).
(5) Install the applicable access panels (Ref. AMM TASK 57-27-11-400-001) (Ref. AMM TASK 57-27-11-400-002):
(a) FOR [57QT] (HARNESS-LEFT WING TANK A)
Install 540AB 540BB 540DB 540HB 540NB.
(b) FOR [58QT] (HARNESS-RIGHT WING, TANK A)
Install 640AB 640BB 640DB 640HB 640NB.
(c) FOR [63QT] (HARNESS-LEFT WING TANK B)
Install 540AB 540BB 540EB 540FB 540LB 540MB 540PB 540QB.
(d) FOR [64QT] (HARNESS-RIGHT WING TANK B)
Install 640AB 640BB 640EB 640FB 640LB 640MB 640PB 640QB.

Subtask 28-42-43-410-061-D ** ON A/C NOT FOR ALL

D. Close Access

Wing Tank Harness 57QT (58QT) and 63QT (64QT) ** ON A/C NOT FOR ALL

Wing Tank Harness (Group B) - Component Location ** ON A/C NOT FOR ALL

(1) Make sure that the work area is clean and clear of tools and other items.
(2) Install the applicable RIB2 access panels that follow:
(a) FOR [57QT] (HARNESS-LEFT WING TANK A)
Install 540AZ and 540BZ (Ref. AMM TASK 57-27-12-400-002).
(b) FOR [58QT] (HARNESS-RIGHT WING, TANK A)
Install 640AZ and 640BZ (Ref. AMM TASK 57-27-12-400-002).
(c) FOR [63QT] (HARNESS-LEFT WING TANK B)
Install 540BZ (Ref. AMM TASK 57-27-12-400-002).
(d) FOR [64QT] (HARNESS-RIGHT WING TANK B)
Install 640BZ (Ref. AMM TASK 57-27-12-400-002).
(3) Install the applicable access door 574BB ( 674BB) (Ref. AMM TASK 57-51-37-400-009).
(4) Install the applicable access panels that follow:
(a) FOR [57QT] (HARNESS-LEFT WING TANK A)
Install 540AB, 540BB, 540DB, 540HB and 540NB (Ref. AMM TASK 57-27-11-400-001) and (Ref. AMM TASK 57-27-11-400-002).
(b) FOR [58QT] (HARNESS-RIGHT WING, TANK A)
Install 640AB, 640BB, 640DB, 640HB and 640NB (Ref. AMM TASK 57-27-11-400-001) and (Ref. AMM TASK 57-27-11-400-002).
(c) FOR [63QT] (HARNESS-LEFT WING TANK B)
Install 540AB, 540BB, 540EB, 540FB, 540LB, 540MB, 540PB and 540QB (Ref. AMM TASK 57-27-11-400-001) and (Ref. AMM TASK 57-27-11-400-002).
(d) FOR [64QT] (HARNESS-RIGHT WING TANK B)
Install 640AB, 640BB, 640EB, 640FB, 640LB, 640MB, 640PB and 640QB (Ref. AMM TASK 57-27-11-400-001) and (Ref. AMM TASK 57-27-11-400-002).

Subtask 28-42-43-740-055-A ** ON A/C NOT FOR ALL

E. 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 28-42-43-942-052-A ** ON A/C NOT FOR ALL

A. 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 06:18:10 UTC