As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT DECK TEMPERATURE WENT FULL COLD ON DESCENT HAD TO PUT LT PAC IN WARM STANDBY. PERFORMED BITE TEST & FOUND ZONE SENSOR FAULT ON LT PACK & ZONE TEMPERATURE CONTROLLERS. R&R FLIGHT COMPARTMENT SENSOR PN:624018-1 IAW MM:21-61-08. RESET FAULTS, RAN PACKS & CYCLED TEMPERATURE CONTROL SEVERAL TIMES. OPERATIONS CHECKED GOOD. SN ON: 036C-8726.