As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT PACK ANNUNCIATOR LIGHT CAME ON DURING RECALL, AFTER ENGINE START THEN EXTINGUISHED WHEN MASTER CAUTION WAS PRESSED. NO OTHER LIGHT. ACFT GROUNDED. BITE CHECK OF NR 1 PACK/ZONE TEMP CONTROLLER SHOWS, THIS PACK TCV, FAULT. R & R LT TEMP CONTROL VALVE IAW AMM 21-51-10. BITE, OPS AND LEAK CHECK GOOD.