Service difficulty report · Control Valve · Boeing 777222

Difficulty date
December 18, 2010
Submitted
December 23, 2010
Operation
Air carrier
Aircraft
N784UA
Make and model
Boeing 777222
Aircraft serial
26951
Aircraft time
60,902 hours, 8,784 cycles
Engine
Pwa PW4090
Part
Control Valve
Part number
8102044
Part serial
256
Condition
Malfunctioned
Location
Lt A/C Pack
Stage of operation
CL
How discovered
V
Nature of condition
B, J
Precautionary procedure
A

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

What was found

LIGHT HAZE IN COCKPIT, RTFL. LEFT PACK FLOW CONTROL VALVE'S INOP PER CMC DOWNLOADED FAULTS. PER FIM MANUAL REPLACED LEFT PACK ASCPC COMPRESSOR DISCHARGE SENSOR AND PACK TESTS OK. NO LONGER HAZE OR NEW ODORS.