DOC AIRBUS | TSM A320FFuel - Unwanted Material (Debris) In The Left (Right) Wing Fuel-Tank Collector-Cell Installation
TASK 28-11-00-810-808-A
Fuel - Unwanted Material (Debris) In The Left (Right) Wing Fuel-Tank Collector-Cell Installation
A. Referenced Information
3. Fault Confirmation
Subtask 28-11-00-710-058-A
Subtask 28-11-00-810-057-A ** ON A/C NOT FOR ALL
[Rev.8 from Aug 2018]
2026.04.04 04:28:26 UTC
Fuel - Unwanted Material (Debris) In The Left (Right) Wing Fuel-Tank Collector-Cell Installation
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) - fuel-pump strainer
A. Referenced Information
| REFERENCE | DESIGNATION |
|---|---|
| TSM TASK 28-11-00-810-809-A | Fuel - Unwanted Material (Debris) In The Left (Right) Wing-Tank (Outboard of the Rib2) |
| TSM TASK 28-11-00-810-810-A | Fuel - Unwanted Material (Debris) In The Center-Tank Fuel Installation |
| AMM 28-11-00-200-001 | Check for Full and Free Movement of Clack Valves |
| AMM 28-11-00-600-003 | Removal of Microbiological Particles |
| AMM 28-21-00-280-001 | Check Suction Valves For Full and Free Movement |
| AMM 28-21-42-000-001 | Removal of the Fuel-Pump Suction Valve |
| AMM 28-21-42-400-001 | Installation of the Fuel-Pump Suction Valve |
| AMM 28-21-51-000-001 | Removal of the Fuel Pumps |
| AMM 28-21-51-400-001 | Installation of the Fuel Pumps |
| AMM 28-21-52-000-001 | Removal of the Fuel Pump Canister |
| AMM 28-21-52-400-001 | Installation of the Fuel Pump Canister |
| AMM 28-21-54-000-001 | Removal of the Fuel Pump Strainer |
| AMM 28-21-54-400-001 | Installation of the Fuel Pump Strainer |
| AMM 28-26-00-210-001 | Manually Operate the Transfer System Discharge Check Valve on RIB1 and Check For Full and Free Movement |
| AMM 28-26-44-000-001 | Removal of the Main-Transfer-System Clack Valve |
| AMM 28-26-44-400-001 | Installation of the Main-Transfer-System Clack Valve |
| AMM 28-42-15-000-001 | Removal of the Wing Tank Fuel-Quantity-Probes |
| AMM 28-42-15-000-005 | Removal of the Wing Tank Fuel-Quantity Probes |
Subtask 28-11-00-710-058-A
A. Test
(1) No test is applicable.
You have found unwanted material (debris).
4. Fault Isolation(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:
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. - 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.
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.
Subtask 28-11-00-810-057-A ** ON A/C NOT FOR ALL
A. Procedure
(1) Do a visual (or complete the) inspection of the fuel-pump and the inside of its related canister (at the original location) for signs of:
Make sure that good lighting is available.
(a) Install a serviceable fuel-pump AMM 28-21-51-400-001.
(b) Continue with your original AMM/TSM Task or, if applicable, return the aircraft to service.
(3) Do the steps that follow:
(a) Remove the second fuel-pump in the same collector-cell AMM 28-21-51-000-001.
(b) At the second location, do a visual inpection of the fuel-pump and canister as given in step (1).
1 If:
(a) Install the serviceable fuel-pump AMM 28-21-51-400-001 at the second location.
(b) At the first location.
1 Remove all the unwanted material/debris at the fuel-pump and/or canister.
2 Replace the damaged/unserviceable fuel-pump AMM 28-21-51-000-001 AMM 28-21-51-400-001 and/or canister AMM 28-21-52-000-001 AMM 28-21-52-400-001.
