Fuel - Unwanted Material (Debris) In The Left (Right) Wing-Tank (Outboard of the Rib2)

TASK 28-11-00-810-809-A
Fuel - Unwanted Material (Debris) In The Left (Right) Wing-Tank (Outboard of the Rib2)

WARNING: OBEY THE FUEL SAFETY PROCEDURES.

1. Possible Causes

the remains of something broken or thus come loose from inside the aircraft fuel-tanks
a quantity of pieces
something discarded (FOD or rubbish)

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
TSM TASK 28-11-00-810-808-A	Fuel - Unwanted Material (Debris) In The Left (Right) Wing Fuel-Tank Collector-Cell Installation
TSM TASK 28-11-00-810-810-A	Fuel - Unwanted Material (Debris) In The Center-Tank Fuel Installation
AMM 28-11-00-100-001	Cleaning of the Fuel Tanks
AMM 28-11-00-600-003	Removal of Microbiological Particles

3. Fault Confirmation
Subtask 28-11-00-710-059-A

A. Test
(1) No test is applicable.
You have found unwanted material (debris).

NOTE: For the purpose of this TSM procedure unwanted material (debris) is an item that must not be there. It can include the items that follow:

the remains of something broken or thus come loose from inside the aircraft fuel-tanks (example, a section of fuel-tank sealing compound)
a quantity of pieces (example, sealant, an old tie-wrap or locking wire)
something discarded (FOD or rubbish) (example, a paper towel, a cleaning rag, a coin or tool).

It does not include microbiological contamination/particles.
For the Removal of Mocrobiological Particles do the procedure AMM 28-11-00-600-003.

(2) Try to identify the unwanted material and its source.

NOTE: If you know what the unwanted material is, and thus its possible source, it can save you a lot of time.

(3) Go to Para. 4.A.

NOTE: The procedure that follows is a guide to help you troubleshoot for unwanted material. It is not a full investigation that would require all LRUs and fuel space to be examined.

4. Fault Isolation
Subtask 28-11-00-810-058-B ** ON A/C NOT FOR ALL

A. Procedure
(1) To get the most from this TSM procedure we recommend that you read all of the work steps that follow before you continue. This will let you adapt the procedure to your applicable problem of unwanted material.
(2) At the applicable wing, get access to the wing-tank (outboard of Rib2) as given in the AMM procedure 'Cleaning of the Fuel Tanks' AMM 28-11-00-100-001.
(3) Do a visual inspection, for unwanted material/debris, as given in the steps that follow:

NOTE: Good lighting must be available during each step of the inspection.

NOTE: The inspection must be fully (thoroughly) done to get a result that you can be sure of.

(a) In the inner-cell between Ribs 2 and 15 do an inspection of:

the lowest point
the opening and adjacent area outboard of each of the seven clack valves (installed at Rib2) - see step (5)
the wing tank inner vent pipe
the outboard side of each wing rib (2 thru 14)
the spill-pipe outlet
the float vent valve 16QM (17QM)
the ICTV drive-shaft 70QM (72QM).

(b) In the outer-cell between Ribs 15 and 22 do an inspection of:

the lowest point
the opening and adjacent area outboard of each of the two intercell transfer valves (Rib15)
the ICTV drive-shaft 71QM (73QM)
the float vent valve 15QM (18QM)
the overpressure protector 102QM (103QM)
the overpressure protector located on the access door 540HB (640HB)
the scavenge jet pumps and pipes
the outboard side of each wing rib (15 thru 21)
the spill-pipe inlet.

the lowest point
the scavenge pick-up pipe
the outboard side of each wing rib (22, 23, 24 and 25)
the vent duct (NACA intake and vent protector)
the overpressure protector 46QM (47QM)
the wing-tank vent duct
the opening to the center-tank vent pipe (left wing only) - see step (5).

(d) For the common items to all areas, do an inspection of the area(s):

below each fuel quantity probe
below each fuel level sensor
adjacent to all the fuel pipes.

(4) Remove all the unwanted material.
(5) If you find unwanted material in/at the areas that follow, you must do the related TSM Task given:

an opening to one of the seven clack valves (Rib2), do the troubleshooting of the Collector-Cell Installation (Ref. TSM TASK 28-11-00-810-808)
the opening to the center-tank vent pipe, do the troubleshooting of The Center-Tank Fuel Installation (Ref. TSM TASK 28-11-00-810-810).

NOTE: It is important you do these checks to make sure that unwanted material has not moved to other parts of the storage systems.

Subtask 28-11-00-810-058-D ** ON A/C NOT FOR ALL

NOTE: Good lighting must be available during each step of the inspection.

NOTE: The inspection must be fully (thoroughly) done to get a result that you can be sure of.

(a) In the main tank between Ribs 2 and 22 do an inspection of:

the lowest point
the opening and adjacent area outboard of each of the seven clack valves (installed at Rib2) - see step (5)
the wing tank inner vent pipe
the outboard side of each wing rib (2 thru 21)
the overpressure protector located on the access door 540PB (640PB).

(b) In the surge-tank between Ribs 22 and 26 do an inspection of:

the lowest point
the clack valves 214QM (215QM) and 216QM (217QM)
the outboard side of each wing rib (22, 23, 24 and 25)
the vent duct (NACA intake and vent protector)
the overpressure protector 46QM (47QM)
the wing-tank vent duct
the opening to the center-tank vent pipe (left wing only) - see step (5).

below each fuel quantity probe
below each fuel level sensor
adjacent to all the fuel pipes.

(4) Remove all the unwanted material.
(5) If you find unwanted material in/at the areas that follow, you must do the related TSM Task given:

an opening to one of the seven clack valves (Rib2), do the troubleshooting of the Collector-Cell Installation (Ref. TSM TASK 28-11-00-810-808)
the opening to the center-tank vent pipe, do the troubleshooting of The Center-Tank Fuel Installation (Ref. TSM TASK 28-11-00-810-810).

NOTE: It is important you do these checks to make sure that unwanted material has not moved to other parts of the storage systems.

[Rev.8 from Aug 2018] 2026.04.04 04:28:26 UTC