> Sent: Monday, March 28, 2022 at 2:00 PM
> From: "bjoenunley--- via KRnet" <[email protected]>
> To: "KRnet" <[email protected]>
> Cc: [email protected]
> Subject: KRnet> Engine Replacement
>
> Who has a test flight program for an engine replacement? Does anyone have
> experience getting engine replacement approved? Any advice is appreciated.
>
> I am replacing a rotory engine with a 360.
>
> Joe Nunley
> Yellow River Airport Florida
Joe,This depends on whether you are replacing the engine with the same model
engine, a similar model, or something completely different. And it is purely
subjective with the FAA Inspector at your local FSDO.
If you are using the same model engine, you don't need to do anything more than
a logbook entry. If you are changing to a different model engine, then write up
the change, the call your local FSDO and ask to speak with an airworthiness
inspector. They will have you mail or email a copy of the modifications you
made, then will assign you a new test period. In most cases, the phase 1 test
period is 5 hours for an engine change. Or it can be up to as much as 25
hours. That is at the descretion of the airworthiness inspector based on
whether he thinks this change will significantly impact the performance of the
plane. They will not want to come see it. Your description is sufficient and
they will assign a phase 1 test period based on your description of the change.
As many of you know, I changed engines, tail, added flaps, added numerous
fairings, changed props several times, etc. My KR went back into Phase 1
testing several times over the years. All of them were 5 hour test periods.
-Jeff Scott
Arkansas Ozarks
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