As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ETOPS SIGNIFICANT SYS - AFT CABIN TEMPERATURE GUAGE SHOWS 83 DEGREES AT 12 O'CLOCK SETTING F/A'S REPORT, CABIN AREA TOO COLD. PERFORMED BITE CHECK OF ZONE TEMP CONTROLLER NO FAULTS NOTED CLEANED AFT ZONE TEMP SENSOR AND ASSOCIATED FILTER OPS CKS NORMAL IAW AMM 21-60-00/ 501.