Check ACT Fuel Leak Monitor for Evidence of Fuel Leakage and Correct Closure of the Valve

TASK 28-11-00-200-003-A
Check ACT Fuel Leak Monitor for Evidence of Fuel Leakage and Correct Closure of the Valve

WARNING: OBEY THE FUEL SAFETY PROCEDURES.

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.

ZONE: 190
FIN: 184QM ** ON A/C NOT FOR ALL
FIN: 185QM ** ON A/C NOT FOR ALL
FIN: 254QM ** ON A/C NOT FOR ALL
FIN: 255QM ** 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 1M(3 FT)
No specific	AR	SAFETY BARRIER(S)
98A28104000000	5	PURGER - WATER DRAIN

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
190	BELLY FAIR, AIR CONDITIONING & HYD COMPT

C. Referenced Information

REFERENCE	DESIGNATION
TASK 12-32-28-281-001-A	Drain Water Content
TASK 28-00-00-910-001-A	Fuel Safety Procedures
TASK 28-11-27-000-001-A	Removal of the Additional Center Tank (ACT)
TASK 28-11-27-000-002-A	Removal of Additional Center Tank No.1 (ACT AFT1)
TASK 28-11-27-000-003-A	Removal of the Additional Center Tank No.2 (ACT AFT2)
TASK 28-11-27-400-001-A	Installation of the Additional Center Tank (ACT)
TASK 28-11-27-400-002-A	Installation of Additional Center Tank No.1 (ACT AFT1)
TASK 28-11-27-400-003-A	Installation of the Additional Center Tank No.2 (ACT AFT2)
TSM 28-11-00-810-802	Fuel - Leak Monitor 185QM (ACT Cavity) Shows Leakage
ACT Leak Monitor - Draining ** ON A/C NOT FOR ALL
ACT Leak Monitors - Draining ** ON A/C NOT FOR ALL

3. Job Set-up
Subtask 28-11-00-941-088-A ** ON A/C NOT FOR ALL

A. Safety Precautions
(1) Obey the fuel safety procedures (Ref. AMM TASK 28-00-00-910-001).
(2) If necessary, put an ACCESS PLATFORM 1M(3 FT) below the leak monitor(s).
(3) As necessary, use the applicable SAFETY BARRIERS, specified by the operator's instructions and your local regulations.

4. Procedure
Subtask 28-11-00-200-050-A ** ON A/C NOT FOR ALL

A. Check ACT Fuel Pipe Leak Monitor 184QM for Leakage and Correct Closure of the Valve

ACT Leak Monitor - Draining ** ON A/C NOT FOR ALL

(1) Put 98A28104000000 PURGER - WATER DRAIN in position below leak monitor 184QM.
(2) Push the probe of 98A28104000000 PURGER - WATER DRAIN into the leak monitor and drain the contents.
(3) Remove 98A28104000000 PURGER - WATER DRAIN from the leak monitor.
(4) Make sure that the leak monitor seals correctly.
(5) Examine the contents of the bottle for signs of fuel and/or water (Ref. AMM TASK 12-32-28-281-001). No fuel leakage is permitted.

NOTE: Signs of fuel show that there is a leak from the ACT transfer or vent-pipe.

Subtask 28-11-00-200-052-B ** ON A/C NOT FOR ALL

B. Check ACT Fuel Leak Monitor 185QM for Leakage and Correct Closure of the Valve

ACT Leak Monitor - Draining ** ON A/C NOT FOR ALL

(1) Put 98A28104000000 PURGER - WATER DRAIN in position below ACT leak monitor 185QM.
(2) Push the probe of the 98A28104000000 PURGER - WATER DRAIN into the leak monitor and drain the contents.
(3) Remove the 98A28104000000 PURGER - WATER DRAIN from the leak monitor.
(4) Make sure that the leak monitor seals correctly.
(5) Examine the contents of the bottle for signs of fuel and/or water (Ref. AMM TASK 12-32-28-281-001). No fuel leakage is permitted.

NOTE: Signs of fuel show that there is a fuel leak from the ACT. To identify which ACT has a leak TSM 28-11-00-810-802.

