As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER ENGINE START, THE RT PACK LIGHT ILLUMINATED ON MASTER CAUTION RECALL. ACCOMPLISHED QRH PROCEDURES AND LIGHT EXTINGUISHED WITH MASTER CAUTION RESET. ACFT GROUNDED. ACCOMPLISHED FIM 21-62 TASK 801. RAN PACK/ZONE TEMP CONTROLLER BITE CHECK, NO FAULTS FOUND. COMPLETED FIM 21-62 TASK 848, NO PACK LIGHT ON RECALL. OK FOR SERVICE.