As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT RAM DOOR FULL OPEN LIGHT ILLUMINATED AT CRUISE ALTITUDE, FL 360. ACFT GROUNDED. ALL CIRCUIT BREAKERS ARE IN, NO FAULTS ON EITHER PACK ZONE TEMP CONTROL SYSTEM. RAN VERIFICATION ON BOTH PACK ZONE TEMP CONTROL SYSTEMS, RAN BITE ON NR 1 PACK ZONE TEMP CONTROL SYSTEM FOUR TIMES WHILE MONITERING LT RAM AIR DOOR. SMOOTH & QUICK OPERATION OF ACTUATOR. REF MM 21-61-00, NO DEFECTS NOTED.