W DOC AIRBUS | AMM A320F

Drain Water Content

TASK 12-32-28-281-001-A
Drain Water Content

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
ZONE: 500
ZONE: 600
1. Reason for the Job
Refer to the MPD TASK: 281100-01
DRAIN WATER CONTENT

You can do this task together with TASK 12-32-28-281-003-A (Sample Fuel for Microbiological Contamination Analysis) and TASK 12-32-28-281-802-A (Sample Fuel for Hydraulic-Oil Contamination Analysis). If you are sampling for microbiological contamination of fuel do task 12-32-28-281-003-A instead of this task. If you do the Microbiological/Hydraulic-Oil Contamination Analysis, you must clean the applicable drain tool and the container as given in the AMM tasks.
NOTE: If possible, Airbus recommends you to do the water drain procedure before the flight or the refuel procedure. If you do this procedure after the flight or the refuel procedure, you must wait for one hour for the separation of the water and the fuel.
NOTE: It is permitted to do this procedure when the APU is in operation only if the fuel tank pumps are set to OFF.

For the gravity procedure, Airbus recommends that there must be more than 10% content of the fuel in each tank.
If you have less than 10% content of the fuel, then the indirect water drain valves will have a decreased flow.
It is recommended that you use the suction procedure when you have less than 10% content of the fuel.
2. Job Set-up Information
 A. Fixtures, Tools, Test and Support Equipment
REFERENCE
QTY
DESIGNATION
No specific
AR
CONTAINER 10 L(2 1/2 USGAL)
No specific
1
CONTAINER-CLEAN, STERILIZED, TRANSPARENT GLASS
No specific
1
CONTAINER-FUEL RESISTANT, TRANSPARENT PLASTIC
No specific
AR
HYDROKIT
No specific
1
PUMP - SUCTION (ATEX APPROVED)
No specific
AR
SAFETY BARRIER(S)
No specific
AR
WARNING NOTICE(S)
97A28002117002
1
TOOL-PURGING
98A28101000000
1
ADAPTING PIPE - WATER DRAINING FROM FUEL
98A28104000000
1
PURGER - WATER DRAIN
98A28104000002
1
TOOL - PURGING
98A28104031001
1
WATER DRAIN PURGER
98D28104000000
1
PIPE ADAPTING-WATER DRAINING
 B. Work Zones and Access Panels
ZONE/ACCESS
ZONE DESCRIPTION
190
BELLY FAIR, AIR CONDITIONING & HYD COMPT
500
LEFT WING
600
RIGHT WING
195BB, 196BB
 C. Referenced Information
REFERENCE
DESIGNATION
TASK 12-31-28-660-001-A
Cold Weather Maintenance - Fuel
TASK 12-32-28-281-003-A
Sample Fuel for Microbiological Contamination Analysis
TASK 28-00-00-910-001-A
Fuel Safety Procedures
F Fuel Sampling For Analysis ** ON A/C NOT FOR ALL
F Fuel Sampling For Analysis ** ON A/C NOT FOR ALL
F Fuel Sampling For Analysis - Suction Procedure ** ON A/C NOT FOR ALL
F Fuel Sampling For Analysis - Suction Procedure ** ON A/C NOT FOR ALL
3. Job Set-up
Subtask 12-32-28-941-054-B
A. Safety Precautions
WARNING: OBEY THE FUEL SAFETY PROCEDURES.
   (1) You must obey the fuel safety procedures when you do work on the fuel system (Ref. AMM TASK 28-00-00-910-001).
   (2) As necessary, use the applicable SAFETY BARRIERS, specified by the operator's instructions and your local regulations.
   (3) In the cockpit, on panel 400VU:
  • Make sure that the landing-gear control-lever 6GA is in the DOWN position
  • Put the WARNING NOTICE(S) in position to tell persons not to operate the landing gear.
   (4) Put the WARNING NOTICE(S) in position to tell persons not to operate the landing gear doors.
   (5) If the fuel temperature is less than 0 DEG.C (32.00 DEG.F) and/or the water drain valves are frozen, to keep the flight turnaround times, one of the two steps that follow:
  • Do the cold weather maintenance procedure to warm the water drain valve (Ref. AMM TASK 12-31-28-660-001)
  • Remove the fuel samples 60 minutes after the refuel procedure.
NOTE: Removal of the fuel samples in less than 60 minutes will not remove the water content as satisfactorily as samples removed one hour after the refuel procedure.
NOTE: Airbus recommends you that not to apply unusually high force to open the water drain valve.
   (6) If the APU is in operation during this procedure, you must make sure that the fuel tank pumps are set to OFF.
Subtask 12-32-28-010-050-B
B. Get Access
   (1) For access to the center tank water drain valves, open the applicable access panels:
  • For water drain valve 94QM, open access panel 195BB
  • For water drain valve 95QM, open access panel 196BB.
Subtask 12-32-28-480-050-A
C. Preparation of the Equipment
   (1) To get access to the high water drain valves from the ground, attach the:
4. Procedure
Subtask 12-32-28-281-050-B
A. Fuel Sampling for Water Contamination
   (1) Gravity Procedure:
     (a) Make sure that the fuel tanks are filled to a minimum of 10% of capacity. This is necessary to cover the water drain valve outlet, so that the water drain valves can operate satisfactorily.
     (b) For the wing-tank water drain-valves:
CAUTION: MAKE SURE THAT THE PLUNGER OF THE TOOL ALIGNS CORRECTLY WITH THE WATER DRAIN VALVE. INCORRECT ALIGNMENT OF THE TOOL CAN CAUSE:
  • THE WATER DRAIN VALVE TO STAY IN THE OPEN POSITION AFTER THE TOOL IS REMOVED
  • A FUEL LEAK.
       1 Push the center of the applicable water drain valve with the 98A28104000000 PURGER - WATER DRAIN:
