As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RT UPPER WING SURFACE FUEL CAP CAME OFF INFLIGHT, A/C DIVERTED TO RST AND LANDED WITHOUT INCIDENT. MX FOUND CAP IN AN UNLOCKED POSITION, TAB WAS UP AND ROTATED COUNTER CLOCKWISE IN THE OPEN POSITION. MX INSPECTED FUEL CAP, WING SURFACE. NO DEFECTS NOTED. RESECURED FUEL CAP.