My dad had similar thing happen to him many years ago at the Nationals with an old Simjet 23. It seized and kept chucking fuel in the engine and it then ignited. You could see both the inlets as it was coming in to land were alight inside, flames coming out of wheel wells. He landed it at his feet and flames were put out. Back of fuz was a sorry state. He totally resprayed the F15 and someone later purchased. Dont think they had been to the Nats though!
Laura