3 Get access to the related fuel-pump strainer AMM 28-21-54-000-001.
4 Do a visual inspection of the fuel-pump strainer and look for unwanted material.
5 If found, remove all the unwanted material.
6 If the fuel-pump strainer is found to be unserviceable, replace it AMM 28-21-54-000-001 and AMM 28-21-54-400-001.
(c) Continue with your original AMM/TSM Task or, if applicable, return the aircraft to service.
(5) Do the steps that follow:
(a) Remove all the unwanted material/debris at each fuel-pump and/or canister.
(b) Replace all the damaged/unserviceable fuel-pumps AMM 28-21-51-000-001 AMM 28-21-51-400-001 and/or canisters AMM 28-21-52-000-001 AMM 28-21-52-400-001.
(c) Go to step (6).
(6) Because unwanted material was found at each of the fuel-pump locations (during steps (1) and (3)) more troubleshooting steps are necessary. These steps are to find (and remove) the possible source of the unwanted material. This will stop (or reduce) the possible ingestion of more unwanted material from the related collector cell area.
(a) Do the steps that follow (at the applicable wing):
(b) Get access to the out-board side of Rib2, to the tank floor and adjacent to the clack valves AMM 28-11-00-200-001.
1 Do a visual inspection for unwanted material.
a If:
(a) Remove the unwanted material found outboard of Rib2.
(b) Do all of the items in step (8).
(c) Do the TSM procedure (Ref. TSM TASK 28-11-00-810-809).
(8) Do the steps that follow:
(a) Get access to the related fuel-pump strainers AMM 28-21-54-000-001.
1 Do a visual inspection of the fuel-pump strainers and look for unwanted material.
2 If found, remove all the unwanted material.
3 If the fuel-pump strainers are found to be unserviceable, replace them AMM 28-21-54-000-001 and AMM 28-21-54-400-001.
(b) Get access to the suction valve intake AMM 28-21-00-280-001.
1 Do a visual inspection, at the suction valve input, for unwanted material and remove if found.
2 Make sure that the clack valve in the suction valve can:
(c) Get access to the fuel quantity probes 21QT1(2) and 22QT1(2) AMM 28-42-15-000-001.
1 Do a visual inspection in the areas that follow for unwanted material:
(d) Continue with your original AMM/TSM Task or, if applicable, return the aircraft to service.
Subtask 28-11-00-810-057-B ** ON A/C NOT FOR ALL (1) Do a visual (or complete the) inspection of the fuel-pump and the inside of its related canister (at the original location) for signs of:
- unwanted material
- possible damaged caused by unwanted material.
Make sure that good lighting is available.
NOTE: Damage Definitions.
Fuel-pump possible damage could be one of the items that follow:
Canister possible damage could be one of the items that follow (to the internal surface of the canister, the slide and the interface surface with pump):
(a) If: Fuel-pump possible damage could be one of the items that follow:
- distortion and marring
- wear, cracks, burrs, scores
- corrosion
- erosion of the impeller.
Canister possible damage could be one of the items that follow (to the internal surface of the canister, the slide and the interface surface with pump):
- distortion and marring
- wear, cracks, burrs, scores
- corrosion.
- no unwanted material or damaged is found, do step (2)
- unwanted material and/or damage is found, do step (3).
(a) Install a serviceable fuel-pump AMM 28-21-51-400-001.
(b) Continue with your original AMM/TSM Task or, if applicable, return the aircraft to service.
(3) Do the steps that follow:
(a) Remove the second fuel-pump in the same collector-cell AMM 28-21-51-000-001.
(b) At the second location, do a visual inpection of the fuel-pump and canister as given in step (1).
1 If:
- no unwanted material or damaged is found, do step (4)
- unwanted material and/or damage is found, do step (5).
(a) Install the serviceable fuel-pump AMM 28-21-51-400-001 at the second location.
(b) At the first location.
1 Remove all the unwanted material/debris at the fuel-pump and/or canister.
2 Replace the damaged/unserviceable fuel-pump AMM 28-21-51-000-001 AMM 28-21-51-400-001 and/or canister AMM 28-21-52-000-001 AMM 28-21-52-400-001.
