Gulfstream IV / G350 / G450
Flight Crew Air Transport Pilot (ATP)
Aircraft Equipment Problem Critical; Inflight Event / Encounter Fuel Issue
Flight Crew Landed As Precaution; Flight Crew Landed in Emergency Condition; Flight Crew Returned To Departure Airport
Aircraft
Shortly after departure; I was notified by the flight attendant that a leakage of fuel was observed by one of the passengers. Upon a brief inspection from the cabin; I determined that we had a significant fuel leak coming from the right wing. The leak appeared to be coming between the right aileron and the outboard portion of the wing. At that point; an emergency was declared due to the fact I had no idea what the cause of the leak was. We turned around and landed uneventfully where we were met by emergency personal. I was the captain on the flight performing PNF (Pilot Not Flying) /PM (Pilot Monitoring) duties at the time of the emergency.
Gulfstream IV Captain reported returning to departure airport after a fuel leak was noticed by a passenger.