Service difficulty report · Control Valve · Boeing 737890

Difficulty date
February 23, 2013
Submitted
February 26, 2013
Operation
Air carrier
Aircraft
N531AS
Make and model
Boeing 737890
Aircraft serial
35199
Aircraft time
11,038 hours, 3,406 cycles
Part
Control Valve
Condition
Malfunctioned
Location
A/C Pack
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

ON MASTER CAUTION RECALL, RT PACK LIGHT ILLUMINATES. DID THE QRH PROCEDURE - THE RT PACK LIGHT WENT OUT ON RESET. ACCOMPLISHED ZONE TEMP CONTROLLER BITE IAW FIM 21-62, TASK 801 - NR 2 CONTROLLER SHOWED FAULT THIS PACK TCV. PERFORMED T/S FOR TCV FAULT IAW FIM 21-62, TASK 831, INITIAL EVALUATION DID NOT CONFIRM FAULT AND FAULT CLEARED WITH VERIFY TEST. OPERATED RIGHT IAW MM 21-00-00-800-803, PACK OPERATED NORMALLY AND AFTERWARDS ZONE TEMP CONTROLLER BITE SHOWED NO FAULTS.