3 Get access to the related fuel-pump strainer AMM 28-21-54-000-001.
4 Do a visual inspection of the fuel-pump strainer and look for unwanted material.
5 If found, remove all the unwanted material.
6 If the fuel-pump strainer is found to be unserviceable, replace it AMM 28-21-54-000-001 and AMM 28-21-54-400-001.
(c) Continue with your original AMM/TSM Task or, if applicable, return the aircraft to service.
(5) Do the steps that follow:
(a) Remove all the unwanted material/debris at each fuel-pump and/or canister.
(b) Replace all the damaged/unserviceable fuel-pumps AMM 28-21-51-000-001 AMM 28-21-51-400-001 and/or canisters AMM 28-21-52-000-001 AMM 28-21-52-400-001.
(c) Go to step (6).
(6) Because unwanted material was found at each of the fuel-pump locations (during steps (1) and (3)) more troubleshooting steps are necessary. These steps are to find (and remove) the possible source of the unwanted material. This will stop (or reduce) the possible ingestion of more unwanted material from the related collector cell area.
(a) Do the steps that follow (at the applicable wing):
(b) Get access to the out-board side of Rib2, to the tank floor and adjacent to the clack valves AMM 28-11-00-200-001.
1 Do a visual inspection for unwanted material.
a If:
- no unwanted material is found, do step (8)
- unwanted material is found, do step (7).
(a) Remove the unwanted material found outboard of Rib2.
(b) Do all of the items in step (8).
(c) Do the TSM procedure (Ref. TSM TASK 28-11-00-810-809).
(8) Do the steps that follow:
(a) Get access to the related fuel-pump strainers AMM 28-21-54-000-001.
1 Do a visual inspection of the fuel-pump strainers and look for unwanted material.
2 If found, remove all the unwanted material.
3 If the fuel-pump strainers are found to be unserviceable, replace them AMM 28-21-54-000-001 and AMM 28-21-54-400-001.
(b) Get access to the suction valve intake AMM 28-21-00-280-001.
1 Do a visual inspection, at the suction valve input, for unwanted material and remove if found.
2 Make sure that the clack valve in the suction valve can:
- move through its full travel
- fully close against the valve seat.
(c) Get access to the fuel quantity probes 21QT1(2) and 22QT1(2) AMM 28-42-15-000-001.
1 Do a visual inspection in the areas that follow for unwanted material:
- the probe support brakets
- the cable harness 13QT1(2) to fuel-probe 21QT1(2) connections
- the cable harness 14QT1(2) to fuel-probe 22QT1(2) connections
- the tank floor directly below the probes.
(d) Continue with your original AMM/TSM Task or, if applicable, return the aircraft to service.
A. Procedure
(1) Do a visual (or complete the) inspection of the fuel-pump and the inside of its related canister (at the original location) for signs of:
Make sure that good lighting is available.
(a) Install a serviceable fuel-pump AMM 28-21-51-400-001.
(b) Continue with your original AMM/TSM Task or, if applicable, return the aircraft to service.
(3) Do the steps that follow:
(a) Remove the second fuel-pump in the same collector-cell AMM 28-21-51-000-001.
(b) At the second location, do a visual inpection of the fuel-pump and canister as given in step (1).
1 If:
(a) Install the serviceable fuel-pump AMM 28-21-51-400-001 at the second location.
(b) At the first location.
1 Remove all the unwanted material/debris at the fuel-pump and/or canister.
2 Replace the damaged/unserviceable fuel-pump AMM 28-21-51-000-001 AMM 28-21-51-400-001 and/or canister AMM 28-21-52-000-001 AMM 28-21-52-400-001.
