Airworthiness Directives; MD Helicopters, LLC Helicopters
Transportation Department · Signed
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Current
Signed
Published Oct 23, 2026.
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Takes effect Nov 27, 2026
Public comment window: 31 days left.
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- ProposedPublished Oct 23, 2026
- SignedStatus: Signed · Published Oct 23, 2026
- In effectEffective Nov 27, 2026
- ChallengedNo challenge record stored beyond status. See the Federal Register source for litigation history.
- ClosedLast effective date Nov 27, 2026
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Effective Nov 27, 2026
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AS PUBLISHED
The FAA is adopting a new airworthiness directive (AD) for certain MD Helicopters, LLC (MDHI) Model 369D, 369E, 369F, 369FF, 369H, and 500N helicopters. This AD was prompted by a report of mechanical damage to the main transmission drive shaft coupling (coupling). This AD requires a one-time visual inspection of the couplings for cracks of the splines and, depending on the results, replacement of the couplings. The FAA is issuing this AD to address the unsafe condition on these products.
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- Federal Register entryPrimary record
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