I
have had this problem intermittently for the past year
or so, but now it is becoming
a regular occurrence. When I go above 160KIAS I get a
loud buzzing sound throughout
the airframe. I cannot feel it through the control
stick. I can make the buzz
stop by loading the wing slightly with g’s or by
extending the flaps
about ¾”.
There
is a line of rub marks on the top side of the flaps
where they meet the
trailing edge wing skin. I initially thought the skin
was vibrating since it is
fairly flexible there, but now I’m not so sure. If I
partially extend the
flaps on the ground I can feel a fair amount of
up-and-down play in the flap
hinges. I haven’t had a chance to disassemble the hinge
pin yet.
Has
anyone else had this problem? If so, what was the cause
and how did you fix it?