(3) and the plunger assembly (1).
(2)
Install the TEST EQUIPMENT JET PUMP (98A28203000000):
(a)
Put the hexagonal end of the bush (2) into the base plate of the water drain valve.
(b)
Turn the bush (2) through 30 deg.
(c)
Turn the nut (4) until it touches and seals against the bottom skin.
(d)
Put the end of the hose into the container.
(e)
Hold the bush (2) and turn the screw (3) to the end of its travel. This causes the plunger (1) to open the drain valve and the fuel to flow.
(3)
When the fuel flow stops, hold the bush (2) and turn the screw (3) until the drain valve closes.
(4)
Remove the TEST EQUIPMENT JET PUMP:
(a)
Turn the nut (4) until it is clear of the wing surface.
(b)
Turn the bush (2) back through 30 deg. and remove the TEST EQUIPMENT JET PUMP from the applicable water drain valve.
(5)
Examine the water drain valve for leakage. Leaks are not permitted. NOTE : This step is very important because access to the center tank
____ water drain valves 94QM and 95QM is not easy.
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5. Close-up
________ Subtask 28-25-00-410-075
A. Close Access
(1)
Make sure that the work area is clean and clear of tool(s) 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 28-25-00-942-073
B. Removal of Equipment
(1)
Make sure that the work area is clean and clear of tool(s) and other items.
(2)
Remove the safety barriers.
(3)
Remove the warning notice(s).
(4)
Remove the access platform(s).
(5)
Remove the ground support and maintenance equipment, the special and standard tools and all other items.
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To Remove Collected Fuel from the Center Tank
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.
WARNING : MAKE SURE THAT THE GROUND SAFETY-LOCKS ARE IN POSITION ON THE LANDING
_______ GEAR.
WARNING : DO NOT SPILL FUEL ON THE ENGINES OR THE BRAKES. IF YOU SPILL FUEL ON
_______ ENGINES OR BRAKES THAT ARE HOT, IT CAN CAUSE FIRES.
1. Reason for the Job
__________________
To remove collected fuel from a center tank that is not in use.
2. Job Set-up Information
______________________
A. Fixtures, Tools, Test and Support Equipment
-------------------------------------------------------------------------------REFERENCE QTY DESIGNATION
-------------------------------------------------------------------------------
No specific safety barriers
No specific access platform 2.5 m (8 ft. 2 in.)
B. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
24-41-00-861-002 Energize the Aircraft Electrical Circuits from the External Power 24-41-00-862-002 De-energize the Aircraft Electrical Circuits Supplied
from the External Power 28-00-00-910-001 Fuel Safety Procedures 28-25-00-650-001 Pressure Defuel 28-25-00-869-001 Fuel Transfer
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3. Job Set-up
__________ Subtask 28-25-00-941-081
A. Safety Precautions
WARNING : OBEY THE FUEL SAFETY PROCEDURES.
_______
(1) You must obey the fuel safety procedures (Ref. TASK 28-00-00-910-001) when you do work on the fuel system.
(2) Put the safety barriers in position. Subtask 28-25-00-861-056
B. Energize the Electrical Circuits
(1) Energize the aircraft electrical network (Ref. TASK 24-41-00-861-002).
Subtask 28-25-00-010-079
C. Get Access
(1) Put the access platform below the center tank water drain valves 94QM and 95QM.
4. Procedure
_________ Subtask 28-25-00-650-068
A. Remove Collected Fuel from the Center Tank
(1)
Operate the water drain valves 94QM and 95QM to drain collected water from the center tank.
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