Service difficulty report · Pressure Switch · Boeing 777222

Difficulty date
November 29, 2010
Submitted
December 17, 2010
Operation
Air carrier
Aircraft
N778UA
Make and model
Boeing 777222
Aircraft serial
26940
Aircraft time
58,871 hours, 10,626 cycles
Engine
Pwa PW4077
Part
Pressure Switch
Part number
21C1627
Condition
Malfunctioned
Location
Fuel Cell
Stage of operation
IN
How discovered
9
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

CHRONIC LT CTR TANK FUEL PUMP FAULT RELATED TO MESSAGE. REPLACED CONNECTOR D2189P, WIRE W8189-2001R-20, WIRE W8189-2001B-20, AND CONNECTOR DS28110. INSTALLED NEW PRESSURE SWITCH INW IPC 28-42-01-002 ITEM 22 ACP TEST OF LT CTR FUEL PUMP PRESSURE SWITCH S28110 PER MM.