What was found
ENROUTE, EXPERIENCED A FAILURE ON THE RT ENGINE. RED MASTER WARNING LIGHT FLASHING, FUEL LOW PRESSURE, OIL LOW PRESSURE LIGHT AND A YAW TO THE RT. FAILURE WAS CONFIRMED WITH INSTRUMENTS. COMPLETED CHECKLIST. AN AIR-START WAS CARRIED OUT ACCORDING TO ABNORMAL CHECKLIST. RESTART WAS SUCCESSFUL & THE FLIGHT COMPLETED WITH BOTH ENGINES. AFTER TOUCHDOWN, DURING TAXI, ENGINE FAILED AGAIN WITH FUEL LOW PRESSURE, OIL LOW PRESSURE ANNUNCIATOR & A AMBER FUEL SHUTOFF VALVE ANNUNCIATOR LIGHT. REPLACED THE FIREWALL SHUTOFF SYS TEE HANDLE ASSY, ACFT HAS CONTINUED TO OPERATE WITH NO FURTHER INCIDENTS.