Installation of the Water Drain Valve

TASK 28-11-41-400-006-A
Installation of the Water Drain Valve

WARNING: MAKE SURE THAT THE FLIGHT CONTROL SAFETY-LOCKS AND THE WARNING NOTICES ARE IN POSITION.

WARNING: MAKE SURE THAT THE GROUND SAFETY-LOCKS ARE IN POSITION ON THE LANDING GEAR. THIS WILL PREVENT UNWANTED MOVEMENT OF THE LANDING GEAR, AND THUS POSSIBLE INJURY TO PERSONS AND DAMAGE TO THE AIRCRAFT AND/OR EQUIPMENT.

WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.

FIN: 94QM
FIN: 95QM

1. Reason for the Job
Self Explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE
No specific	AR	SAFETY BARRIER(S)
No specific	AR	WARNING NOTICE(S)

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.01ABA1)	Turbine Fuel-- Kerosene -
(Material No.03FAB1)	Mineral Oil base Grease-- Vaseline or Petrolatum -
(Material No.06HAA1)	Coating Sealant-Fuel Tank Brushable -
(Material No.08BAA9)	Non Aqueous Cleaner-General - -
(Material No.14SBA1)	Textile-Lint free Cotton -

C. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
8	O-RING	AIPC 28-11-05-01-030
6	O-RING	AIPC 28-11-05-01-040
8	O-RING	AIPC 28-11-85-01-030
6	O-RING	AIPC 28-11-85-01-040

D. Referenced Information

REFERENCE	DESIGNATION
TASK 12-11-28-650-003-A	Pressure Refuel with Automatic Control
TASK 28-10-00-910-001-A	Safety Procedures When You Do Work in a Fuel Tank
TASK 28-10-00-910-002-A	Access to the Fuel Tanks and the Work Areas
TASK 28-25-00-650-001-A	Pressure Defuel
TASK 28-25-00-869-001-A	Fuel Transfer
TASK 32-12-00-010-001-A	Open the Main Gear Doors for Access
TASK 32-12-00-410-001-A	Close the Main Gear Doors after Access
TASK 57-17-11-000-001-A	Removal of Access Cover 147AZ(148AZ)
TASK 57-17-11-000-001-B	Removal of Access Cover 148AZ or/and the ACT-Equipment Support Door
TASK 57-17-11-400-001-A	Installation of Access Cover 147AZ(148AZ)
TASK 57-17-11-400-001-B	Installation of Access Cover 148AZ or/and the ACT-Equipment Support-Door
Water Drain Valve - Center Tank

3. Job Set-up
Subtask 28-11-41-941-076-A

A. Safety Precautions

WARNING: BEFORE YOU DO WORK IN OR NEAR A FUEL TANK, MAKE SURE THAT YOU OBEY ALL THE SAFETY PROCEDURES. THIS WILL PREVENT INJURY TO PERSONS AND/OR DAMAGE TO THE AIRCRAFT.

(1) You must obey the safety procedures when you do work in a fuel tank (Ref. AMM TASK 28-10-00-910-001).
(2) Make sure that the SAFETY BARRIER(S) are in position.
(3) Make sure that the WARNING NOTICE(S) is in position to tell persons not to operate the main gear doors.

Subtask 28-11-41-860-061-A ** ON A/C NOT FOR ALL

B. Aircraft Maintenance Configuration
(1) Make sure that the center tank is defueled (Ref. AMM TASK 28-25-00-650-001).
(2) Make sure that the applicable main gear doors are open (Ref. AMM TASK 32-12-00-010-001).
(3) Make sure that the 460005835 SLEEVE - GROUND LOCK is on the applicable main gear door actuator.
(4) Make sure that the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE is below the applicable access panel 147AZ(148AZ).
(5) Make sure that the applicable access panel 147AZ(148AZ) is removed (Ref. AMM TASK 57-17-11-000-001) and (Ref. AMM TASK 28-10-00-910-002).
(6) Make sure that the applicable quick release access panel 195BB(196BB) is open.

Subtask 28-11-41-860-061-C ** ON A/C NOT FOR ALL

4. Procedure
Subtask 28-11-41-420-062-A

A. Preparation for Installation
(1) Clean the component interface and/or the adjacent area with a Textile-Lint free Cotton - (Material No.14SBA1) made moist with Non Aqueous Cleaner-General - - (Material No.08BAA9) .
(2) Make sure that the parts retained from the removed component are clean and in the correct condition.
(3) Do an inspection of the component interfaces and the adjacent area.
(4) Make sure that the parts retained from the removed component are clean and in the correct condition.
(5) Apply Turbine Fuel-- Kerosene - (Material No.01ABA1) or Mineral Oil base Grease-- Vaseline or Petrolatum - (Material No.03FAB1) to the new AIPC 28-11-05-01-040 O-RING (6) or AIPC 28-11-85-01-040 O-RING (6) and AIPC 28-11-05-01-030 O-RING (8) or AIPC 28-11-85-01-030 O-RING (8).

Subtask 28-11-41-420-056-A

B. Installation of the Water Drain Valve
(1) Install the O-ring (6) on the water drain valve (5).
(2) Put the bolts (9) in position then install one O-ring (8) on each bolt (9).
(3) Install the water drain valve (5).
(4) Install and tighten the nuts (7).
(5) Apply Coating Sealant-Fuel Tank Brushable - (Material No.06HAA1) on and around the head of the bolts (9).

Subtask 28-11-41-410-054-A ** ON A/C NOT FOR ALL

C. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Install the access panel 147AZ(148AZ) (Ref. AMM TASK 57-17-11-400-001).

Subtask 28-11-41-410-054-C ** ON A/C NOT FOR ALL

C. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Install the access panel 148AZ (Ref. AMM TASK 57-17-11-400-001).

Subtask 28-11-41-650-060-A

D. Fuel Configuration
(1) Refuel the center tank to 750 kg (1650 lb) (Ref. AMM TASK 12-11-28-650-003).

Subtask 28-11-41-790-055-A

E. Leak Test
(1) Examine the water drain valve (5) and the bottom skin joint for leaks.

5. Close-up
Subtask 28-11-41-410-059-A

A. Close Access
(1) Close the quick release access panel 195BB(196BB).
(2) Remove the access platform.
(3) Close the main gear doors (Ref. AMM TASK 32-12-00-410-001).

Subtask 28-11-41-650-061-A

B. Fuel Configuration
(1) Refuel, defuel or transfer fuel as necessary (Ref. AMM TASK 12-11-28-650-003), (Ref. AMM TASK 28-25-00-650-001) or (Ref. AMM TASK 28-25-00-869-001).

Subtask 28-11-41-942-057-A

C. 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 06:17:05 UTC