Service difficulty report · Switch · Boeing 777222

Difficulty date
July 13, 2009
Submitted
July 16, 2009
Operation
Air carrier
Aircraft
N777UA
Make and model
Boeing 777222
Aircraft serial
26916
Aircraft time
57,189 hours, 10,747 cycles
Engine
Pwa PW4077
Part
Switch
Part number
0335KPU01
Condition
Faulty
Location
Fuel System
Stage of operation
NR
How discovered
O
Nature of condition
O
Precautionary procedure
K

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

What was found

EXPANDED FUEL QTY DISPLAY WON'T GO AWAY WITH NORMAL CONFIG. AHM REPORTING 'CENTER R FUEL PUMPS SWITCH IS FAILED'. EXPANDED FUEL INDICATION WILL APPEAR IF FUEL IS IN CENTER TANK & CENTER TANK PUMPS ARE 'OFF' (OR ERRONEOUS INDICATION THAT PUMPS ARE 'OFF'). REPLACED RIGHT CENTER PUMP SWITCH. TRANSFER FUEL IN AND OUT OF CENTER TANK. OPS AND INDICATION NORMAL.