SDR ASAA2013120796659

Service difficulty report · Control Valve · Boeing 737890

Difficulty date: December 7, 2013
Submitted: December 9, 2013
Operation: Air carrier
Aircraft: N597AS
Make and model: Boeing 737890
Aircraft serial: 35689
Aircraft time: 21,684 hours, 6,805 cycles
System (JASC): 2150 · Cabin Cooling System
Part: Control Valve
Part number: 3989083
Part serial: 11542
Condition: Faulted
Location: A/C Bay
Part time: 17,535 hours, 5,562 cycles
Stage of operation: CL
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 CLIMBOUT RT PACK LIGHT ILLUMINATED, RESET MASTER CAUTION PACK LIGHT WENT OUT. ACFT GROUNDED. PERFORMED BITE TEST OF PACK/ZONE TEMP CONTROLLERS RT PACK SHOWS FAULT OF TCV. R & R TCV, PERFORMED BITE TEST OF PACK/ZONE TEMP CONTROLLERS, NO FAULTS FOUND, LEAK CHECKED VALVE, NO LEAKS NOTED.