Removal of the Vent Surge Tank-Harness

TASK 28-46-43-000-001-A
Removal of the Vent Surge Tank-Harness

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.

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	CAP - BLANKING
No specific	AR	CORD - PATCH
No specific	AR	SAFETY BARRIER(S)
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER

B. 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

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 28-12-45-000-001-A	Removal 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 57-27-11-000-002-A	Removal of the Access Panel
TASK 57-51-37-000-005-A	Removal 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 28-46-43-941-052-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) Put the SAFETY BARRIER(S) in position.

Subtask 28-46-43-650-054-A

B. Fuel Configuration
(1) Drain the remaining fuel from the applicable vent surge tank (Ref. AMM TASK 28-25-00-650-003).

Subtask 28-46-43-865-050-A

C. 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

Subtask 28-46-43-010-053-A ** ON A/C NOT FOR ALL

D. Get Access
(1) Put the ACCESS PLATFORM 4M (13 FT) in position below the applicable access panels 550DB, 560AB and 550CB (650DB, 660AB and 650CB).
(2) Remove the applicable access panels 550CB (650CB), 550DB (650DB) and 560AB (660AB) (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 28-46-43-010-053-B ** ON A/C NOT FOR ALL

D. Get Access
(1) Put the ACCESS PLATFORM 4M (13 FT) in position below the applicable access panels 550CB, 550DB and 575LB (650CB, 650DB and 675LB).
(2) Remove the applicable access panels 550CB (650CB), 550DB (650DB) and 575LB (675LB) (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 28-46-43-010-053-C ** ON A/C NOT FOR ALL

D. Get Access
(1) Put the ACCESS PLATFORM 4M (13 FT) in position below the applicable access panels 540QB, 550AB, 550BB and 550CB (640QB, 650AB, 650BB and 650CB).
(2) Remove the applicable access panels 540QB (640QB), 550AB (650AB), 550BB (650BB) and 550CB (650CB) (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 540QB 550AB 550BB 550CB.

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

Remove 640QB 650AB 650BB 650CB.

4. Procedure
Subtask 28-46-43-020-052-A ** ON A/C NOT FOR ALL

A. Removal of the Vent Surge Tank-Harness
(1) Get access through the opening 550CB(650CB) and loosen :

the clamp screw (6)
the electrical connector screws (1) and (2).

(2) Cut and discard the cable ties (4).
(3) Disconnect the end of the harness (5) from the sensor 28QJ1 (28QJ2).
(4) Attach a length of CORD - PATCH to the inboard end of the harness (5). This will help to install a new harness.
(5) Get access through the opening 560AB(660AB) and disconnect the bayonet electrical connector (12) from the connector (8).
(6) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
(7) Remove the nut (11) and the washer (10).
(8) Get access through the opening 550DB(650DB) and cut and discard the cable tie (7).
(9) Remove the connector (8) from the hole in RIB26.
(10) Remove and discard the O-ring (9).
(11) Carefully pull the harness (5) and the attached end of the CORD - PATCH, outboard from the conduit (3).
(12) When the CORD - PATCH hangs from the outboard end of the conduit (3), release it from the harness (5).

Subtask 28-46-43-020-052-B ** ON A/C NOT FOR ALL

A. Removal of the Vent Surge Tank-Harness
(1) Loosen the clamp screw (6) and the electrical connector screws (1) and (2).
(2) Cut and discard the cable ties (4).
(3) Disconnect the end of the harness (5) from the sensor 28QJ1 (28QJ2).
(4) Attach a length of CORD - PATCH to the inboard end of the harness (5). This will help to install a new harness.
(5) Disconnect the bayonet electrical connector (12) from the connector (8).
(6) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
(7) Remove the nut (11) and the washer (10).
(8) Cut and discard the cable tie (7).
(9) Remove the connector (8) from the hole in the rear spar.
(10) Remove and discard the O-ring (9).
(11) Carefully pull the harness (5) and the attached end of the CORD - PATCH, outboard from the conduit (3).
(12) When the CORD - PATCH hangs from the outboard end of the conduit (3), release it from the harness (5).

Subtask 28-46-43-020-052-C ** ON A/C NOT FOR ALL

A. Removal of the Vent Surge Tank-Harness
(1) Loosen the clamp screw (9) and the electrical connector screws (10) and (6).
(2) Cut and discard the cable ties (7).
(3) Disconnect the end of the harness (8) from the sensor 28QJ1 (28QJ2).
(4) Attach a length of CORD - PATCH to the outboard end of the harness (8). This will help to install a new harness.
(5) Disconnect the connector (1) from the bayonet electrical connector (2).
(6) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
(7) Remove the nuts (3), bolts (5) and the anti-rotation plate (4) from RIB22.
(8) Remove the bayonet electrical connector (2) from the hole in RIB22.
(9) Carefully pull the harness (8) and the attached end of the CORD - PATCH, inboard from the conduit.
(10) When the CORD - PATCH hangs from the inboard end of the conduit, release it from the harness (8).

[Rev.10 from 2021] 2026.04.02 06:18:17 UTC