AD 2002-13-05
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | MD | Various | Airworthiness Directives; MD Helicopters, Inc. Model 369D, 369E, 369F, and 369FF Helicopters |
Unsafe Condition
Bolts of inadequate grip length were specified to attach the tail rotor gearbox to the tailboom, which could lead to loss of the tail rotor gearbox and subsequent loss of control of the helicopter.
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Required Actions
Inspect the part number (P/N) of the bolts attaching the tail rotor gearbox to the tailboom. Replace any bolt with inadequate grip length with an airworthy bolt. Determine the number of bolt threads protruding from each nutplate and add an additional washer if more than four threads protrude.
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Compliance Time
Before further flight.
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Affected Aircraft
MD Helicopters, Inc. Model 369D, 369E, 369F, and 369FF helicopters with a tailboom modified according to Aerometals 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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