vinpaul wrote:


does the faa still do center-line-thrust twin ratings? any designated
flight examiners available?

There never was such a rating. You have to get a regular multiengine
rating, but if you take your checkride in a 337 you're get a centerline
thrust only restriction on your certificate. If you take your ride
in a regular twin, you won't have the restriction (and you can still
flight the mixmaster if you want).