SDR 2006UALA01916

Service difficulty report · Fuel Sys · Boeing 767322

Difficulty date: October 1, 2006
Submitted: October 12, 2006
Operation: Air carrier
Aircraft: N664UA
Make and model: Boeing 767322
Aircraft serial: 29236
Aircraft time: 27,896 hours, 8,164 cycles
Engine: Pwa PW4052
System (JASC): 2824 · Fuel Transfer Valve
Part: Fuel Sys
Condition: Malfunctioned
Location: Main Tank
Stage of operation: IN
How discovered: O
Nature of condition: W
Precautionary procedure: K

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

What was found

UNWANTED FUEL TRANSFER BETWEEN MAIN FUEL TANKS. AIRPLANE SEEMS TO BE TRANSFERRING FUEL FROM R TO L MAIN TANKS: 17.0 IN LEFT; 16. ON RIGHT. TESTED PER SERVICE TIP MM2 8-11-95-0200A. CROSS FEED VALVE CHECKED GOOD NO TRANSFER NOTED. TESTED SYSTEM 03OCT2006 & FOUND UNWANTED FUEL TRANFER BETWEEN MAIN FUEL TANKS. AFTER FURTHER TROUBLE SHOOTING, REPLACED AFT ACTUATOR, MR28227. SUSPECT ACTUATOR NOT CLOSING COMPLETELY. CHECKED MOTIVE FLOW FILTERS. ALL CLEAN. AC OK FOR RETURN TO SERVICE.