3 Get access to the related fuel-pump strainer AMM 28-21-54-000-001.
4 Do a visual inspection of the fuel-pump strainer and look for unwanted material.
5 If found, remove all the unwanted material.
6 If the fuel-pump strainer is found to be unserviceable, replace it AMM 28-21-54-000-001 and AMM 28-21-54-400-001.
(c) Continue with your original AMM/TSM Task or, if applicable, return the aircraft to service.
(5) Do the steps that follow:
(a) Remove all the unwanted material/debris at each fuel-pump and/or canister.
(b) Replace all the damaged/unserviceable fuel-pumps AMM 28-21-51-000-001 AMM 28-21-51-400-001 and/or canisters AMM 28-21-51-400-001 AMM 28-21-52-400-001.
(c) Go to step (6).
(6) Because unwanted material was found at each of the fuel-pump locations (during steps (1) and (3)) more troubleshooting steps are necessary. These steps are to find (and remove) the possible source of the unwanted material. This will stop (or reduce) the possible ingestion of more unwanted material from the related collector cell area.
(a) Do the steps that follow (at the applicable wing):
(b) Get access to the out-board side of Rib2, to the tank floor and adjacent to the clack valves AMM 28-11-00-200-001.
1 Do a visual inspection for unwanted material.
a If:
(a) Remove the unwanted material found outboard of Rib2.
(b) Do all of the items in step (8).
(c) Do the TSM procedure (Ref. TSM TASK 28-11-00-810-809).
(8) Do the steps that follow:
(a) Get access to the related fuel-pump strainers AMM 28-21-54-000-001.
1 Do a visual inspection of the fuel-pump strainers and look for unwanted material.
2 If found, remove all the unwanted material.
3 If the fuel-pump strainers are found to be unserviceable, replace them AMM 28-21-54-000-001 and AMM 28-21-54-400-001.
(b) Get access to the suction valve intake AMM 28-21-00-280-001.
1 Do a visual inspection, at the suction valve input, for unwanted material and remove if found.
2 Make sure that the clack valve in the suction valve can:
(c) Get access to the fuel quantity probes 21QT1(2) and 54QT1(2) AMM 28-42-15-000-005.
1 Do a visual inspection in the areas that follow for unwanted material:
(d) Get access to the main transfer system discharge check-valve on the outboard side of the Rib1 AMM 28-26-00-210-001.
1 Do a visual inspection of the check valve and the discharge area of the adjacent collector-cell floor for unwanted material.
a If:
(a) Remove all the unwanted material from the check valve and discharge area of the adjacent cell floor.
(b) If necessary, remove and re-install the check valve AMM 28-26-44-000-001 and AMM 28-26-44-400-001.
(c) Do the procedure for Unwanted Material In The Center-Tank Fuel Installation (Ref. TSM TASK 28-11-00-810-810).
(d) Do step (10).
(10) Continue with your original AMM/TSM Task or, if applicable, return the aircraft to service.
Subtask 28-11-00-810-057-C ** ON A/C NOT FOR ALL (1) Do a visual (or complete the) inspection of the fuel-pump and the inside of its related canister (at the original location) for signs of:
- unwanted material
- possible damaged caused by unwanted material.
Make sure that good lighting is available.
NOTE: Damage Definitions.
Fuel-pump possible damage could be one of the items that follow:
Canister possible damage could be one of the items that follow (to the internal surface of the canister, the slide and the interface surface with pump):
(a) If: Fuel-pump possible damage could be one of the items that follow:
- distortion and marring
- wear, cracks, burrs, scores
- corrosion
- erosion of the impeller.
Canister possible damage could be one of the items that follow (to the internal surface of the canister, the slide and the interface surface with pump):
- distortion and marring
- wear, cracks, burrs, scores
- corrosion.
- no unwanted material or damaged is found, do step (2)
- unwanted material and/or damage is found, do step (3).
(a) Install a serviceable fuel-pump AMM 28-21-51-400-001.
(b) Continue with your original AMM/TSM Task or, if applicable, return the aircraft to service.
(3) Do the steps that follow:
(a) Remove the second fuel-pump in the same collector-cell AMM 28-21-51-000-001.
