As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKE OFF. LEFT PACK LIGHT ILLUMINATED. ACCOMPLISHED QRH. PACK LIGHT DID NOT RESET. TURNED OFF THE LEFT PACK AND CLOSED ISOLATION VALVE. LEVELED OFF AT FL 250. ACFT PRESSURIZED NORMALLY. ACFT GROUNDED. PACK ZONE TEMP CONTROLLER 1 SHOWS TCV FAULT LAST AND PREVIOUS FLTS. REMOVED AND REPLACED TEMPERATURE CONTROL VALVE ON THE NR 1 PACK IAW AMM 21-51-10-000-801. LEAK CHECKED GOOD, GROUND VERIFICATION GOOD. ACCOMPLISHED ENGINE RUN.