SDR ASAA2019051529345

Service difficulty report · Warning System · Boeing 737890

Difficulty date: May 15, 2019
Submitted: May 16, 2019
Operation: Air carrier
Aircraft: N568AS
Make and model: Boeing 737890
Aircraft serial: 35183
Aircraft time: 46,883 hours, 14,150 cycles
System (JASC): 2160 · Cabin Temperature Control System
Part: Warning System
Condition: False Activation
Location: Cockpit
Stage of operation: TX
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

CONT CAB ZONE TEMP LITE ILLUMINATED AFTER START ON RECALL, EXTINGUISHES ON MASTER CAUTION RESET. GROUNDED - YES. RELEASED PER MEL 21-21G, PRIMARY FLT DECK TEMP CONTROL - INOP. PERFORMED BITE ON NR 1 & 2 ZONE TEMP CONTROLLERS PER FIM 21-62 TASK 801, OPS CHECK GOOD, NO DEFECTS NOTED, CONT CAB LIGHT EXTINGUISHED AND REMAINED OFF. AIRCRAFT RELEASED FROM MEL 21-21G.