AD Amdt-39-13022
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | MD | Various | Airworthiness Directives; MD Helicopters, Inc. Model 369D, 369E, 369F, and 369FF Helicopters |
Unsafe Condition
Loss of a tail rotor gearbox due to bolts of inadequate grip length 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
Identify the part number (P/N) of the bolts that attach the tail rotor gearbox to the tailboom. Replace any bolt of inadequate grip length with an airworthy bolt. Add an additional washer if more than four threads protrude from the nutplate. Reapply a slippage mark to each bolt regardless of the outcome of the required torque test.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
MD Helicopters, Inc. Model 369D, 369E, 369F, and 369FF helicopters with certain tailboom serial numbers and parts modified in accordance with Supplemental Type Certificate (STC) SH5055NM or SH4801NM.
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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