As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT PACK ON DURING RECALL, RESETS WITH MASTER CAUTION RESET. ACFT GROUNDED. PERFORMED INITIAL EVALUATION AND FAULT ISOLATION OF THE LT PACK IAW FIM 21-62 TASK 848, AND 21-62 TASK 801. NO FAULTS FOUND. OPERATED APU AND RAN BOTH PACKS, NO PACK LIGHT SHOWN OR ON RECALL. COULD NOT DUPLICATE.