As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIR TURNBACK, FLT NR 7304. UPON ROTATION, THE CARGO DOOR UNLOCK LIGHT ILLUMINATED. CREW ELECTED TO RETURNED. AIR CRAFT MADE A SAFE AND NORMAL LANDING. DOOR LOCK RELEASE CABLE WAS LUBRICATED AND AC RETURNED TO SERVICE. AS A PRECAUTION FWD CARGO DOOR LOCK RELEASE CABLE TO BE REPLACED AT NEXT SCHEDULED MAINTENANCE EVENT. (K)