At 09:45 AM 5/12/2005, you wrote: >The application of the rules have changed with regards to certified >engines in experimentals. They used to be exempt from Airworthyness >Directives, but now the FAA has chosen to enforce the ADs. (...snip...) A >certified engine on an experiemental is now required to comply with >ADs. Not really a change in regulation by the FAA, but instead is a >change in the interpretation of the regulations.
Could this be a regional interpretation? Can anyone else comment? >Having said that, the vast majority of ADs exist for safety reasons and >are based on long term experience with failure of that engine or part. It >is usually in your best interest to install the applicable ADs anyway. I could not agree more. >Here's where it gets into some of the nits that people will undoubtedly >want to pick. If you are using a certified part, the ADs apply. For >instance, many of the dual ignition revmaster engines use the Bendix >single drive dual magneto. If that magneto is the same part number as the >ones on a certified engine, or the serial number falls into the range of >serial numbers for that type for which an AD has been issued, that AD also >applies to that magneto on the Revmaster engine. > >OK, the question was posed earlier about building your own engine using a >Continental crank and case, but Chevy pistons. In this example, any AD >that applies to the crank and case would apply. Any AD that applies to >the piston, would not. However, as soon as you install a non-certificated part on a certificated engine without proper paperwork (such as Form 337 or STC), the original certification becomes invalid if it is used in a certificated application. A non-certificated engine should not need to comply with the requirements of certification. Simple solution, remove the original data plate and install your own. Comply with the ADs and service bulletins as you see fit. Don Reid - donreid "at" peoplepc.com Bumpass, Va Visit my web sites at: AeroFoil, a 2-D Airfoil Design And Analysis Computer Program: http://aerofoilengineering.com KR2XL construction: http://aerofoilengineering.com/KR/KR2XL.htm Aviation Surplus: http://aerofoilengineering.com/PartsListing/Airparts.htm EAA Chapter 231: http://eaa231.org Ultralights: http://usua250.org VA EAA State Fly-in: http://vaeaa.org
