Service difficulty report · Control Valve · Boeing 757222

Difficulty date
March 12, 2012
Submitted
April 13, 2012
Operation
Air carrier
Aircraft
N519UA
Make and model
Boeing 757222
Aircraft serial
24872
Aircraft time
70,693 hours, 26,496 cycles
Engine
Pwa PW2037
Part
Control Valve
Part number
3987505
Part serial
139
Condition
Faulty
Location
Ac Bay
Stage of operation
IN
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

COCKPIT TEMP WILL NOT COOL ON GROUND IN AUTO OR STBY HAS HISTORY NO TIME TO T-S. UNABLE TO MAINTAIN CONSISTENT CABIN TEMP IN ANY AVAILABLE MODE. TEMP CONSTANTLY FLUCTUATES. HAS HISTORY NO TIME TO T-S. COMPLIED WITH MEL CARD. RPL'D ZONE TEMP CONTROLLER. REPLACED LEFT PACK TEMP CONTROL VALVE, OPS CHECK OKAY.