As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RIGHT PACK LIGHT ILLUMINATED ON MASTER RECALL AT TOP OF DESCENT. RAN QRH EXTINGUISHED WITH MASTER CAUTION RESET. ACFT GROUNDED. R & R RT RAM AIR ACTUATOR DUE TO FAULT LOG ON PACK ZONE TEMP CONTROLLER, RAM AIR ACTUATOR REF AMM 21-51-21-000-801 AND AMM 21-51-21-400-801.