E/AB and major alterations

[DrunkenWoodpecker]

Hello

Can you guys help to to figure out this:

Suppose, the initial E/AB airworthiness certificate application specified a Sensenich prop and now a Performance Prop is installed. Is this a major alteration as specified in the FAA limitation letter? ("Any major change as described in § 21.93 ... invalidates the airworthiness certificate....) FAA
had to be notified?

And another one. If the initial application specified the engine as
Lycoming IO360-A1A, and it how has 10:1 pistons... Same thing?

thanks!

 

[PittsDriver68]

 

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[DrunkenWoodpecker]

 

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[Matt-]

 

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[Matt-]

 

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