Installation of the Vent Surge Tank-Harness

TASK 28-46-43-400-001-A
Installation of the Vent Surge Tank-Harness

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: 34QJ1
FIN: 34QJ2

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	AR	SAFETY BARRIER(S)
No specific	AR	SPATULA - PLASTIC
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 0.40 and 0.30 m.daN (35.40 and 26.55 lbf.in )
No specific	Torque wrench: range to between 0.34 and 0.32 m.daN (30.09 and 28.32 lbf.in )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.05BAA1)	Threadlocking Adhesive-- Low strength -
(Material No.05JBB9)	Contact Adhesive-Rubber & Plastic Bonding Nitrile base -
(Material No.06ABB1)	Polysulfide Sealant-Fuel Tank Fillet -
(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 [34QJ1] (HARNESS-L VENT SURGE TK)
550CB
550DB
575LB
560AB
540QB, 550AB, 550BB
FOR [34QJ2] (HARNESS-R VENT SURGE TK)
650CB
660AB
640QB, 650AB, 650BB
650DB
675LB

D. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
4	CABLE TIES	AIPC 28-42-05-56-010
7	CABLE TIE	AIPC 28-42-05-56-010
7	CABLE TIE	AIPC 28-42-85-30-010
4	CABLE TIES	AIPC 28-42-85-56-010
7	CABLE TIE	AIPC 28-42-85-56-010
9	O-RING	AIPC 28-46-43-01-015
9	O-RING	AIPC 28-46-85-28-050

E. Referenced Information

REFERENCE	DESIGNATION
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 28-12-45-000-001-A	Removal of the Panel Assembly
TASK 28-12-45-400-002-A	Installation of the Panel Assembly
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 28-46-00-740-001-A	Functional (BITE) Test
TASK 57-27-11-000-002-A	Removal of the Access Panel
TASK 57-27-11-400-002-A	Installation of the Access Panel
TASK 57-51-37-000-005-A	Removal of the Access Panels 575KB(675KB), 575LB(675LB), 575MB(675MB)
TASK 57-51-37-400-005-A	Installation of the Access Panels 575KB(675KB), 575LB(675LB), 575MB(675MB)
Vent Surge Tank-Harness 34QJ1(34QJ2) ** ON A/C NOT FOR ALL
Vent Surge Tank-Harness 34QJ1(34QJ2) ** ON A/C NOT FOR ALL
Vent Surge Tank-Harness 34QJ1(34QJ2) ** ON A/C NOT FOR ALL

3. Job Set-up
Subtask 28-46-43-941-053-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) 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 28-46-43-865-051-A

B. 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

Subtask 28-46-43-860-050-A ** ON A/C NOT FOR ALL

C. Aircraft Maintenance Configuration
(1) Make sure that the applicable vent surge tank is drained of fuel (Ref. AMM TASK 28-25-00-650-003).
(2) Make sure that the ACCESS PLATFORM 4M (13 FT) is below the applicable panel 550CB, 550DB and 560AB (650CB, 650DB and 660AB).
(3) Make sure that the applicable access panels 550CB(650CB), 550DB(650DB) and 560AB(660AB) are removed (Ref. AMM TASK 28-10-00-910-002), (Ref. AMM TASK 57-27-11-000-002), (Ref. AMM TASK 28-12-45-000-001):
(a) FOR [34QJ1] (HARNESS-L VENT SURGE TK)

remove 550CB, 550DB, 560AB.

(b) FOR [34QJ2] (HARNESS-R VENT SURGE TK)

remove 650CB, 650DB, 660AB.

Subtask 28-46-43-860-050-B ** ON A/C NOT FOR ALL

C. Aircraft Maintenance Configuration
(1) Make sure that the applicable vent surge tank is drained of fuel (Ref. AMM TASK 28-25-00-650-003).
(2) Make sure that the ACCESS PLATFORM 4M (13 FT) is below the applicable panel 550CB, 550DB and 575LB (650CB, 650DB and 675LB).
(3) Make sure that the applicable access panels 550CB(650CB), 550DB(650DB) and 575LB(675LB) are removed (Ref. AMM TASK 28-10-00-910-002), (Ref. AMM TASK 57-27-11-000-002), (Ref. AMM TASK 57-51-37-000-005), (Ref. AMM TASK 28-12-45-000-001):
(a) FOR [34QJ1] (HARNESS-L VENT SURGE TK)

remove 550CB, 550DB, 575LB.

