Small Transport
Flight Crew Air Transport Pilot (ATP); Flight Crew Instrument; Flight Crew Multiengine
Situational Awareness; Time Pressure
Aircraft Equipment Problem Critical; Deviation / Discrepancy - Procedural Published Material / Policy; Ground Event / Encounter Fuel Issue
Flight Crew Returned To Gate; General Evacuated; General Flight Cancelled / Delayed; General Maintenance Action
Aircraft; Procedure
While taxiing to Runway X; I noticed a GEN annunciator light on for the right engine. I then noticed the right engine had stopped. I stopped on taxiway close to the hold short line of Runway X. I notified Tower that one of my engines had failed and that we may need to get a ride back to the gate. I then told ZZZZ Ops that we may need a ride back to the gate. I made one attempt to restart the engine to taxi back to the gate; but it wouldn't start (it was likely flooded at this point). I told my two passengers that we were going to get a ride back to the gate. At about this time I noticed a stream of fuel coming from the right engine cowl drain tube. Out of an abundance of caution I decided it would be best to wait for our transportation away from the aircraft. I performed the ground evacuation memory items and walked the passengers to the grass off of [the] taxiway and called Ops. The van arrived within a few minutes of evacuating the aircraft and we were taken back to the gate. At this time I'm unsure as to why the right engine failed. As for the stream of fuel; it is likely due to the fuel pump remaining on after the engine failed. Regardless of whether or not this was the source of the fuel stream; I became distracted while coordinating transportation and forgot to turn the fuel pump off. In the future I should first focus on the aircraft and its systems before dealing with things like coordinating transportation. If the fuel pump were turned off; there is a possibility I could have avoided the evacuation part of this event.
Pilot reported engine failure during taxi and elected to evacuate the aircraft because of fuel streaming out of the engine drains.