AD 2020-11-07
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | MD | Helicopter Inc., | Airworthiness Directives; MD Helicopter Inc., Helicopters |
Unsafe Condition
Failure of a bolt, which could result in loss of an M/R blade and subsequent loss of control of the helicopter.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Remove from service each bolt with a P/N and S/N listed in paragraph (c) of this AD, and do not install on any helicopter a bolt with a P/N and S/N listed in paragraph (c) of this AD.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 3 months of the effective date of this AD, or at the next overhaul of the M/R assembly, whichever occurs first.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
MD Helicopter Inc., Model 369D, 369E, 369FF, 369H, 369HE, 369HM, 369HS, 500N, and 600N helicopters, with a main rotor (M/R) hub lead-lag bolt (bolt) part number (P/N) 369D21220 with a serial number (S/N) listed in paragraph 1.B. of MD Helicopters Service Bulletin No. SB369D-223, SB369E-122, SB369F-110, SB369H-259, SB500N-060, or SB600N-073, each dated April 19, 2019, installed.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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