As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFT ZONE TEMP LIGHT ILLUMINATES ON RECALL. ACFT GROUNDED. NR 2 TEMP CONTROLLER SHOWS A "CONTROLLER STBY PACK" FAULT ON BIT, PREV FLT, & VERIFY BITE TESTS. WOULD NOT RESET. REPLACED NR 2 TEMP CONTROLLER OPS CHECK SAME GOOD. BITE TEST SAME GOOD. GROUND VERIFICATION GOOD.