SDR ASAA2018010323074

Service difficulty report · Controller · Boeing 737990ER

Difficulty date: January 3, 2018
Submitted: January 4, 2018
Operation: Air carrier
Aircraft: N423AS
Make and model: Boeing 737990ER
Aircraft serial: 35206
Aircraft time: 18,706 hours, 6,156 cycles
System (JASC): 2160 · Cabin Temperature Control System
Part: Controller
Condition: Faulted
Location: Nr 2
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 CABIN ZONE TEMP ILLUMINATED, RAN QRH. THE LIGHT EXTINGUISHED BUT ILLUMINATED ON RECALL. TEMP NORMAL. ACFT GROUNDED. ACCOMPLISHED A BITE CHECK ON THE NR 1 & 2 CONTROLLERS, NR 1 GOOD, NR 2 FAULTED FOR FLT DECK TRIM VALVE. RESET THE NR 2 CONTROLLER, TESTED OK IAW FIM 21-61 TASK 801.