Service difficulty report · Shutoff Valve · Boeing 777222

Difficulty date
January 7, 2010
Submitted
February 4, 2010
Operation
Air carrier
Aircraft
N777UA
Make and model
Boeing 777222
Aircraft serial
26916
Aircraft time
59,186 hours, 11,067 cycles
Engine
Pwa PW4077
Part
Shutoff Valve
Part number
S343T00343
Part serial
P48559
Condition
Leaking
Location
Apu Fuel
Stage of operation
IN
How discovered
V
Nature of condition
K
Precautionary procedure
K

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

What was found

FUEL DRIPPING FROM UNDERSIDE OF LT WING ROOT. APU SHUT OFF VALVE (LOCATED LT WING ROOT AFT SPAR) HAS A SEVERE FUEL LEAK WHEN VALVE IS OPEN AND DC FUEL PUMP IS ENERGIZED. REPLACED APU FUEL VALVE AND SEALS. INSTALLED ACTUATOR AND SAFETIED.