(b) At the second location, do a visual inpection of the fuel-pump and canister as given in step (1).
1 If:
- no unwanted material or damaged is found, do step (4)
- unwanted material and/or damage is found, do step (5).
(a) Install the serviceable fuel-pump AMM 28-21-51-400-001 at the second location.
(b) At the first location.
1 Remove all the unwanted material/debris at the fuel-pump and/or canister.
2 Replace the damaged/unserviceable fuel-pump AMM 28-21-51-000-001 AMM 28-21-51-400-001 and/or canister AMM 28-21-52-000-001 AMM 28-21-52-400-001.
3 Get access to the related fuel-pump strainer AMM 28-21-54-000-001.
4 Do a visual inspection of the fuel-pump strainer and look for unwanted material.
5 If found, remove all the unwanted material.
6 If the fuel-pump strainer is found to be unserviceable, replace it AMM 28-21-54-000-001 and AMM 28-21-54-400-001.
(c) Continue with your original AMM/TSM Task or, if applicable, return the aircraft to service.
(5) Do the steps that follow:
(a) Remove all the unwanted material/debris at each fuel-pump and/or canister.
(b) Replace all the damaged/unserviceable fuel-pumps AMM 28-21-51-000-001 AMM 28-21-51-400-001 and/or canisters AMM 28-21-51-400-001 AMM 28-21-52-400-001.
(c) Go to step (6).
(6) Because unwanted material was found at each of the fuel-pump locations (during steps (1) and (3)) more troubleshooting steps are necessary. These steps are to find (and remove) the possible source of the unwanted material. This will stop (or reduce) the possible ingestion of more unwanted material from the related collector cell area.
(a) Do the steps that follow (at the applicable wing):
(b) Get access to the out-board side of Rib2, to the tank floor and adjacent to the clack valves AMM 28-11-00-200-001.
1 Do a visual inspection for unwanted material.
a If:
- no unwanted material is found, do step (8)
- unwanted material is found, do step (7).
(a) Remove the unwanted material found outboard of Rib2.
(b) Do all of the items in step (8).
(c) Do the TSM procedure (Ref. TSM TASK 28-11-00-810-809).
(8) Do the steps that follow:
(a) Get access to the related fuel-pump strainers AMM 28-21-54-000-001.
1 Do a visual inspection of the fuel-pump strainers and look for unwanted material.
2 If found, remove all the unwanted material.
3 If the fuel-pump strainers are found to be unserviceable, replace them AMM 28-21-54-000-001 and AMM 28-21-54-400-001.
(b) Get access to the suction valve intake AMM 28-21-00-280-001.
1 Do a visual inspection, at the suction valve input, for unwanted material and remove if found.
2 Make sure that the clack valve in the suction valve can:
- move through its full travel
- fully close against the valve seat.
(c) Get access to the fuel quantity probes 21QT1(2) and 54QT1(2) AMM 28-42-15-000-005.
1 Do a visual inspection in the areas that follow for unwanted material:
- the probe support brakets
- the cable harness 57QT(58QT) to fuel-probe 21QT1 and 54QT1(21QT2 and 54QT2) connections
- the cable harness 63QT(64QT) to fuel-probe 54QT1(2) connections
- the tank floor directly below the probes.
(d) Get access to the main transfer system discharge check-valve on the outboard side of the Rib1 AMM 28-26-00-210-001.
1 Do a visual inspection of the check valve and the discharge area of the adjacent collector-cell floor for unwanted material.
a If:
- unwanted material is found, do step (9)
- no unwanted material is found, do step (10).
(a) Remove all the unwanted material from the check valve and discharge area of the adjacent cell floor.
(b) If necessary, remove and re-install the check valve AMM 28-26-44-000-001 and AMM 28-26-44-400-001.
(c) Do the procedure for Unwanted Material In The Center-Tank Fuel Installation (Ref. TSM TASK 28-11-00-810-810).
