As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MIA - FLT 2240 - AFT CARGO DOOR LIGHT ILLUMINATED ON TAKEOFF. FLIGHT RETURNED TO MIA WHERE LANDING WAS WITHOUT FURTHER INCIDENT. MAINTENANCE FOUND CARGO STRAP WEDGED BETWEEN ROLLER AND CAM. REMOVED STRAP AND CHECKED OPERATION OF DOOR WARNING SYSTEM. OPS CHECK NORMAL (Z)