Service difficulty report · Modulating Valve · Boeing 737890

Difficulty date
December 4, 2007
Submitted
December 10, 2007
Operation
Air carrier
Aircraft
N587AS
Make and model
Boeing 737890
Aircraft serial
35684
Aircraft time
352 hours, 121 cycles
Part
Modulating Valve
Part number
3983083
Condition
Malfunctioned
Location
Cabin Temp
Stage of operation
TX
How discovered
O
Nature of condition
J
Precautionary procedure
K

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

What was found

CONTROL CABIN `ZONE TEMP` LIGHT CAME ON DURING RECALL. GOES OUT ON RESET. REPLACED CONTROL CABIN TRIM AIR MODULATION VALVE. OP AND BITE CHECKS OK.