As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER ENG START WITH MASTER RECALL, ZONE TEMP CAUTION LIGHT ILLUMINATED AND EXTINGUISHED WITH MASTER CAUTION RESET. GROUNDED - YES. CONFIRMED FAULT, PERFORMED BITE EST PER B737-900 FIM 21-62 TASK 801. FOUND HISTORY OF TCV FAULT. REMOVED & REPLACED TRIM AIR VALVE PER B737-900 AMM 21-61-21-400-801.