Today I noticed a 10 mph difference between the indicated airspeed on my GRT sport EFIS and my round airspeed indicator ,most notably in slow flight. While at altitude practicing slow flight the EFIS indicated 60 , round gauge 50 ,kind made me unsure of which one to trust once I was back in the pattern.While fueling up today I noticed white gritty stuff on the leading edge of my wings, I wiped my hands across the wings and they where covered in Sea salt, a lot of it, I live and fly at the beach but I've never seen this before . My plane is always in the hanger when not flying and I wash it regularly .Probably not related to the airspeed issue but I can't help but wonder if it's possible that the salt has partially clogged the pitot. Prior to today the speed indicators where sync.
Input?
Input?
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