On Thursday, February 23, 2023, the FAA issued an airworthiness directive (AD) 2023-04-08 superseding a recent mandatory service bulletin from Continental Aerospace Technologies, MSB23-01A.
This AD affects an estimated 2,176 crankshaft assemblies.
Crankshaft Counterweights and the Potential for Catastrophic Failure
The discovery of a potential crankshaft flaw in some Continental engines highlights why they must function properly.
Key Takeaways:
- The FAA issued Airworthiness Directive (AD) 2023-04-08, superseding Continental's MSB23-01A, to address an unsafe condition in specific aircraft engines.
- This mandatory directive affects an estimated 2,176 Continental 360, 470, 520, and 550 series engines manufactured between June 1, 2021, and February 7, 2023, requiring compliance regardless of operating hours.
- The AD targets incorrectly installed crankshaft counterweight retaining clips, a defect that could lead to catastrophic engine damage, seizure, or loss of aircraft, and requires compliance "before further flight."
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