Operate Water Drain Valves in Installed ACT(S) to Drain Accumulated Water

TASK 12-32-28-281-005-A
Operate Water Drain Valves in Installed ACT(S) to Drain Accumulated Water

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
FIN: 226QM1 ** ON A/C NOT FOR ALL
FIN: 226QM2 ** ON A/C NOT FOR ALL

1. Reason for the Job
Refer to the MPD TASK: 282800-03
OPERATE WATER DRAIN VALVES IN INSTALLED ACT(S) TO DRAIN ACCUMULATED WATER

NOTE: You can do this task together with TASK 12-32-28-281-003-A.

NOTE: If possible, do the water drain procedure before a refuel. Alternatively, you must wait for one hour after a refuel has been completed before you do the water drain procedure.

2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	CONTAINER 1.5 L (0.4 USGAL) MINIMUM - GRADUATED
No specific	AR	CONTAINER 3 L(3/4 USGAL)
No specific	AR	HYDROKIT
No specific	AR	PROBE - NON METALLIC, FLEXIBLE
No specific	AR	SAFETY BARRIER(S)
98D28108293001	1	ADAPTER-WATER DRAIN, ADDITIONAL CENTER TANK
98D28108293002	1	ADAPTER-WATER DRAIN, ADDITIONAL CENTER TANK

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
190	BELLY FAIR, AIR CONDITIONING & HYD COMPT
134AR, 153AZ, 197AB, 197GB

C. Referenced Information

REFERENCE	DESIGNATION
TASK 28-00-00-910-001-A	Fuel Safety Procedures
Fuel Sampling For Analysis ** ON A/C NOT FOR ALL
Fuel Sampling for Analysis ** ON A/C NOT FOR ALL

3. Job Set-up
Subtask 12-32-28-941-056-A ** ON A/C NOT FOR ALL

A. Safety Precautions

WARNING: OBEY THE FUEL SAFETY PROCEDURES.

(1) You must obey the fuel safety procedures (Ref. AMM TASK 28-00-00-910-001) when you do work on the fuel system.
(2) As necessary, use the applicable SAFETY BARRIERS, specified by the operator's instructions and your local regulations.
(3) 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:

use the aircraft air conditioning system to heat the ACT,
or
remove ice from inside the ACT with ambient air heat in a hangar,
or
remove the fuel samples 30 minutes after the refuel procedure.

NOTE: Fuel samples removed 1 hour after the refuel procedure remove water content more satisfactory than samples removed after 30 minutes.

NOTE: Do not apply unusually high force to open the water drain valve.

Subtask 12-32-28-941-057-A ** ON A/C NOT FOR ALL

B. Safety Precautions

WARNING: OBEY THE FUEL SAFETY PROCEDURES.

Use the aircraft air conditioning system to heat each ACT,
or
Remove ice from inside each ACT with ambient air heat in a hangar,
or
Remove the fuel samples 30 minutes after the refuel procedure.

NOTE: Fuel samples removed 1 hour after the refuel procedure remove water content more satisfactory than samples removed after 30 minutes.

NOTE: Do not apply unusually high force to open the water drain valve.

Subtask 12-32-28-010-056-B ** ON A/C NOT FOR ALL

C. Get Access
(1) Remove the applicable access panels:

If water drain valve 226QM1 is installed, remove 197AB and 153AZ
If water drain valve 226QM2 is installed, remove 197GB
If water drain valve 226QM4 is installed, remove 134AR.

Subtask 12-32-28-010-057-A ** ON A/C NOT FOR ALL

D. Get Access (If ACT1 Installed)
(1) Remove the applicable access panels:

for the water drain valve 174QM1, remove 198QB and 154AZ
for the water drain valve 175QM1, remove 154BR.

NOTE: It is necessary to remove panel 198QB to get access to panel 154AZ.

Subtask 12-32-28-010-057-B ** ON A/C NOT FOR ALL

D. Get Access (If ACT1 and ACT2 Installed)
(1) Remove the applicable access panels:

for the water drain valve 174QM1, remove 198QB and 154AZ
for the water drain valve 175QM1, remove 154BR
for the water drain valve 174QM2, remove 154DR
for the water drain valve 175QM2, remove 153BR.

NOTE: It is necessary to remove panel 198QB to get access to panel 154AZ.

