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Lycoming "Emergency" AD

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This list came from the FAA via email today:
2017-16-11 - Engine/Lycoming Engines/AEIO-320-D1B
2017-16-11 - Engine/Lycoming Engines/AEIO-320-D2B
2017-16-11 - Engine/Lycoming Engines/AEIO-360-B1G6
2017-16-11 - Engine/Lycoming Engines/AEIO-360-H1B
2017-16-11 - Engine/Lycoming Engines/AEIO-540-D4A5
2017-16-11 - Engine/Lycoming Engines/AEIO-540-L1B5
2017-16-11 - Engine/Lycoming Engines/AEIO-580-B1A
2017-16-11 - Engine/Lycoming Engines/HIO-360-G1A
2017-16-11 - Engine/Lycoming Engines/HO-360-C1A
2017-16-11 - Engine/Lycoming Engines/IO-320-B1A
2017-16-11 - Engine/Lycoming Engines/IO-360-A1A
2017-16-11 - Engine/Lycoming Engines/IO-360-B4A
2017-16-11 - Engine/Lycoming Engines/IO-360-C1C
2017-16-11 - Engine/Lycoming Engines/IO-360-L2A
2017-16-11 - Engine/Lycoming Engines/IO-360-M1A
2017-16-11 - Engine/Lycoming Engines/IO-360-M1B
2017-16-11 - Engine/Lycoming Engines/IO-540-AB1A5
2017-16-11 - Engine/Lycoming Engines/IO-540-AE1A5
2017-16-11 - Engine/Lycoming Engines/IO-540-K1B5
2017-16-11 - Engine/Lycoming Engines/IO-540-K1F5
2017-16-11 - Engine/Lycoming Engines/IO-540-K1G5
2017-16-11 - Engine/Lycoming Engines/IO-540-K1G5D
2017-16-11 - Engine/Lycoming Engines/IO-540-K1J5
2017-16-11 - Engine/Lycoming Engines/IO-540-K1K5
2017-16-11 - Engine/Lycoming Engines/IO-540-K2A5
2017-16-11 - Engine/Lycoming Engines/IO-540-M1C5
2017-16-11 - Engine/Lycoming Engines/IO-540-S1A5
2017-16-11 - Engine/Lycoming Engines/IO-540-V4A5
2017-16-11 - Engine/Lycoming Engines/LO-360-A1G6D
2017-16-11 - Engine/Lycoming Engines/LO-360-A1H6
2017-16-11 - Engine/Lycoming Engines/O-235-L2A
2017-16-11 - Engine/Lycoming Engines/O-235-L2C
2017-16-11 - Engine/Lycoming Engines/O-235-N2C
2017-16-11 - Engine/Lycoming Engines/O-320-A2B
2017-16-11 - Engine/Lycoming Engines/O-320-B2B
2017-16-11 - Engine/Lycoming Engines/O-320-B2C
2017-16-11 - Engine/Lycoming Engines/O-320-B2D
2017-16-11 - Engine/Lycoming Engines/O-320-D2A
2017-16-11 - Engine/Lycoming Engines/O-320-D2G
2017-16-11 - Engine/Lycoming Engines/O-320-D2J
2017-16-11 - Engine/Lycoming Engines/O-320-D3G
2017-16-11 - Engine/Lycoming Engines/O-360-A4M
2017-16-11 - Engine/Lycoming Engines/O-360-J2A
2017-16-11 - Engine/Lycoming Engines/O-540-L3C5D
2017-16-11 - Engine/Lycoming Engines/TIO-540-A2C
2017-16-11 - Engine/Lycoming Engines/TIO-540-AB1AD
2017-16-11 - Engine/Lycoming Engines/TIO-540-AF1B
2017-16-11 - Engine/Lycoming Engines/TIO-540-AH1A
2017-16-11 - Engine/Lycoming Engines/TIO-540-AJ1A​
 

These are different. What was discussed within the quote was a Service Bulletin issued by Lycoming and the link at the top of this thread is an Airworthiness Directive.

Two completely different things, even if they cover the same parts.

Service Bulletins are optional but Airworthiness Directives are mandatory. (I am not going to comment on the when someone may follow a Service Bulletin or not. Other than to say, Lycoming issuing a "Mandatory" Service Bulletin means nothing, because there is no regulation behind a "Mandatory" SB.)
 
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These are different. What was discussed within the quote was a Service Bulletin issued by Lycoming and the link at the top of this thread is an Airworthiness Directive.

Two completely different things, even if they cover the same parts.

Service Bulletins are optional but Airworthiness Directives are mandatory. (I am not going to comment on the when someone may follow a Service Bulletin or not. Other than to say, Lycoming issuing a "Mandatory" Service Bulletin means nothing, because there is no regulation behind a "Mandatory" SB.)

You are just splitting hairs. The AD came straight from the SB.

Tim
 
Gentlemen, Gentlemen,

If your engine was built (new), repaired, or "...overhauled between November 2015 and February 2017" AND the engine model number appears on the list in the previous post, then you should be concerned about this. If you have any concerns about how this might affect your engine, please consult Lycoming or a reputable engine shop.

Since this is a parallel thread, this thread is now closed. Please refer to the other thread linked above.
 
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