(d) Do step (10).
(10) Continue with your original AMM/TSM Task or, if applicable, return the aircraft to service.
A. Procedure
(1) Do a visual (or complete the) inspection of the fuel-pump and the inside of its related canister (at the original location) for signs of:
Make sure that good lighting is available.
(a) Install a serviceable fuel-pump AMM 28-21-51-400-001.
(b) Continue with your original AMM/TSM Task or, if applicable, return the aircraft to service.
(3) Do the steps that follow:
(a) Remove the second fuel-pump in the same collector-cell AMM 28-21-51-000-001.
(b) At the second location, do a visual inpection of the fuel-pump and canister as given in step (1).
1 If:
(a) Install the serviceable fuel-pump AMM 28-21-51-400-001 at the second location.
(b) At the first location.
1 Remove all the unwanted material/debris at the fuel-pump and/or canister.
2 Replace the damaged/unserviceable fuel-pump AMM 28-21-51-000-001 AMM 28-21-51-400-001 and/or canister AMM 28-21-52-000-001 AMM 28-21-52-400-001.
3 Get access to the related fuel-pump strainer AMM 28-21-54-000-001.
4 Do a visual inspection of the fuel-pump strainer and look for unwanted material.
5 If found, remove all the unwanted material.
6 If the fuel-pump strainer is found to be unserviceable, replace it AMM 28-21-54-000-001 and AMM 28-21-54-400-001.
(c) Continue with your original AMM/TSM Task or, if applicable, return the aircraft to service.
(5) Do the steps that follow:
(a) Remove all the unwanted material/debris at each fuel-pump and/or canister.
(b) Replace all the damaged/unserviceable fuel-pumps AMM 28-21-51-000-001 AMM 28-21-51-400-001 and/or canisters AMM 28-21-52-000-001 AMM 28-21-52-400-001.
(c) Go to step (6).
(6) Because unwanted material was found at each of the fuel-pump locations (during steps (1) and (3)) more troubleshooting steps are necessary. These steps are to find (and remove) the possible source of the unwanted material. This will stop (or reduce) the possible ingestion of more unwanted material from the related collector cell area.
(a) Do the steps that follow (at the applicable wing):
(b) Get access to the out-board side of Rib2, to the tank floor and adjacent to the clack valves AMM 28-11-00-200-001.
1 Do a visual inspection for unwanted material.
a If:
(a) Remove the unwanted material found outboard of Rib2.
(b) Do all of the items in step (8).
(c) Do the TSM procedure (Ref. TSM TASK 28-11-00-810-809).
(8) Do the steps that follow:
(a) Get access to the related fuel-pump strainers AMM 28-21-54-000-001.
1 Do a visual inspection of the fuel-pump strainers and look for unwanted material.
2 If found, remove all the unwanted material.
3 If the fuel-pump strainers are found to be unserviceable, replace them AMM 28-21-54-000-001 and AMM 28-21-54-400-001.
(b) Get access to the suction valve intake AMM 28-21-00-280-001.
1 Do a visual inspection, at the suction valve input, for unwanted material and remove if found.
2 Make sure that the clack valve in the suction valve can:
(c) Get access to the fuel quantity probes 21QT1(2) and 92QT1(2) AMM 28-42-15-000-001.
1 Do a visual inspection in the areas that follow for unwanted material:
(d) Continue with your original AMM/TSM Task or, if applicable, return the aircraft to service.
(1) Do a visual (or complete the) inspection of the fuel-pump and the inside of its related canister (at the original location) for signs of:
- unwanted material
- possible damaged caused by unwanted material.
Make sure that good lighting is available.
NOTE: Damage Definitions.
Fuel-pump possible damage could be one of the items that follow:
Canister possible damage could be one of the items that follow (to the internal surface of the canister, the slide and the interface surface with pump):
(a) If: Fuel-pump possible damage could be one of the items that follow:
- distortion and marring
- wear, cracks, burrs, scores
- corrosion
- erosion of the impeller.
