What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
After departure the pilot noticed the fuel caps had not been secured and fuel was venting from the fuel filler ports. The pilot returned to the departure airport and upon landing failed to extend the landing gear thus landing the aircraft with the landing gear firmly in the wells. The aircraft sustained minor damage and a small fire erupted on the left wing when sparks generated due to the gear-up landing ignited fuel vented from the unsecured fuel cap.
As the FAA filed it
AFTER DEPARTURE THE PILOT NOTICED THE FUEL CAPS HAD NOT BEEN SECURED AND FUEL WAS VENTING FROM THE FUEL FILLER PORTS. THE PILOT RETURNED TO THE DEPARTURE AIRPORT AND UPON LANDING FAILED TO EXTEND THE LANDING GEAR THUS LANDING THE AIRCRAFT WITH THE LANDING GEAR FIRMLY IN THE WELLS. THE AIRCRAFT SUSTAINED MINOR DAMAGE AND A SMALL FIRE ERUPTED ON THE LEFT WING WHEN SPARKS GENERATED DUE TO THE GEAR-UP LANDING IGNITED FUEL VENTED FROM THE UNSECURED FUEL CAP.