(b) FOR [34QJ2] (HARNESS-R VENT SURGE TK)

remove 650CB, 650DB, 675LB.

Subtask 28-46-43-860-050-C ** ON A/C NOT FOR ALL

C. Aircraft Maintenance Configuration
(1) Make sure that the applicable vent surge tank is drained of fuel (Ref. AMM TASK 28-25-00-650-003).
(2) Make sure that the ACCESS PLATFORM 4M (13 FT) is below the applicable panel 540QB, 550AB, 550BB and 550CB (640QB, 640AB, 640BB and 640CB).
(3) Make sure that the applicable access panels 540QB(640QB), 550AB(650AB), 550BB(650BB) and 550CB(650CB) are removed (Ref. AMM TASK 28-10-00-910-002), (Ref. AMM TASK 57-27-11-000-002), (Ref. AMM TASK 57-51-37-000-005), (Ref. AMM TASK 28-12-45-000-001):
(a) FOR [34QJ1] (HARNESS-L VENT SURGE TK)

Remove 540QB, 550AB, 550BB, 550CB.

(b) FOR [34QJ2] (HARNESS-R VENT SURGE TK)

Remove 640QB, 550AB, 550BB, 550CB.

4. Procedure
Subtask 28-46-43-420-051-A ** ON A/C NOT FOR ALL

A. Preparation for Installation
(1) Remove the nut (11) and the washer (10) from the new connector (8), but keep the CAP - BLANKING on the connector.
(2) Get access through the opening 550DB(650DB).
(3) Use a SPATULA - PLASTIC to remove all the remaining sealant.
(4) Use a clean Textile-Lint free Cotton - (Material No.14SBA1) made moist with Non Aqueous Cleaner-General - - (Material No.08BAA9) to clean the:

flange and the thread of the connector (8)
thread of the nut (11)
area of RIB26 around the connector hole
sealant from around the connector hole in RIB26.

(5) Make sure that the parts retained from the removed component are clean and in the correct condition.
(6) Do an inspection of the component interfaces and the adjacent area.
(7) Apply a small quantity of Contact Adhesive-Rubber & Plastic Bonding Nitrile base - (Material No.05JBB9) , at three positions and equal distances apart, in the groove for the O-ring (9).
(8) Install the new AIPC 28-46-43-01-015 O-RING (9) or AIPC 28-46-85-28-050 O-RING (9) in the groove.

NOTE: It takes approximately five minutes for the O-ring to bond in the groove sufficiently to install the connector.

Subtask 28-46-43-420-050-A ** ON A/C NOT FOR ALL

B. Installation of the Vent Surge Tank-Harness
(1) Attach the CORD - PATCH which hangs from the outboard end of the conduit (3) to the end of the harness (5).
(2) Get access through the opening 550CB(650CB) and use the CORD - PATCH to pull the harness (5) inboard through the conduit (3).
(3) Release the harness from the CORD - PATCH and discard the CORD - PATCH.
(4) Attach the terminals of the harness (5) to the connector screws (1) and (2) of the sensor 28QJ1(28QJ2).
(5) TORQUE the connector screw (1) to between 0.124 and 0.102 m.daN (10.97 and 9.03 lbf.in )

.
(6) TORQUE the connector screw (2) to between 0.226 and 0.204 m.daN (20.00 and 18.05 lbf.in )

.
(7) Put the harness (5) into the sensor clamp with the clamp screw (6).
(8) TORQUE the clamp screw (6) to between 0.067 and 0.034 m.daN (5.93 and 3.01 lbf.in )

.
(9) Apply a thin layer of Threadlocking Adhesive-- Low strength - (Material No.05BAA1) to the thread of the connector (8).
(10) Put the connector (8) in position in the hole in RIB26.
(11) Get access through the opening 560AB(660AB) and install the washer (10) and the nut (11) on the connector (8).
(12) TORQUE the nut (11) to between 0.34 and 0.32 m.daN (30.09 and 28.32 lbf.in )

(13) Use a Textile-Lint free Cotton - (Material No.14SBA1) to remove the unwanted adhesive from the connector (8) and the nut (11).
(14) Put the harness (5) in the routing shown

