TASK 28-22-04-404-066
3. Install the Bypass Valve of the Fuel Boost Pump (Fig. 401)
_______________________________________________
A. References
(1)
AMM 28-11-00/201, Fuel Tanks
(2)
AMM 28-11-01/401, Main Tank Access Door
(3)
AMM 28-22-07/401, Fuel Line and Fittings
B.
Access
(1)
Location Zones 541 Main Tank - Rib No. 5 to No. 17 (Left) 641 Main Tank - Rib No. 5 to No. 17 (Right)
(2)
Access Panels 541AB Main Tank Access Door (Left) 641AB Main Tank Access Door (Right)
C.
Procedure
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28-22-04
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A
757
MAINTENANCE MANUAL
S 944-067
WARNING: OBEY THE FUEL TANK ENTRY PRECAUTIONS (AMM 28-11-00/201).
_______ FAILURE TO OBEY THE FUEL TANK ENTRY PRECAUTIONS COULD CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
(1)
Obey the fuel tank entry precautions (AMM 28-11-00/201).
S 014-094
(2)
Go into the fuel tank.
S 424-068
(3)
To install the bypass valve, do the steps that follow:
(a)
Remove the covers from the open ends of the suction feed line.
(b)
Align the bypass valve with the suction feed line.
(c)
Put a new O-ring between the flange on the suction feed line and the flange of the bypass valve.
(d)
Install the screws, washers and nuts on the flanges to attach the bypass valve to the suction feed line.
(e)
Install the coupling between the bypass valve and the suction feed line (AMM 28-22-07/401).
(f)
Install the fasteners to attach the mounting brackets to the end rib of the fuel tank.
S 414-035
(4) Install the applicable left or right main tank access door, 541AB or 641AB (AMM 28-11-01/401).
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