Service difficulty report · Control Valve · Boeing 737890

Difficulty date
June 21, 2010
Submitted
June 23, 2010
Operation
Air carrier
Aircraft
N585AS
Make and model
Boeing 737890
Aircraft serial
35683
Aircraft time
10,579 hours, 3,212 cycles
Part
Control Valve
Part number
3989083
Part serial
11302
Condition
Stuck
Location
Ac Pack
Part time
5,179 hours, 1,664 cycles
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

LEFT PACK LT/AIRCOND LT/ MASTER CAUTION ILLUMINATED DURING RECALL ON AFTER START CHECK. FOUND ON ZONE TEMP CONT 1 TCV THIS PACK FAULT. FOUND VALVE TO BE STUCK OPEN. REPLACED LT TEMP CONTROL VALVE. TEMP CONTROL VALVE TEST OPS CHECK GOOD REF AMM 21 51 10 400 801. PACK/ZONE TEMP CONT 1 BITE PROCEDURE PERFORMED. TCV FAULT CLEARED FIM TASK 21 62 00 810 801. GROUND TESTS GOOD.