As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT PACK LIGHT ILLUMINATED ON MASTER CAUTION RECALL. LIGHT EXTINGUISHED WHEN MASTER CAUTION WAS RESET. FOLLOWED QRH. ACFT GROUNDED. PERFORMED A BITE CHECK OF PZT CONTROLLERS, NO FAULTS NOTED IAW AMM 21-61-00-700-806-002. DUE TO REPEATED WRITE-UP, REMOVED AND REPLACED THE LT RAM AIR INLET ACTUATOR AS PRECAUTION, OPS CHECKED GOOD IAW AMM 21-51-21. LT PACK OP CHECKED NORMAL IAW AMM 21-00-00-800-803.