John wrote:

What's the difference in the shapes of these mylars.

My manual calls for different "forms" depending on where the mylar seal
is located.....ie top vs bottom of wing.


How often should one replace mylar seals on the wings?

Is this judgement based on hours flown or just time since it was last
replaced?

Your manual might say; mine requires it only on condition. The mylar
fairings on my ASH 26 are 9 years old and appear as new.

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Eric Greenwell
Washington State
USA