As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS NOT GROUNDED. DURING TAKEOFF THE MASTER CAUTION LIGHT ILLUMINATED. RIGHT PACK LIGHT ILLUMINATED THEN EXTINGUISHED WHEN MASTER CAUTION WAS RESET. ITEM DEFERRAL ACCOMPLISHED BY FLIGHT CREW. MAINTENANCE ACCOMPLISHED FIM 21-53-00 WITH NO FAULTS FOUND. SYSTEM CHECKS NORMAL.