SDR UALA2011102705812

Service difficulty report · Fmu · Boeing 747422

Difficulty date: October 26, 2011
Submitted: November 11, 2011
Operation: Air carrier
Aircraft: N197UA
Make and model: Boeing 747422
Aircraft serial: 26901
Aircraft time: 57,984 hours, 6,904 cycles
Engine: Pwa PW4056
System (JASC): 7321 · Fuel Control/Turbine Engines
Part: Fmu
Part number: 8010002
Part serial: 326
Condition: Failed
Location: Nr 3 Engine
Stage of operation: IN
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

NR 3 ENGINE FUEL VALVE EICAS MESSAGE WHEN FUEL CONTROL SWITCH PUT TO RUN (2X). CREW CYCLED CIRCUIT BREAKER L12 (ENG3 FUEL CONT VALVE) NO HELP. REPLACED FMU PER MM, LEAK CHECKED OK, RAN ENGINE AT IDLE PER JRH, NR 3 ENG FUEL CONTROL VALVE CIRCUIT BREAKER STAYED IN, FUEL FLOW NORMAL, ENGINE CONDITION NORMAL.