Service difficulty report · Control Valve · Boeing 737890

Difficulty date
October 26, 2012
Submitted
October 29, 2012
Operation
Air carrier
Aircraft
N596AS
Make and model
Boeing 737890
Aircraft serial
35688
Aircraft time
17,113 hours, 5,442 cycles
Part
Control Valve
Part number
3989083
Part serial
11808
Condition
Malfunctioned
Location
A/C Bay
Part time
13,204 hours, 4,134 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

AFTER ENGINE START, ACCOMPLISHED THE AFTER START CHECKLIST, RECEIVED AN AIR CONDITIONING ON RECALL TEST. OBSERVED PACK LIGHT ON RT ENG. ACCOMPLISHED QRH 2.7. LTS WENT OUT WHEN MASTER CAUTION RESET. ON SUBSEQUENT FLIGHT, RIGHT PACK LIGHT ILLUMINATED AND WOULD NOT RESET. ON BITE TEST, TCV LOGGED AS FAULTY. R & R THE RIGHT TEMP CONT VALVE, OPS NORMAL REF MM 21-51-10-400-801. NO LEAKS DURING LEAK TEST.