Mega Region of OpenSim has many bugs yet. It might that OAR of Mega Region is not loaded normally.
Please attention that Train and Station in OAR are not object that we made. Those are from http://matangdilis.blogspot.com/ But scripts of Train and Rail was made by us.
Mega Region size is 5x5 Please load this file at Root Region.
Script
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Train
start : /846 start
stop : /846 stop
Plane
Right Turn : Right Cursor Key
Left : Left Cursor Key
Nose Up : Down Cursor Key
Nose Down : Up Cursor Key
Power UP : Page Up key
Power Down: Page Down key