As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT PACK LIGHT ILLUMINATES ON RECALL, MASTER CAUTION RESET. ACFT GROUNDED. PERFORM BITE TEST ON PACK/ZONE TEMP CONTROLLER 1 FOUND TEMP CONTROL VALVE ON PACK INOPERATIVE REF MM 21-61-00. R & R TCV ON LT PACK. NO LEAKS NOTED REF MM 21-51-10. OPS CHECKED GOOD. PERFORM BITE TEST ON CONTROLLER 1. NO FAULTS NOTED.