Frederik,

Your question is too general, perhaps you could give us some more background
of what you are trying to accomplish and we could define a better answer.
The obvious answer is that the procedures are spelled out in the aircraft
maintenance manual, but I sense you are wanting a non specific answer?

Regards,

Chuck

"Frederik Coppens" wrote in message
...
Can anyone explane me how tracking and balancing is done on EC 120, AS
365 N3 and MD900?

Any help sincerely appreciated.
Frederik C