         a Drain approximately 1.0 l (0.26 USgal) of fuel from the water drain valve.
       2 Remove the 98A28104000000 PURGER - WATER DRAIN from the water drain valve.
     (c) For the center-tank water drain-valves:
       1 Push the center of the applicable water drain valve with the 98A28104000002 TOOL - PURGING:
         a Drain approximately 1.0 l (0.26 USgal) of fuel from the water drain valve.
       2 Remove the 98A28104000002 TOOL - PURGING from the water drain valve.
       3 Examine the water drain valve for fuel leakage:
         a If the water drain valve does leak, use the 98A28104000002 TOOL - PURGING to push (in) and release (out) the center of the valve three or four times.
         b Make sure that there are no leaks.
         c This step is very important at center-tank water-drain-valves 94QM and 95QM, where access is not easy.
     (d) Put the fuel sample into a CONTAINER-CLEAN, STERILIZED, TRANSPARENT GLASS or CONTAINER-FUEL RESISTANT, TRANSPARENT PLASTIC. If you do not do the analysis immediately, seal the container:
       1 Airbus recommends that the test for microbiological contamination should be done in less than 10 days, if:
     (e) Do the sample removal procedure at all the water drain valves.
   (2) Suction Procedure:
     (a) If you use the 97A28002117002 TOOL-PURGING, do the steps that follow:
       1 You must use an approved type of PUMP - SUCTION (ATEX APPROVED) for use on a fuel system:
         a You must obey the applicable safety precautions.
       2 On the 97A28002117002 TOOL-PURGING fully retract the nut (5), the screw (4) and the plunger assembly (1).
CAUTION: MAKE SURE THAT THE PLUNGER OF THE TOOL ALIGNS CORRECTLY WITH THE WATER DRAIN VALVE. INCORRECT ALIGNMENT OF THE TOOL CAN CAUSE:
  • THE WATER DRAIN VALVE TO STAY IN THE OPEN POSITION AFTER THE TOOL IS REMOVED
  • A FUEL LEAK.
       3 Put the hexagonal end of the bush (2) into the bottom of the water drain valve.
       4 Turn the bush (2) through 30 deg (30 deg).
       5 Turn the nut (5) until it touches and seals against the bottom skin.
       6 Attach the PUMP - SUCTION (ATEX APPROVED) to the hose (3).
       7 Put the outlet of the PUMP - SUCTION (ATEX APPROVED) to the CONTAINER 10 L(2 1/2 USGAL).
       8 Hold the bush (2) and turn the screw (4) clockwise to its stop:
         a This causes the plunger (1) to open the drain valve. Fuel can now flow into the PUMP - SUCTION (ATEX APPROVED).
       9 Start the PUMP - SUCTION (ATEX APPROVED).
       10 Continuously monitor the fuel flow into the CONTAINER 10 L(2 1/2 USGAL).
       11 Drain approximately 1.0 l (0.26 USgal) of fuel (as a sample) from the drain valve.
       12 When you drained sufficient fuel sample, turn the screw (4) counter clockwise to its stop.
       13 Stop the PUMP - SUCTION (ATEX APPROVED).
       14 Remove the PUMP - SUCTION (ATEX APPROVED) from the hose (3).
       15 Turn the nut (5) until it does not touch the bottom skin.
       16 Turn the hexagonal end of the bush (2) 30 deg (30 deg):
         a Remove the 97A28002117002 TOOL-PURGING from the bottom of the water drain valve.
       17 Examine the water drain valve for leaks:
         a Airbus recommends that the test for microbiological contamination should be done in less than 10 days, if:
       18 Do this procedure at all of the water drain valves.
     (b) If you use the 98A28104031001 WATER DRAIN PURGER, do the steps that follow:
CAUTION: MAKE SURE THAT THE PLUNGER OF THE TOOL ALIGNS CORRECTLY WITH THE WATER DRAIN VALVE. INCORRECT ALIGNMENT OF THE TOOL CAN CAUSE:
  • THE WATER DRAIN VALVE TO STAY IN THE OPEN POSITION AFTER THE TOOL IS REMOVED
  • A FUEL LEAK.
       1 Push the center of the applicable water drain valve with the 98A28104031001 WATER DRAIN PURGER.
       2 Operate the 98A28104031001 WATER DRAIN PURGER and collect approximately 1 l (0.26 USgal) of fuel (as a sample) from the drain valve.
       3 Continue to operate the water drain valve until only fuel comes out.
       4 Remove the 98A28104031001 WATER DRAIN PURGER from the water drain valve.
       5 Examine the water drain valve for fuel leakage:
         a If the water drain valve does leak, use the 98A28104031001 WATER DRAIN PURGER to push (in) and release (out) the center of the valve three or four times.
         b Make sure that there are no leaks.
       6 Do this procedure at all the water drain valves.
Subtask 12-32-28-750-050-A
B. Water Contamination Test
   (1) Let the sample become stable:
     (a) Airbus recommends that you do the test for microbiological contamination in less than 10 days, if:
     (b) If the sample moves into two layers it contains water. Continue to drain from the water drain valve until it has no water.
WARNING: DO THE TEST ONLY IN AN APPROVED AREA. THIS WILL HELP TO PREVENT CONTAMINATION AND EXPLOSIONS.
WARNING: DO THE TEST ONLY IN AN APPROVED AREA. THIS WILL HELP TO PREVENT CONTAMINATION AND EXPLOSIONS.
     (c) If the sample stays in one layer, it can be all fuel or all water. To find if the sample is fuel or water, do the test that follows:

