WHBM
I remember the fixed wing side and the subtle change of name !
It was originally called Court Line Helicopters and wholly owned by CL.
After the collapse it was sold off I think to a local group and the name changed to Court and I think Court Air was added with the Fixed wing.
I seem to remember some fixed wing before the Convairs
maybe Beech or Swearingen
At the time of CL demise the Chief engineer was John Bourne