(6) If there is fuel leakage, then replace the applicable ACT1 or ACT2 (Ref. AMM TASK 28-11-27-000-001) and (Ref. AMM TASK 28-11-27-400-001).

Subtask 28-11-00-200-053-B ** ON A/C NOT FOR ALL

C. Check of ACT Fuel Leak-Monitor 253QM for Evidence of Fuel Leakage and Correct Closure of the Valve

ACT Leak Monitors - Draining ** ON A/C NOT FOR ALL

(1) Put 98A28104000000 PURGER - WATER DRAIN in position below tank leak monitor 253QM.
(2) Push the probe of 98A28104000000 PURGER - WATER DRAIN into tank leak monitor 253QM and drain the tank leak-monitor contents.
(3) Remove 98A28104000000 PURGER - WATER DRAIN from tank leak monitor 253QM.
(4) Make sure that tank leak monitor 253QM seals correctly.
(5) Examine the contents of the bottle for signs of fuel and/or water (Ref. AMM TASK 12-32-28-281-001). No fuel tank leakage is permitted.
(6) If there is any fuel leakage, examine the pipes connecting the center tank and ACT FWD and/or replace ACT FWD (Ref. AMM TASK 28-11-27-000-802).

NOTE: Signs of fuel show that there is a fuel leak:

From ACT FWD
From the pipes that connect ACT FWD to the center tank.

Subtask 28-11-00-200-054-B ** ON A/C NOT FOR ALL

D. Check of ACT Fuel Leak-Monitor 254QM for Evidence of Fuel Leakage and Correct Closure of the Valve

ACT Leak Monitors - Draining ** ON A/C NOT FOR ALL

(1) Put 98A28104000000 PURGER - WATER DRAIN in position below tank leak monitor 254QM.
(2) Push the probe of 98A28104000000 PURGER - WATER DRAIN into tank leak monitor 254QM and drain the tank leak-monitor contents.
(3) Remove 98A28104000000 PURGER - WATER DRAIN from tank leak monitor 254QM.
(4) Make sure that tank leak monitor 254QM seals correctly.
(5) Examine the contents of the bottle for signs of fuel and/or water (Ref. AMM TASK 12-32-28-281-001). No fuel tank leakage is permitted.
(6) If there is any fuel leakage, replace the applicable ACT:

For ACT AFT1 (Ref. AMM TASK 28-11-27-000-002) and (Ref. AMM TASK 28-11-27-400-002)
For ACT AFT2 (Ref. AMM TASK 28-11-27-000-003) and (Ref. AMM TASK 28-11-27-400-003).

NOTE: Signs of fuel show that there is a fuel tank leak.

Subtask 28-11-00-200-055-B ** ON A/C NOT FOR ALL

E. Check of ACT Fuel Leak-Monitor 255QM for Evidence of Fuel Leakage and Correct Closure of the Valve

ACT Leak Monitors - Draining ** ON A/C NOT FOR ALL

(1) Put 98A28104000000 PURGER - WATER DRAIN in position below pipe leak monitor 255QM.
(2) Push the probe of 98A28104000000 PURGER - WATER DRAIN into pipe leak monitor 255QM and drain the pipe leak-monitor contents.
(3) Remove the 98A28104000000 PURGER - WATER DRAIN from pipe leak monitor 255QM.
(4) Make sure that pipe leak-monitor 255QM seals correctly.
(5) Examine the contents of the bottle for signs of fuel and/or water (Ref. AMM TASK 12-32-28-281-001). No fuel tank leakage is permitted.
(6) If there is a fuel leakage, examine for leaks in the pipes that:

Connect the center tank and ACT AFT1
Supply the APU.

NOTE: Signs of fuel show that there is a leak in the pipes that:

Connect the center tank and ACT AFT1 in the rear cargo bay
Supply the APU.

5. Close-up
Subtask 28-11-00-942-094-A ** ON A/C NOT FOR ALL

A. Removal of Equipment
(1) Make sure that the work area is clean and clear of tools and other items.
(2) If installed, remove the safety barriers.
(3) If applicable, 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] 2026.04.01 07:22:37 UTC