What was found
APPROXIMATELY 15 MINUTES AFTER DROPPING OFF PASSENGERS, EXPERIENCED A TOTAL ENGINE SHUTDOWN. AFTER SAFELY LANDING, USED ELECTRIC FUEL PUMP TO RESTART ENGINE. WITH A SUCCESSFUL START, RESUMED TRIP. AGAIN ABOUT 15 MINUTES LATER, EXPERIANCED TOTAL ENGINE SHUTDOWN, NOTICED GAINING FUEL IN RT WING. LANDED AND CHECKED THAT BOTH FUEL CAPS WERE INSTALLED. SUCCESSFUL RESTART AND CONTINUED WITH OUT FURTHER INCIDENT.