On Feb 20, 8:35*am, jcarlyle wrote:
Probably what's happening is that the weather sealing around the vent
flap has failed, leaving a small gap when the vent is closed. Have you
checked the sealing of the vent when it's closed?

-John

I'll check that seal if I can. I'm going to try an re-create the
issue on the ground with a shop vac or leaf blower. Of course I might
not be able to hear the vent noise over the motor then :-)

It's not the canopy seal. That used to whistle right by my ear until
I replaced the seal and added foam.

Thanks
Todd