For info on getting/maintaining a TMG rating, have a look at the LASORS documents on the CAA website at:
http://www.caa.co.uk/srg/licensing/f...sp?groupid=292
I'm pretty sure that a Grob 109 is a TMG. A few years ago, the CAA sent me a list of TMG's and the Grob 109/109B was there. The list was actually an extract from JAR FCL-1 but looking at it now, it has changed. The basic definition of a TMG is:
"A motor glider having a certificate of
airworthiness issued or accepted by a JAA
Member State having an integrally mounted, nonretractable
engine and a non-retractable propeller.
JAR FCL-1 can be found at:
http://www.jaa.nl/section1/jarsec1.html
Hope this helps
Regards
G