4. Procedure
Subtask 12-32-28-281-057-A ** ON A/C NOT FOR ALL

A. Fuel Sampling for Water Contamination

Fuel Sampling For Analysis ** ON A/C NOT FOR ALL

(1) To get access to the ACT water drain-valves, attach the 98D28108293001 ADAPTER-WATER DRAIN, ADDITIONAL CENTER TANK as follows:
(a) Put the thrust rod (2) into the sleeve (1).
(b) Install the sleeve (1) in the water drain-valve tube.
(c) Hold the sleeve (1) and turn the nut (3) clockwise against the nut (4) to hold the water drain adapter in position.
(2) Put the CONTAINER 3 L(3/4 USGAL) below the applicable water drain valve in the correct position below the thrust rod (2).
(3) Use the PROBE - NON METALLIC, FLEXIBLE to lift the thrust rod (2) against the water drain valve and drain approximately 1.0 l (0.26 USgal) of fuel from the water drain valve.
(4) Remove the probe to close the water drain valve.
(5) Hold the sleeve (1) and turn the nut (3) counter-clockwise from the nut (4) to release the water drain adapter from the water drain-valve tube.
(6) Remove the thrust rod (2) from the sleeve (1).
(7) Examine the water drain valve for leakage:
(a) Make sure that there are no leaks.
(8) Put the fuel sample into a clean and sterilized CONTAINER 1.5 L (0.4 USGAL) MINIMUM - GRADUATED:
(a) If you do not do the analysis immediately, seal the container.

Subtask 12-32-28-281-057-B ** ON A/C NOT FOR ALL

A. Fuel Sampling for Water Contamination

Fuel Sampling for Analysis ** ON A/C NOT FOR ALL

(1) To get access to the ACT water drain-valves, attach the 98D28108293001 ADAPTER-WATER DRAIN, ADDITIONAL CENTER TANK or 98D28108293002 ADAPTER-WATER DRAIN, ADDITIONAL CENTER TANK as follows:
(a) Put the thrust rod (2) into the sleeve (1).
(b) Install the sleeve (1) in the water drain-valve tube.
(c) Hold the sleeve (1) and turn the nut (3) clockwise against the nut (4) to hold the water drain adapter in position.
(2) Put the CONTAINER 3 L(3/4 USGAL) below the applicable water drain valve in the correct position below the thrust rod (2).
(3) Use the PROBE - NON METALLIC, FLEXIBLE to lift the thrust rod (2) against the water drain valve and drain approximately 1.0 l (0.26 USgal) of fuel from the water drain valve.
(4) Remove the probe to close the water drain valve.
(5) Hold the sleeve (1) and turn the nut (3) counter-clockwise from the nut (4) to release the water drain adapter from the water drain-valve tube.
(6) Remove the thrust rod (2) from the sleeve (1).
(7) Examine the water drain valve for leakage:
(a) Make sure that there are no leaks.
(8) Put the fuel sample into a clean and sterilized CONTAINER 1.5 L (0.4 USGAL) MINIMUM - GRADUATED:
(a) If you do not do the analysis immediately, seal the container.

Subtask 12-32-28-750-056-A ** ON A/C NOT FOR ALL

B. Water Contamination Test
(1) Let the sample become stable.
(a) If the sample moves into two layers it contains water. Continue to drain from the water drain valve until it has no water.
(b) 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:

NOTE: Do the test only in an approved area.

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
	If the white powder changes color to purple, the sample is water. Continue to take samples and test until all the water has been removed.
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
	If the sample stays in one layer, then the sample is water. Continue to take samples until all the water has been removed.
NOTE: You can use the same procedure to do an analysis on a sample from a fuel tanker. Remove the sample from the supply connector of the fuel tanker.

5. Close-up
Subtask 12-32-28-410-056-B ** ON A/C NOT FOR ALL

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Install the applicable access panels:

For water drain valve 226QM1, install 153AZ and 197AB
For water drain valve 226QM2, install 197GB
For water drain valve 226QM4, install 134AR.

Subtask 12-32-28-410-057-A ** ON A/C NOT FOR ALL

B. Close Access (ACT1 Installed)
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Install the applicable access panels:

for the water drain valve 174QM1, install 154AZ and 198QB
for the water drain valve 175QM1, install 154BR.

Subtask 12-32-28-410-057-B ** ON A/C NOT FOR ALL

B. Close Access (ACT1 and ACT2 Installed)
(1) Make sure that the work area is clean and clear of tools and other items.
(2) If ACT1 installed, install the applicable access panels:

for the water drain valve 174QM1, install 154AZ and 198QB
for the water drain valve 175QM1, install 154BR.

(3) If ACT2 installed, install the applicable access panels:

for the water drain valve 174QM2, install 154DR
for the water drain valve 175QM2, install 153BR.

Subtask 12-32-28-942-056-A ** ON A/C NOT FOR ALL

C. 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] 2026.03.31 22:57:59 UTC