SDR ASAA2018062025138

Service difficulty report · Valve · Boeing 737890

Difficulty date: June 20, 2018
Submitted: June 21, 2018
Operation: Air carrier
Aircraft: N506AS
Make and model: Boeing 737890
Aircraft serial: 35690
Aircraft time: 38,161 hours, 11,709 cycles
System (JASC): 2160 · Cabin Temperature Control System
Part: Valve
Condition: Faulted
Location: Cockpit Temp
Stage of operation: NR
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

CONTROL CABINE ZONE TEMP LIGHT ILLUMINATED ON RECALL, CLEARS WITH MASTER CAUTION RESET. ACFT GROUNDED. ACCOMPLISHED PZTC BITE ON BOTH CONTROLLERS IAW FIM 21-62, TASK 801. ON NR 2 CONTROLLER, FOUND FLT DECK TRIM VALVE FAULT FOR PREVIOUS FLIGHT. RESET SUCCESSFUL AND VERIFY PORTION OF BITE PASSED MULTIPLE TIMES IAW FIM 21-62, TASK 801. OPS CHECKED GOOD.