Just happened to come across NTSB website on older wrecks. happened to hit on May of 1965. 3 super cub wrecks spraying in Montana alone in a couple weeks.
There are several ways to get there. Some to get specific N# and some to get specific date etc. the page I was on was: www.ntsb.gov/ntsb/Month.asp
that will give you an index of any month you want to look up.
can't remember how to get specific N # but if you type that n# up on yahoo, it will take you to the proper site.