Hi all,
I'd like to have your opinion concerning a strange behavior on my engine.
It's a month that the engine loses around 100rpm, than returns to normal two or three times in about10 seconds. This behavior is repeated every more or less 20 min.
The aircraft just comes out from it's 100h inspection bya Rotax certified mechanic, but the problem is still there.

https://youtu.be/H7mFEEmTCEI

In this video an extract of a flight in Italian-Swiss Alps, where the problem emerges 4 times, the first just after T/O, the others at hight altitudes. Take a look to the instruments and engine sound.
Our first suspects are magnets or problems to constant speed prop regulator.
What is your opinion?

Thanks for your replies
Antonio
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