Operational Check of the Leak Monitor for the Indication of Fuel Leakage

TASK 28-28-00-200-003-A
Operational Check of the Leak Monitor for the Indication of Fuel Leakage

WARNING: OBEY THE FUEL SAFETY PROCEDURES.

WARNING: BE CAREFUL NOT TO GET AIRCRAFT FUEL IN YOUR MOUTH OR IN YOUR EYES. IF YOU GET FUEL ON YOUR SKIN OR ON YOUR CLOTHES, FLUSH IT IMMEDIATELY WITH WATER. IF NECESSARY, GET MEDICAL HELP. AIRCRAFT FUEL IS POISONOUS.

WARNING: DO NOT GET YOUR CLOTHES SOAKED WITH FUEL.

1. Reason for the Job
Refer to the MPD TASK: 282800-01
OPERATIONAL CHECK OF LEAK MONITOR FOR EVIDENCE OF FUEL LEAKAGE.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	1	ACCESS PLATFORM 1M(3 FT)
98A28104000000	1	PURGER - WATER DRAIN

B. Referenced Information

REFERENCE	DESIGNATION
TASK 12-32-28-281-001-A	Drain Water Content
TASK 28-00-00-910-001-A	Fuel Safety Procedures
TSM 28-11-00-810-803	Fuel - Leak Monitor 253QM (FWD ACTs Cavity/Shroud) Shows Leakage
TSM 28-11-00-810-804	Fuel - Leak Monitor 254QM (AFT ACTs Cavity) Shows Leakage
TSM 28-28-00-810-837	Fuel - Leak Monitor 184QM (ACT Shroud) Shows Leakage
TSM 28-28-00-810-838	Fuel - Leak Monitor 255QM (AFT ACT Shroud) Shows Leakage
Leak Monitor ACT ** ON A/C NOT FOR ALL
Leak Monitor ACT ** ON A/C NOT FOR ALL

3. Job Set-up
Subtask 28-28-00-860-066-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) Obey the fuel safety procedure (Ref. AMM TASK 28-00-00-910-001).
(2) Put an ACCESS PLATFORM 1M(3 FT) below the applicable leak monitor.

4. Procedure
Subtask 28-28-00-281-052-A ** ON A/C NOT FOR ALL

A. Check of the ACT Leak Monitors.
(1) Do the check on leak monitor 184QM (pipes ACT):
(a) Put the 98A28104000000 PURGER - WATER DRAIN in position below leak monitor 184QM.
(b) Push the probe of the 98A28104000000 PURGER - WATER DRAIN into the leak monitor 184QM to drain the content of the leak monitor.
(c) Remove the 98A28104000000 PURGER - WATER DRAIN from leak monitor 184QM.
(d) Make sure that the leak monitor valve seals correctly.
(e) Examine the content of the bottle for signs of fuel and/or water (Ref. AMM TASK 12-32-28-281-001).

NOTE: If the content of the bottle is fuel, the ACT pipe system can have a possible fuel leakage.

NOTE: Fuel leaks are not permitted.

(f) If necessary, do the applicable trouble shooting TSM 28-28-00-810-837, to find the source of the fuel leakage.
(2) Do the check on leak monitor 185QM (Cavity ACT):
(a) Put the 98A28104000000 PURGER - WATER DRAIN in position below leak monitor 185QM.
(b) Push the probe of the 98A28104000000 PURGER - WATER DRAIN into leak monitor 185QM to drain the content of the leak monitor.
(c) Remove the 98A28104000000 PURGER - WATER DRAIN from leak monitor 185QM.
(d) Make sure that the leak monitor valve seals correctly.
(e) Examine the content of the bottle for signs of fuel and/or water (Ref. AMM TASK 12-32-28-281-001).

NOTE: If the content of the bottle is fuel, the bladder tank of the ACT can have a possible fuel leakage.

NOTE: Fuel leaks are not permitted.

(f) If necessary, do the applicable trouble shooting TSM 28-28-00-810-837, to find the source of the fuel leakage.

Subtask 28-28-00-281-052-B ** ON A/C NOT FOR ALL

A. Operational Check of Leak Monitor for Evidence of Fuel Leakage
(1) If leak monitor 253QM (ACT forward cargo) is installed, do a leak check on leak monitor 253QM:
(a) Put the 98A28104000000 PURGER - WATER DRAIN in position below leak monitor 253QM.
(b) Push the probe of the 98A28104000000 PURGER - WATER DRAIN into leak monitor 253QM to drain the content of the leak monitor.
(c) Remove the 98A28104000000 PURGER - WATER DRAIN from leak monitor 253QM.
(d) Make sure that the leak monitor valve seals correctly.
(e) Examine the content of the bottle for signs of fuel and/or water (Ref. AMM TASK 12-32-28-281-001).
(f) If the content of the bottle is fuel, do the related troubleshooting TSM 28-11-00-810-803.

NOTE: Fuel leaks are not permitted.

(2) Do the check on leak monitor 254QM (ACT aft cargo):
(a) Put the 98A28104000000 PURGER - WATER DRAIN in position below leak monitor 254QM.
(b) Push the probe of the 98A28104000000 PURGER - WATER DRAIN into leak monitor 254QM to drain the content of the leak monitor.
(c) Remove the 98A28104000000 PURGER - WATER DRAIN from leak monitor 254QM.
(d) Make sure that the leak monitor valve seals correctly.
(e) Examine the content of the bottle for signs of fuel and/or water (Ref. AMM TASK 12-32-28-281-001).
(f) If the content of the bottle is fuel, do the related troubleshooting TSM 28-11-00-810-804.

NOTE: Fuel leaks are not permitted.

(3) Do the check on leak monitor 255QM (pipes ACT):
(a) Put the 98A28104000000 PURGER - WATER DRAIN in position below leak monitor 255QM.
(b) Push the probe of the 98A28104000000 PURGER - WATER DRAIN into leak monitor 255QM to drain the content of the leak monitor.
(c) Remove the 98A28104000000 PURGER - WATER DRAIN from leak monitor 255QM.
(d) Make sure that the leak monitor valve seals correctly.
(e) Examine the content of the bottle for signs of fuel and/or water (Ref. AMM TASK 12-32-28-281-001).
(f) If the content of the bottle is fuel, do the related troubleshooting TSM 28-28-00-810-838.

NOTE: Fuel leaks are not permitted.

5. Close-up
Subtask 28-28-00-860-068-A ** ON A/C NOT FOR ALL

A. Put the aircraft back to the serviceable condition.
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the access platform(s).

[Rev.10 from 2021] 2026.04.01 07:22:23 UTC