Service difficulty report · Control Valve · Boeing 767322

Difficulty date
January 2, 2011
Submitted
January 3, 2011
Operation
Air carrier
Aircraft
N660UA
Make and model
Boeing 767322
Aircraft serial
27115
Aircraft time
76,653 hours, 12,359 cycles
Engine
Pwa PW4060
Part
Control Valve
Part number
3987865
Part serial
87
Condition
Inoperative
Location
Rt A/C Pack
Stage of operation
NR
How discovered
9
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

RIGHT PACK WILL NOT OPERATE IN STANDBY WITH LEFT PACK ON. REPLACED RT TEMP CONTROL VALVE ALTITUDE SWITCH, CAPTS TRIM AIR VALVE, LT PACK CONTROLLER CHECKED OK ON GROUND BITE CHECK ON LT AND RT AND STANDBY CONTROLLER OK, NO FAULTS.