If you test for microbiological contamination, do not use a HYDROKIT or put any other additive in the fuel (except water).
ACTION
RESULT
1.If you have a HYDROKIT available put the contents into the sample.
  • If the powder stays white, the sample is fuel and the test is complete.
or
  • If the white powder changes color to purple, the sample is water.
  • Continue to take the samples and test it until the water drain valve has no water.
2.If you do not have a HYDROKIT available, add water to the sample.
  • If the sample moves into two layers, then the sample is all fuel and the test is complete.
or
  • If the sample stays in one layer, then the sample is water.
  • Continue to take the samples and test it until the water drain valve has no water.
NOTE: You can use the same procedure to do an analysis on a sample from a fuel tanker. You can remove the sample from the supply connector of the fuel tanker.
5. Close-up
Subtask 12-32-28-410-050-B
A. Close Access
   (1) Make sure that the work area is clean and clear of tools and other items.
   (2) Close the applicable access panels:
  • For water drain valve 94QM, close access panel 195BB
  • For water drain valve 95QM, close access panel 196BB.
Subtask 12-32-28-942-050-A
B. Removal of Equipment
   (1) Make sure that the work area is clean and clear of tools and other items.
NOTE: To discard the water samples, refer to the local regulations.
   (2) Remove the safety barriers.
   (3) Remove the WARNING NOTICE(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 03:56:35 UTC
"Aviabrain" 2025