Service difficulty report · Valve · Boeing 777222

Difficulty date
March 23, 2010
Submitted
April 1, 2010
Operation
Air carrier
Aircraft
N222UA
Make and model
Boeing 777222
Aircraft serial
30553
Aircraft time
36,287 hours, 4,447 cycles
Engine
Pwa PW40903
Part
Valve
Part number
32908144
Condition
Leaking
Location
Apu Fuel
Stage of operation
IN
How discovered
9
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 APU FUEL VENT. FUEL LEAKING FROM FWD DRAIN LINE 50-60 DROPS PER MIN. NO LEAK WITH APU OFF. SUSPECT SURGE CONTROL VALVE ACTUATOR. THE FUEL PUMP SHAFT SEAL, IGV ACTR & SCV HAVE TELL TALE WITNESS DRAINS TO EASILY IDENTIFY A FAULTY UNIT. EACH HAS AN ALLOWABLE 1CC IAW MIN RATE. RPR OR RPL AS NEEDED. VERIFIED SURGE VALVE WAS SOURCE OF FUEL. REPLACED SURGE VALVE.