AD 2014-16-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | MD | Various | Airworthiness Directives; MD Helicopters, Inc., Helicopters |
Unsafe Condition
A cracked main rotor upper hub assembly (upper hub) could result in failure of the upper hub 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
Clean the upper hub inspection areas and perform an eddy current inspection of the upper hub for a crack. If a crack is found, replace the upper hub with an airworthy upper hub before further flight.
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Compliance Time
Within the next 25 hours time-in-service (TIS) or at the next annual inspection, whichever occurs first.
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Affected Aircraft
MD Helicopters, Inc., Model MD900 helicopters, serial numbers 900-00008 through 900-00140, with main rotor upper hub assembly (upper hub) part number 900R2101006-105, -107, -109, or -111 installed, certificated in any category.
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Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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