EN48:
A 1976 helicopter no matter the type is an antique. Why the Mayo Clinic, possibly the most prestigious medical institution on the planet, is flying personnel around is an old beater like this is a puzzle.
Without commenting on the wisdom or not of flying night VFR in single engine, the age of the ship is irrelevant. On a 1976 ship, every rotating component will have been changed / overhauled many times, and the core airframe stripped, inspected, repaired, painted several times over as well.
Here is a pic of the ill-fated 206. Terribly sad for all involved.
Crash pix here:
Mayo Clinic Hospital Crash - Slideshow Gallery | Jacksonville, FL - St. Augustine, FL - Brunswick, GA | Firstcoastnews.com