As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED THAT THE RIGHT FUEL CAP CAME OFF DURING FLIGHT. THE AIRCRAFT RETURNED TO FIELD AND LANDED WITHOUT INCIDENT. MAINTENANCE RE-SECURED THE RIGHT OVERWING FUEL CAP AS REQUIRED. OPERATIONAL CHECKS WERE GOOD WITH NO FURTHER DEFECTS NOTED.