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This AD and final rule is effective February 23, 2023 and affects any crankshaft assembly on a Continental Engine.
While there is only one way to interpret this statement, it is in fact wrong. The AD applies only to crankshafts with removable counterweights, and I will go out on a limb and say that excludes all horizontally opposed 4 cylinder engines right off the bat. It is further restricted to only those crankshafts serviced since sometime in 2021, or, apparently, manufactured within a similar time frame.
I guess they were going for sensationalism in the headline...
Crazy situation.
1. Yes only engines with counterweights......(i.e. large bore engines)
2. Continental isn't saying why, what, when how........but were I a guessing man......somebody at the factory didn't install the retaining C clip properly. Sure has grounded a bunch of aircraft!
