As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING A MASTER CAUTION RECALL ON DESCENT CHECK, RIGHT PACK LIGHT ILLUMINATED. QRH COMPLIED WITH. LIGHT EXTINGUISHED DURING MASTER CAUTION RESET. ACFT GROUNDED. PERFORMED INITIAL EVALUATION AND FAULT ISOLATION PROCEDURES IAW FIM 21-53, TASK 808. RIGHT PACK SYSTEM OPERATES NORMAL. COULD NOT DUPLICATE.