What was found
AFTER APPLYING TAKEOFF POWER, THE AFT CARGO DOOR WARNING LIGHT ILLUMINATED. ABORTED TAKEOFF. FOUND THE DOOR LOCKED AND SECURE, DOOR OPERATION CHECKED OK.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
AFTER APPLYING TAKEOFF POWER, THE AFT CARGO DOOR WARNING LIGHT ILLUMINATED. ABORTED TAKEOFF. FOUND THE DOOR LOCKED AND SECURE, DOOR OPERATION CHECKED OK.