As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RIGHT PACK LIGHT ILLUMINATED. RESET AND LIGHT WENT OUT. ILLUMINATED AGAIN. RAM DOOR FULL OPEN LIGHT ILLUMINATED THEN EXTINGUISHED. DUCT PRESSURE NORMAL AT 40 PSI ON EACH SIDE. ACFT GROUNDED. REPLACED THE RT PACK TEMP CONTROL VALVE IAW AMM 21-51-10-400-801.