Service difficulty report · Control Valve · Boeing 737890

Difficulty date
November 16, 2011
Submitted
November 18, 2011
Operation
Air carrier
Aircraft
N517AS
Make and model
Boeing 737890
Aircraft serial
35197
Aircraft time
10,933 hours, 3,389 cycles
Part
Control Valve
Part number
3989083
Part serial
7020
Condition
Faulty
Location
Ac Bay
Part time
27,085 hours, 12,209 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

LT PACK LGHT ON RECALL. PERF'D PACK/ZONE TEMP CONT BITE PROC 21 62 TASK 801 FOUND "THIS PACK TCV" FAULT ON NR 1 ON BITE AND PREV LEG. REF FIM TASK 21 62 00 810 830 REQ'S TEMP CNTL VLV REPLACEMENT. REPLACED TEMP CONTROL VLV REF MM 21 51 10 W. TCV TESTS GOOD REF MM 21 51 00. ALSO FOUND CONTROL CABIN AND CABIN TEMP SENSOR FILTERS VERY DIRTY. REPLACED FILTERS PER MM 21 61 06 100 801. PACK/ZONE TEMP CONT BITE SHOWS NO FAULTS.