-
the pump symbols show green in-line.
(1)
Stop the engines (Ref. TASK 71-00-00-710-027) or (Ref. TASK 71-00-00-710-028).
(2)
De-energize the aircraft electrical circuits (Ref. TASK 24-41-00-862-002).
Subtask 28-21-00-942-074
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 ground support and maintenance equipment, the special and standard tools and all other items.
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TASK 28-21-00-790-001
Leak Test of the Main Fuel-Pump-System Pipelines
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.
1. Reason for the Job
__________________
To leak test the pipes installed or replaced in the fuel-pump system
pipelines.
2. Job Set-up Information
______________________
A. Fixtures, Tools, Test and Support Equipment
-------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific safety barriers
B. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
12-11-28-650-003 Pressure Refuel with Automatic Control 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 31-60-00-860-001 EIS Start Procedure 31-60-00-860-002 EIS Stop Procedure
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3. Job Set-up
__________ Subtask 28-21-00-941-070
A. Safety Precautions
(1) Put the safety barriers in position. Subtask 28-21-00-860-076
B. Aircraft Maintenance Configuration WARNING : MAKE SURE THAT ALL THE CIRCUITS IN MAINTENANCE ARE ISOLATED
_______ BEFORE YOU SUPPLY ELECTRICAL POWER TO THE AIRCRAFT.
WARNING : OBEY THE FUEL SAFETY PROCEDURES.
_______
(1)
Energize the aircraft electrical circuits (Ref. TASK 24-41-00-861-002).
(2)
Do the EIS start procedure (ECAM only) (Ref. TASK 31-60-00-860-001), then:
- on the ECAM control panel (CP), push (in) the FUEL push icon switch
-make sure that the FUEL page shows on the ECAM lower Display Unit (DU).
(3)
Make sure that the opposite wing tank contains sufficient fuel for the test. If necessary refuel (Ref. TASK 12-11-28-650-003).
(4)
On the panel 40VU:
-push (in) the X-FEED P/BSW.
4. Procedure
_________
NOTE : The wing-tank fuel-pump suction valves have a controlled fuel leak
____ rate when in the closed position. The fuel flow (controlled leak) is to prevent the formation of ice in the mouth of the suction valve. The fuel flow is only from the center tank to the wing tank. The maximum permitted flow is 210 kg (463 lb/Hour).
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Subtask 28-21-00-790-050
A. Leak Test of the Main Fuel-Pump-System Pipelines (Left Wing, Fuselage and Center Tank)
-------------------------------------------------------------------------------ACTION RESULT -------------------------------------------------------------------------------
1. On the panel 40VU: On the panel 40VU:
- push (in) the R TK PUMP 1 and - the R TK PUMP 1 and PUMP 2 P/BSW OFF
PUMP 2 P/BSWs. lights go off
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