W DOC AIRBUS | AMM A320F

Operational Check of Water Drain Valves

TASK 12-32-28-281-804-A
Operational Check of Water Drain Valves

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: 281100-06
OPERATIONAL CHECK OF WATER DRAIN VALVES
2. Job Set-up Information
 A. Fixtures, Tools, Test and Support Equipment
REFERENCE
QTY
DESIGNATION
No specific
AR
SAFETY BARRIER(S)
No specific
AR
WARNING NOTICE(S)
98A28101000000
1
ADAPTING PIPE - WATER DRAINING FROM FUEL
98A28104000000
1
PURGER - WATER DRAIN
98A28104000002
1
TOOL - PURGING
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 28-00-00-910-001-A
Fuel Safety Procedures
F Operation of the Water Drain Valves ** ON A/C NOT FOR ALL
F Operation of the Water Drain Valves ** ON A/C NOT FOR ALL
3. Job Set-up
Subtask 12-32-28-941-060-A
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) On panel 400VU:
  • Make sure that landing-gear control-lever 6GA is in the DOWN position
  • Put a warning notice 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:
NOTE: It is necessary not to apply unusually high force to open the water drain valve.
Subtask 12-32-28-010-084-A
B. Get Access
   (1) To get 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 12-32-28-480-057-A
C. Preparation of the Equipment
   (1) To get access to the high water drain valves from the ground, attach the:
4. Procedure
Subtask 12-32-28-281-068-A
A. Operational Check of 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) For the surge tank water-drain-valves:
     (a) Keep the surge tanks empty.
     (b) Push the center of the applicable water drain valve with the 98A28104000000 PURGER - WATER DRAIN:
  • Make sure that the water drain valve opens.
     (c) Remove the 98A28104000000 PURGER - WATER DRAIN from the water drain valve.
     (d) Do a visual check of the surge tank water-drain-valve to make sure that it is in full and free movement.
     (e) Do this procedure at all the water drain valves.
   (2) For the wing tank water-drain-valves:
NOTE: It is necessary to fill the fuel tanks to a minimum of 10% of capacity. This is to cover the water drain valve outlet, until the water drain valves operate satisfactorily.
     (a) Push the center of the applicable water drain valve with the 98A28104000000 PURGER - WATER DRAIN:
  • Make sure that the water drain valve opens.
NOTE: A rubber shield prevents fuel leakage.
     (b) Remove the 98A28104000000 PURGER - WATER DRAIN from the water drain valve.
     (c) Examine the water drain valve for leaks. If the valve has leaks, use the 98A28104000000 PURGER - WATER DRAIN to push (in) and release (out) the center of the valve three or four times. No leaks are permitted.
     (d) Do this procedure at all the water drain valves.
   (3) For the center tank water-drain-valves:
NOTE: It is necessary to fill the fuel tanks to a minimum of 10% of capacity. This is to cover the water drain valve outlet, until the water drain valves operate satisfactorily.
     (a) Push the center of the applicable water drain valve with the 98A28104000002 TOOL - PURGING:
  • Make sure that the water drain valve opens.
NOTE: A rubber shield prevents fuel leakage.
     (b) Remove the 98A28104000002 TOOL - PURGING from the water drain valve.
     (c) Examine the water drain valve for leaks. If the valve has leaks, use the 98A28104000002 TOOL - PURGING to push (in) and release (out) the center of the valve three or four times. No leaks are permitted.
NOTE: This step is very important at center tank water-drain-valves 94QM and 95QM, where access is not easy.
     (d) Do this procedure at all the water drain valves.
5. Close-up
Subtask 12-32-28-410-079-A
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 12-32-28-942-059-A
B. Removal of Equipment
   (1) Make sure that the work area is clean and clear of tools and other items.
   (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] 2026.04.02 06:10:36 UTC
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