CORONA (CNS) - Four people were killed Wednesdy when a single-engine airplane crashed just northeast of Corona Municipal Airport, triggering a fire.The plane crashed shortly after noon as the pilot was trying to depart Runway 7 at the non-towered airport."The unidentified aircraft crashed under unknown circumstances," Federal Aviation Administration spokesman Ian Gregor told City News Service."The aircraft was destroyed."According to Corona police, fire crews reached the crash site within 10 minutes and found the plane in flames, which were doused after burning about a quarter-acre of brush.No homes or other structures were in the immediate vicinity.A Corona Fire Department spokesman said the aircraft had been topped off with gasoline, suggesting that with all seats