Canister possible damage could be one of the items that follow (to the internal surface of the canister, the slide and the interface surface with pump):
- distortion and marring
- wear, cracks, burrs, scores
- corrosion.
- no unwanted material or damaged is found, do step (2)
- unwanted material and/or damage is found, do step (3).
(a) Install a serviceable fuel-pump AMM 28-21-51-400-001.
(b) Continue with your original AMM/TSM Task or, if applicable, return the aircraft to service.
(3) Do the steps that follow:
(a) Remove the second fuel-pump in the same collector-cell AMM 28-21-51-000-001.
(b) At the second location, do a visual inpection of the fuel-pump and canister as given in step (1).
1 If:
- no unwanted material or damaged is found, do step (4)
- unwanted material and/or damage is found, do step (5).
(a) Install the serviceable fuel-pump AMM 28-21-51-400-001 at the second location.
(b) At the first location.
1 Remove all the unwanted material/debris at the fuel-pump and/or canister.
2 Replace the damaged/unserviceable fuel-pump AMM 28-21-51-000-001 AMM 28-21-51-400-001 and/or canister AMM 28-21-52-000-001 AMM 28-21-52-400-001.
3 Get access to the related fuel-pump strainer AMM 28-21-54-000-001.
4 Do a visual inspection of the fuel-pump strainer and look for unwanted material.
5 If found, remove all the unwanted material.
6 If the fuel-pump strainer is found to be unserviceable, replace it AMM 28-21-54-000-001 and AMM 28-21-54-400-001.
(c) Continue with your original AMM/TSM Task or, if applicable, return the aircraft to service.
(5) Do the steps that follow:
(a) Remove all the unwanted material/debris at each fuel-pump and/or canister.
(b) Replace all the damaged/unserviceable fuel-pumps AMM 28-21-51-000-001 AMM 28-21-51-400-001 and/or canisters AMM 28-21-52-000-001 AMM 28-21-52-400-001.
(c) Go to step (6).
(6) Because unwanted material was found at each of the fuel-pump locations (during steps (1) and (3)) more troubleshooting steps are necessary. These steps are to find (and remove) the possible source of the unwanted material. This will stop (or reduce) the possible ingestion of more unwanted material from the related collector cell area.
(a) Do the steps that follow (at the applicable wing):
(b) Get access to the out-board side of Rib2, to the tank floor and adjacent to the clack valves AMM 28-11-00-200-001.
1 Do a visual inspection for unwanted material.
a If:
- no unwanted material is found, do step (8)
- unwanted material is found, do step (7).
(a) Remove the unwanted material found outboard of Rib2.
(b) Do all of the items in step (8).
(c) Do the TSM procedure (Ref. TSM TASK 28-11-00-810-809).
(8) Do the steps that follow:
(a) Get access to the related fuel-pump strainers AMM 28-21-54-000-001.
1 Do a visual inspection of the fuel-pump strainers and look for unwanted material.
2 If found, remove all the unwanted material.
3 If the fuel-pump strainers are found to be unserviceable, replace them AMM 28-21-54-000-001 and AMM 28-21-54-400-001.
(b) Get access to the suction valve intake AMM 28-21-00-280-001.
1 Do a visual inspection, at the suction valve input, for unwanted material and remove if found.
2 Make sure that the clack valve in the suction valve can:
- move through its full travel
- fully close against the valve seat.
(c) Get access to the fuel quantity probes 21QT1(2) and 92QT1(2) AMM 28-42-15-000-001.
1 Do a visual inspection in the areas that follow for unwanted material:
- the probe support brakets
- the cable harness 13QT1(2) to fuel-probe 21QT1(2) connections
- the cable harness 14QT1(2) to fuel-probe 92QT1(2) connections
- the tank floor directly below the probes.
(d) Continue with your original AMM/TSM Task or, if applicable, return the aircraft to service.