First crash tail jerks right to left speraticly.

[NickM]

Ok after replacing the broken parts all looks good. Tried spooling up and get it into a hover then all of a sudden a quick jerk to the right then left then back right then right again. Not always in that order. Do you think I stripped a tail servo gears? How would I know? The elevator servo was stripped I know because when its powered an I turn the horn it made the sound like one of those geared hot wheels u would pull back wards and when u went to far. That sound. Anyway I bought a new servo there. But that didn't fix my jolting. Can the Ar7200BX reset or something after a crash? Any help would be appreciated

[NickM]

I bought a new set of gears for the elevator servo and another servo. Installed the new servo so can I use the new gears in the tail servo

[bundydeity]

isnt the tail servo see through? run it on the bench (with throttle hold on!), move the tail to all extremes, see if you can see any missing teeth. use a magnifying glass if that helps
or, open the casing and check the gears to be sure