Vent Surge Tank-Harness 34QJ1(34QJ2) ** ON A/C NOT FOR ALL

and attach it with the new AIPC 28-42-05-56-010 CABLE TIE (7) or AIPC 28-42-85-56-010 CABLE TIE (7).
(15) Apply a bead of Polysulfide Sealant-Fuel Tank Fillet - (Material No.06ABB1) around the flange of the connector (8) at the interface with RIB26.
(16) Get access through the opening 550CB(650CB) and attach the harness (5) with the new AIPC 28-42-05-56-010 CABLE TIES (4) or AIPC 28-42-85-56-010 CABLE TIES (4).
(17) Get access through the opening 560AB(660AB) and remove the protective caps from the electrical connectors.
(18) Connect the bayonet electrical connector (12) to the connector (8).

Subtask 28-46-43-420-051-B ** ON A/C NOT FOR ALL

C. Preparation for Installation
(1) Remove the nut (11) and the washer (10) from the new connector (8), but keep the CAP - BLANKING on the connector.
(2) Use a SPATULA - PLASTIC to remove all the remaining sealant.
(3) Use a clean Textile-Lint free Cotton - (Material No.14SBA1) made moist with Non Aqueous Cleaner-General - - (Material No.08BAA9) to clean the:

flange and the thread of the connector (8)
thread of the nut (11)
area of the rear spar around the connector hole
sealant from around the connector hole in the rear spar.

(4) Make sure that the parts retained from the removed component are clean and in the correct condition.
(5) Do an inspection of the component interfaces and the adjacent area.
(6) Apply a small quantity of Contact Adhesive-Rubber & Plastic Bonding Nitrile base - (Material No.05JBB9) , at three positions and equal distances apart, in the groove for the O-ring (9).
(7) Install the new AIPC 28-46-43-01-015 O-RING (9) in the groove.

NOTE: It takes approximately five minutes for the O-ring to bond in the groove sufficiently to install the connector.

Subtask 28-46-43-420-050-B ** ON A/C NOT FOR ALL

D. Installation of the Vent Surge Tank-Harness
(1) Attach the CORD - PATCH which hangs from the outboard end of the conduit (3) to the end of the harness (5).
(2) Use the CORD - PATCH to pull the harness (5) inboard through the conduit (3).
(3) Release the harness from the CORD - PATCH and discard the CORD - PATCH.
(4) Attach the terminals of the harness (5) to the connector screws (1) and (2) of the sensor 28QJ1(28QJ2).
(5) TORQUE the connector screw (1) to between 0.124 and 0.102 m.daN (10.97 and 9.03 lbf.in )

.
(6) TORQUE the connector screw (2) to between 0.226 and 0.204 m.daN (20.00 and 18.05 lbf.in )

.
(7) Put the harness (5) into the sensor clamp with the clamp screw (6).
(8) TORQUE the clamp screw (6) to between 0.067 and 0.034 m.daN (5.93 and 3.01 lbf.in )

.
(9) Apply a thin layer of Threadlocking Adhesive-- Low strength - (Material No.05BAA1) to the thread of the connector (8).
(10) Put the connector (8) in position in the hole in the rear spar.
(11) Install the washer (10) and the nut (11) on the connector (8).
(12) TORQUE the nut (11) to between 0.34 and 0.32 m.daN (30.09 and 28.32 lbf.in )

.
(13) Use a Textile-Lint free Cotton - (Material No.14SBA1) to remove the unwanted adhesive from the connector (8) and the nut (11).
(14) Put the harness (5) in the routing shown

Vent Surge Tank-Harness 34QJ1(34QJ2) ** ON A/C NOT FOR ALL

and attach it with the new AIPC 28-42-05-56-010 CABLE TIE (7).
(15) Apply a bead of Polysulfide Sealant-Fuel Tank Fillet - (Material No.06ABB1) around the flange of the connector (8) at the interface with the rear spar.
(16) Attach the harness (5) with the new AIPC 28-42-05-56-010 CABLE TIES (4).
(17) Remove the CAP-BLANKING from each electrical connector and receptacle.
(18) Connect the bayonet electrical connector (12) to the connector (8).

