The NTSB incident summary on the crash of the Westwind mentioned two posts above can be read here.
http://libraryonline.erau.edu/online.../AAR88-01S.pdf
It starts at page 9. Accident happend April 4, 1986. Aircraft had malfunction of radar. Flew into a level 6 thunderstorm and crashed.
No mayday call of the crew. Part of the report listed in this image.
