What was found
A 'WIGGINS' CONNECTOR IN THE RIGHT ENGINE FUEL FEED, FORWARD AND ADJACENT TO THE RIGHT BATTERY TRAY BECAME DISLODGED CAUSING THE RIGHT ENGINE TO FLAME OUT. THE CONNECTOR WAS REFITTED AND WIRE LOCKED (AN OPTION IN LEAR JET SIL 28-004). NO LEAKS APPARENT IN SUBSEQUENT GROUND RUN. CAUSE UNKNOWN. SUBMITTER SUGGESTED WIRE LOCKING OF 'WIGGINS' CONNECTORS IN FUEL SYSTEMS BE MANDATORY.