As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT PACK LIGHT ON OVERHEAD PANEL. RECALL THEN PUSHING MST CAUTION EXTINGUISHES THE LIGHTS. ACFT GROUNDED. PERFORMED LT TEMP CONTROLLER BITE AND FOUND LT RAM AIR ACTUATOR FAULT ACTIVE. REPLACED THE LT RAM AIR ACTUATOR IAW AMM 21-51-21/401. OPS CHECKED GOOD.