"Core" Exchange Definition

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ktenkate
ktenkate's picture
"Core" Exchange Definition

Is there a standard definition for "core" when using a Lycoming engine for an exchange? If so, where can it be found?

Thanks,

Kevin

 

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navajoflyer
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Lycoming has a Service Letter L250A that defines what they consider to be an acceptable core.

ktenkate
ktenkate's picture

Excellent. Thanks, Kevin

Stacheair1
Stacheair1's picture

To answer your question about Lycoming engines ONLY, you should read the Lycoming Service Letter 250A
http://www.lycoming.com/Portals/0/techpublications/serviceletters/SL%20L...(7-29-2011)/Lycoming%20Engines%20Exchange%20Engine%20Core%20Policy.pdf

There are many different types of “cores” so you should read this document and determine what type of engine case and type you have. There is no one definition of a core and each manufacture is different on how they refer to a core engine. Below is a sample of what the Service Letter 250A states in part.

“The returned exchange engine core must be the same engine model and configured in a manner similar to the replacement engine. For example: if the replacement engine included a fuel pump, the exchange engine core must be returned with the same fuel pump that was last installed and operating during the “active” period described above, if the replacement engine included an alternator, the exchange engine core must be returned with the same alternator that was last installed and operating during the “active” period described above. The same thought process or “test” if you prefer, depicted in the two previous examples will be applicable to the entire exchange engine core including but not limited to all starting, charging, fuel delivery and ignition systems/components.”

There is not an easy answer to this question, but it all depends what core you are talking about.

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