SDR ASAA2019030528498

Service difficulty report · Selector · Boeing 737890

Difficulty date: March 5, 2019
Submitted: March 8, 2019
Operation: Air carrier
Aircraft: N570AS
Make and model: Boeing 737890
Aircraft serial: 35185
Aircraft time: 45,725 hours, 13,585 cycles
System (JASC): 2160 · Cabin Temperature Control System
Part: Selector
Part number: 11500101
Condition: Faulted
Location: Cockpit
Stage of operation: NR
How discovered: O
Nature of condition: J
Precautionary procedure: O

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

FWD CAB ZONE TEMP LIGHT ILLUMINATED ON RECALL. THE LIGHT EXTINGUISHES WITH MASTER CAUTION RESET. GROUNDED - YES. ACCOMPLISHED PZTC BITE. NR 1 CONTROLLER SHOWED " BACKUP ZONE SELECTOR" FAULT. DUE TO HISTORY, REMOVED, REPLACED, AND TESTED FWD ZONE SELECTOR IAW MM 21-61-07-400-803-002. TEST PASSED, OK FOR SERVICE.