SDR ASAA2018032324022

Service difficulty report · Warning Light · Boeing 737990ER

Difficulty date: March 23, 2018
Submitted: March 26, 2018
Operation: Air carrier
Aircraft: N464AS
Make and model: Boeing 737990ER
Aircraft serial: 40714
Aircraft time: 15,570 hours, 5,093 cycles
System (JASC): 2160 · Cabin Temperature Control System
Part: Warning Light
Condition: False Activation
Location: Cockpit Temp
Stage of operation: NR
How discovered: O
Nature of condition: N
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 LIGHT ON DURING RECALL, LIGHT OUT AFTER RESET. ACFT GROUNDED. PERFORMED BITE TEST OF ZONE TEMP CONTROLLER IAW AMM 21-60-00, FLT DECK TRIM VALVE SOFT FAULT, RESET THE NR 2 PACK ZONE TEMP CONTROLLER, NO FAULTS NOTED. NO HISTORY LAST 60 DAYS.