SDR ASAA2019103031211

Service difficulty report · Warning System · Boeing 737890

Difficulty date: October 30, 2019
Submitted: November 5, 2019
Operation: Air carrier
Aircraft: N592AS
Make and model: Boeing 737890
Aircraft serial: 35190
Aircraft time: 44,950 hours, 13,525 cycles
System (JASC): 2160 · Cabin Temperature Control System
Part: Warning System
Condition: False Activation
Location: Cockpit
Stage of operation: CL
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

JUST AFTER TAKEOFF OAK, THE "CONTROL CABIN ZONE TEMP" LIGHT ILLUMINATED, QRH FOLLOWED, LIGHT EXTINGUISHED AFTER MASTER CAUTION RESET. GROUNDED - YES. ACCOMPLISHED BITE TEST REF B737-800 FIM 21-62 TASK 801. FOUND TRIM VALVE FLT DECK FAULT LIGHT ON. IN HISTORY. CLEARS AFTER RESET, NO FURTHER DEFECT NOTED OK FOR SERVICE. THIS CLEARS MEL 21-21G.