Subtask 28-46-43-420-051-C ** ON A/C NOT FOR ALL

E. Preparation for Installation.
(1) Use a SPATULA - PLASTIC to remove all the remaining sealant.
(2) Use a clean Textile-Lint free Cotton - (Material No.14SBA1) made moist with Non Aqueous Cleaner-General - - (Material No.08BAA9) to clean the:

Flange of the connector (2)
Area of RIB22 around the connector hole
Sealant from around the connector hole in RIB22.

(3) Make sure that the parts retained from the removed component are clean and in the correct condition.
(4) Do an inspection of the component interfaces and the adjacent area.

Subtask 28-46-43-420-050-C ** ON A/C NOT FOR ALL

F. Installation of the Vent Surge Tank-Harness
(1) Attach the CORD - PATCH which hangs from the inboard end of the conduit to the end of the harness (8).
(2) Use the CORD - PATCH to pull the harness (8) outboard through the conduit.
(3) Release the harness from the CORD - PATCH and discard the CORD - PATCH.
(4) Attach the terminals of the harness (8) to the connector screws (10) and (6) of the sensor 28QJ1(28QJ2).
(5) TORQUE the connector screw (10) to between 0.124 and 0.102 m.daN (10.97 and 9.03 lbf.in )

.
(6) TORQUE the connector screw (6) to between 0.226 and 0.204 m.daN (20.00 and 18.05 lbf.in )

.
(7) Put the harness (8) into the sensor clamp with the clamp screw (9).
(8) TORQUE the clamp screw (9) to between 0.067 and 0.034 m.daN (5.93 and 3.01 lbf.in )

.
(9) Put the bayonet electrical connector (2) in position in the hole in RIB22.
(10) Install the anti-rotation plate (4) with the bolts (5) and the nuts (3) on the outward end of RIB22.
(11) TORQUE the nuts (3) to between 0.40 and 0.30 m.daN (35.40 and 26.55 lbf.in )

.
(12) Do a bonding check of the bolts (5) (Ref. AMM TASK 20-28-00-912-802). The bonding resistance must be less than 10 milliohms.
(13) Use a Textile-Lint free Cotton - (Material No.14SBA1) to remove the unwanted adhesive from the connector (1).
(14) Put the harness (8) in the routing shown

Vent Surge Tank-Harness 34QJ1(34QJ2) ** ON A/C NOT FOR ALL

and attach it with the new AIPC 28-42-85-30-010 CABLE TIE (7).
(15) Apply a bead of Polysulfide Sealant-Fuel Tank Fillet - (Material No.06ABB1) around the flange of the connector (1) at the interface with the rear spar.
(16) Attach the harness (8) with the new cable ties (7).
(17) Remove the CAP-BLANKING from each electrical connector and receptacle.
(18) Connect the connector (1) to the bayonet electrical connector (2).

Subtask 28-46-43-865-052-A

G. 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

Subtask 28-46-43-740-051-A

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

5. Close-up
Subtask 28-46-43-410-051-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) Install the applicable access panels (Ref. AMM TASK 28-10-00-910-002), (Ref. AMM TASK 57-27-11-400-002) and (Ref. AMM TASK 28-12-45-400-002):
(a) FOR [34QJ1] (HARNESS-L VENT SURGE TK)

install 550CB 550DB 560AB.

(b) FOR [34QJ2] (HARNESS-R VENT SURGE TK)

install 650CB 650DB 660AB.

Subtask 28-46-43-410-051-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 panels (Ref. AMM TASK 28-10-00-910-002), (Ref. AMM TASK 57-27-11-400-002), (Ref. AMM TASK 57-51-37-400-005) and (Ref. AMM TASK 28-12-45-400-002):
(a) FOR [34QJ1] (HARNESS-L VENT SURGE TK)

install 550CB 550DB 575LB.

(b) FOR [34QJ2] (HARNESS-R VENT SURGE TK)

install 650CB 650DB 675LB.

Subtask 28-46-43-410-051-C ** ON A/C NOT FOR ALL

Install 540QB 550AB 550BB 550CB.

(b) FOR [34QJ2] (HARNESS-R VENT SURGE TK)

Install 640QB 650AB 650BB 650CB.

Subtask 28-46-43-942-052-A

B. 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 06:18:17 UTC