SDR ASAA2022121941209

Service difficulty report · Warning Message · Boeing 737990

Difficulty date: December 19, 2022
Submitted: December 27, 2022
Operation: Air carrier
Aircraft: N423AS
Make and model: Boeing 737990
Aircraft serial: 35206
Aircraft time: 35,052 hours, 11,131 cycles
System (JASC): 2160 · Cabin Temperature Control System
Part: Warning Message
Condition: False Activation
Location: Cockpit Temp
Stage of operation: NR
How discovered: 9
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 CABIN ZONE TEMP LIGHT ILLUMINATED. GROUNDED - YES. ACCOMPLISHED B737-900 FIM 21-53 TASK 821, OPS NML. ACCOMPLISHED PACK/ZONE TEMP CONT BITE TEST, OPS NML , GREEN , REF FIM 21-62 TASK 801. GROUND VERIFICATION SUCCESSFUL. ORIG SUB DATE: 12/23/2022