SDR UALA2011033001518

Service difficulty report · Pressure Switch · Boeing 767322

Difficulty date: March 28, 2011
Submitted: April 6, 2011
Operation: Air carrier
Aircraft: N665UA
Make and model: Boeing 767322
Aircraft serial: 29237
Aircraft time: 45,543 hours, 12,455 cycles
Engine: Pwa PW4056
System (JASC): 2820 · Aircraft Fuel Distribution System
Part: Pressure Switch
Condition: Faulty
Location: Fuel System
Stage of operation: NR
How discovered: O
Nature of condition: J
Precautionary procedure: D

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

What was found

CTR AUX OVRD PUMP LOW PRESS LIGHT ON, SW ON, EICAS MSG CTR L-R FUEL PUMP. POSITION 7 (7=L CTR,11=R CTR). VERIFIED RIGHT PUMP LO PRESSURE LIGHT NORMAL OPS PER MEL. LEFT CTR PMP INOPED. NEED TO TROUBLESHOOT, LEFT PUMP APPEARS TO BE WORKING, ON RETURN TO BLOCKS. FOUND LEFT FUEL OVRD PRESS SW S423 BAD. REPLACED SW SYSTEM, CHECKED GOOD.