As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT PACK LIGHT GOES ON WHEN RECALL IS PRESSED. THE PACK LIGHT GOES OFF WHEN MASTER CAUTION RESET IS PRESSED. ACFT GROUNDED. REPLACED LT PACK RAM AIR TEMP SENSOR. OPS CHECK NORMAL, REF AMM 21-51-50. RAN PACK FOR APPROXIMATELY 20 MINUTES. NO DEFECTS NOTED.