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  Take care when pressing the plastic output arm onto a
metal output shaft of a servo. If the mating splines are not properly
aligned, the splines in the servo output arm can sustain damage.
The symptoms
of damaged splines can appear similar to those of stripped servo gears.
CONTROL SURFACE FLUTTER MAY
RESULT
So, if you change
a servo due to suspected stripped gears, utilize a fresh servo arm as
well. And, should your model experience a control surface flutter (and
is still in one piece), reduce power and ease the nose up to reduce speed.
Check for controllability and land ASAP.
Do not fly the
model again until the cause of the flutter is determined and eliminated
for certain.
NOTE: BVM uses
JR plastic arms for 90% of our high performance jet applications.
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