SDR UALA2011030801142

Service difficulty report · Check Valve · Boeing 757222

Difficulty date: March 8, 2011
Submitted: March 31, 2011
Operation: Air carrier
Aircraft: N542UA
Make and model: Boeing 757222
Aircraft serial: 25276
Aircraft time: 64,570 hours, 23,778 cycles
Engine: Pwa PW2037
System (JASC): 2824 · Fuel Transfer Valve
Part: Check Valve
Condition: Malfunctioned
Location: Fuel System
Stage of operation: NR
How discovered: O
Nature of condition: O
Precautionary procedure: O

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

What was found

FUEL TRANSFER PROBLEM. WITH RT TANK FULL AND RT PUMPS ON, MONITORED FUEL QUANTITIES FOR 2 HOURS. NO TRANSFER NOTED, ALL QTYS REMAINED CONSTANT. ACCOMPLISHED BIT CHECK TO FUEL QTY SYSTEM, SYSTEM OK. TRANSFERRED IN AND OUT OF CENTER TANK AND VERIFIED NO UNWANTED TRANSFER BACK INTO CENTER TANK. REPLACED RT CTR TANK DISCHARGE CHECK VALVE. OPERATES NORMAL. TESTED AND FOUND NO FUEL GOING TO CENTER TANK FROM RT WING.