Conversation so far:
what is known about Alan Kulwicki's death?
Kulwicki died in an airplane crash on Thursday April 1, 1993.
where was Alan Kulwicki going when he died in a plane crash?
He was returning from an appearance at the Knoxville Hooters on the Kingston Pike, on a short flight across Tennessee before the Sunday spring race at Bristol.
how old was Alan Kulwicki when he died?
Died April 1, 1993 (aged 38)
what else is known about Alan Kulwicki's death?
The plane slowed and crashed just before final approach at Tri-Cities Regional Airport.
who else was in the plane with Alan Kulwicki when he died?
All four people on board, including two executives of the Hooters restaurant chain, were killed.
what was the cause of the airplane crash that killed Alan Kulwicki?
The National Transportation Safety Board attributed the crash to the pilot's failure to use the airplane's anti-ice system to clear ice from the engine inlet system.
any other important information about Alan Kulwicki's death?
Kulwicki was buried at St. Adalbert's Cemetery in Milwaukee.

Question: what more information is available about his death?
Self-contained rewrite: what more information is available about Alan Kulwicki's death?