As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ZONE TEMP LIGHT ILLUMINATED JUST AFTER LEVEL OFF AT FL350. LIGHT EXTINGUISHED WHEN MASTER CAUTION BUTTON PUSHED. ACCOMPLISHED QRH PROCEDURES. (CONT CAB ZONE LIGHT). ACFT GROUNDED. PERFORMED FIM 21-62 ,TASK 848, REMOVED AND REPLACED CONTROL CABIN TRIM VALVE IAW AMM 21-61-21/401. NR 1 & 2 PZTC BITE TESTED NORMAL, BOTH PACK OPS CHECKED NORMAL ON GROUND. VALVE LEAK CHECKED GOOD.