Service difficulty report · Control Valve · Boeing 737890

Difficulty date
February 21, 2012
Submitted
February 24, 2012
Operation
Air carrier
Aircraft
N565AS
Make and model
Boeing 737890
Aircraft serial
35181
Aircraft time
20,058 hours, 6,228 cycles
Part
Control Valve
Part number
3989083
Part serial
9102
Condition
Malfunctioned
Location
Ac Bay
Part time
20,076 hours, 6,237 cycles
Stage of operation
TX
How discovered
O
Nature of condition
J
Precautionary procedure
D

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

What was found

LT PACK LIGHT ILLUMINATED ON RECALL AND WOULD NOT RESET. ACCOMPLISHED FIM TASK 21 62 00 810 801 ZONE TEMP CONTROLLER BITE TEST. FOUND TCV FAULT ON NR 1 TEMP CONTROLLER. INTERMITTENT FAULT RESET. PACK OPS NORMAL. GROUND TEST VERIFIED INTERMITTENT FAULT. DUE TO HISTORY T/S REQUESTS REPLACE L TCV. REPLACED LEFT TCV IAW AMM 21 51 10 400 801 OPS CK NORMAL