Airworthiness Directives; MD Helicopters, LLC Helicopters
The comment period closed Aug 17, 2026.
The FAA proposes to adopt a new airworthiness directive (AD) for certain MD Helicopters, LLC (MDHI) Model 369D, 369E, 369F, 369FF, 369H, and 500N helicopters. This proposed AD was prompted by a report of mechanical damage to the main transmission drive shaft coupling (coupling). This proposed AD would require a one-time visual inspection of the couplings for cracks of the splines and, depending on
Summary from the Federal Register.
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Full history
- Jul 1, 2026
Rule published
Airworthiness Directives; MD Helicopters, LLC Helicopters
Transportation Department
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