Service difficulty report · Control Valve · Boeing 737890

Difficulty date
February 24, 2013
Submitted
February 26, 2013
Operation
Air carrier
Aircraft
N579AS
Make and model
Boeing 737890
Aircraft serial
35187
Aircraft time
23,098 hours, 6,891 cycles
Part
Control Valve
Part number
3989083
Part serial
9924
Condition
Malfunctioned
Location
A/C Pack
Part time
20,272 hours, 6,207 cycles
Stage of operation
TX
How discovered
O
Nature of condition
J
Precautionary procedure
O

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

What was found

DURING RECALL ON LANDING CHECKLIST RT PACK LIGHT CAME ON. ACCOMPLISHED FIM 21-62 TASK 801 PACK/ZONE TEMP CONTROLLER BITE PROCEDURE ON NR 1 AND NR 2 TEMP CONTROLLER. NR 2 TEMP CONTROLLER LOGGED THIS PACK-TCV. ACCOMPLISHED FIM 21-62, TASK 831 STEPS A THROUGH F AND R & R RT PACK TEMP CONTROL VALVE REF MM 21-51-10. TCV LEAK CKS GOOD, PACK/ZONE TEMP CONTROLLER BITE CKS GOOD. PACK LIGHT NO LONGER ILLUMINATES ON RECALL.