SDR 2008UALA02973

Service difficulty report · Line · Boeing 777222

Difficulty date: May 23, 2008
Submitted: May 27, 2008
Operation: Air carrier
Aircraft: N217UA
Make and model: Boeing 777222
Aircraft serial: 30550
Aircraft time: 31,152 hours, 4,046 cycles
Engine: Pwa PW40903
System (JASC): 2820 · Aircraft Fuel Distribution System
Part: Line
Condition: Broken
Location: Fuel System
Stage of operation: CL
How discovered: O
Nature of condition: W
Precautionary procedure: O

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

What was found

UNWANTED FUEL TRANSFER TO RIGHT MAIN JUST AFTER TAKEOFF. LINE WAS BROKEN AT RIGHT MAIN TANK SHUT OFF VALVE. REPLACED RT TANK FLOAT SHUTOFF VALVES AND MADE NEW LINE TO RT TANK OUTLET FLOAT SHUT OFF VALVE REPLACED FUEL CONTROL UNIT. OP CHKS & LEAK CHKS GOOD. FOUND RT FWD BOOST PUMP DISCHARGE CHECK VALVE LEAKING. REPLACED RT FWD BOOST PUMP DISCHARGE CHECK VALVE. REPLACED FUEL QTY PROCESSOR. OPS CHECKED GOOD.