SDR ASAA2014012612494

Service difficulty report · Warning Message · Boeing 737890

Difficulty date: January 26, 2014
Submitted: January 28, 2014
Operation: Air carrier
Aircraft: N588AS
Make and model: Boeing 737890
Aircraft serial: 35685
Aircraft time: 23,983 hours, 7,389 cycles
System (JASC): 2160 · Cabin Temperature Control System
Part: Warning Message
Condition: False Activation
Location: Temp Controller
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 AMBER ZONE TEMP, ANNUNCIATOR ILLUMINATES WHEN MASTER CAUTION PUSHED. LIGHT RESETS WITH MASTER CAUTION RESET. ACFT GROUNDED. ACCOMPLISHED PACK/ZONE TEMPERATURE CONTROLLER BITE PROCEDURE NR 2 SHOWS FAULT FOR VALVE (V143) & NR 1 SHOWS NO FAULTS. CLEARED FAULT, RAN BITE AGAIN NOW SHOWS NO FAULTS. GROUND VERIFICATION SUCCESSFUL. ACCOMPLISHED CABIN TEMP CONTROL AND IND OPS TEST, TEST PASSED, RAN PACKS FOR 1HR, NO FAULTS NOTED. REF FIM 21-62, TASK 801 AND MM 21-61-00-700-807-002.