Stick

All of the IO 360 engines listed are the 180 HP variety You state "These propellers and engines could be installed on, but not limited to:" would that not mean the propellers and engines on the list of affected aircraft. The paragraph I posted seems to specifically exclude the 200 HP engines. We changed the AD to clarify the callouts for the engine and airplane model listing. "These propellers and engines could be installed on, but not limited to:" This means this engine propeller combination may be installed on airframes not listed such as home builds, ie: RV series or one off prototypes. I do not believe the would provide a list and intentionally leave of every airplane built in the 60's and 70's with a 200 HP Lycoming and the stated propeller. IE: Arrow, Sierra, Cardinal RG etc. This is the poorest example of an AD I have seen in my 40+ years in aviation.

https://rgl.faa.gov/Regulatory_and_Guidance_Library/rgAD.nsf/0/6b6b68153b98376a8625765c005290eb/$FILE/2009-22-03.pdf Clarification Needed in Engine/Model Listing One commenter states that the applicable model list of aircraft and engines seems to indicate that all of the aircraft/engines mentioned are 180 horsepower, yet the propeller applicable model list covers propellers installed on counterweighted angle valve engines which are 200 horsepower. Specific inclusion or exclusion of counterweighted engines and valve configuration (whichever is the case) needs to be incorporated for clarification; or the aircraft/engine model list needs to be finite instead of, ''not limited to.'' We agree that clarification is needed to define the engine models and airplane models that are affected by this AD. We changed the AD to clarify the callouts for the engine and airplane model listing If you look at the engine and aircraft listing the IO360 A1A is not listed, The M2oF is also not listed the M20E is listed incorrectly as a Master 21 in one place and as having a 180 HP engine in another The only 200 HP engines listed are the Seneca 1 , No other aircraft with the 200 are on the list per the paragraph above. the B,C and G models are correctly listed with their 180 HP engines. I'm just wondering why E and F model owners are dishing out money every 100 hours when the AD apparently dosen't apply to their aircraft?

That one applies to 300+ HP engines

Can anyone explain to me how this AD affects the E and F models? Seems a lot of people are paying for eddy current inspections every 100 hours that are not required.