Service difficulty report · Valve · Boeing 747422

Difficulty date
October 3, 2013
Submitted
October 4, 2013
Operation
Air carrier
Aircraft
N128UA
Make and model
Boeing 747422
Aircraft serial
30023
Aircraft time
54,833 hours, 6,358 cycles
Engine
Pwa PW4056
Part
Valve
Condition
Malfunctioned
Location
Fuel System
Stage of operation
IN
How discovered
O
Nature of condition
K
Precautionary procedure
O

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

PRE-FLIGHT FUELING NR 3 TANK REFUEL VALVE FIRST CANNOT BE CLOSED CAUSED OVERFLOW FROM VENT PORT. FUEL DRAINING OUT RT VENT SCOOP FOLLOWING FUELING. PROBABLY AT SEVERAL GALLONS PER MIN. DRAIN OUT ALL RESIDUAL FUEL FROM RT SURGE TANK. ACCOMPLISHED RESET FUELING PANEL & RESET REFUEL SWITCH, VALVE CLOSED & DRAIN ALL RESIDUAL FUEL FROM VENT SURGE TANK & CHECKED NO DRIP FROM VENT PORT, CHECKED WW PORT FINE.