As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PRIOR TO TOP OF DESCENT, WHEN RECALL WAS CHECKED, THE RIGHT PACK LIGHT ILLUMINATED. THE LIGHT EXTINGHISHED WHEN THE MASTER CAUTION SYSTEM ANNUNCIATOR WAS RESET. GROUNDED-YES. ACCOMPLISHED BITE CHECK OF THE NR 2 PACK TEMP CONTROLLER FOUND ACTUATOR FAULT. FAULT RESET UPON COMPLETION OF BITE CHECK OF CONTROLLER AND DID NOT RETURN. RAN PACK SYSTEMS FOR MULTIPLE MINUTES. OPERATIONS CHECK GOOD, REF B737-800 FIM 21-62 TASK 801.