AD 2018-16-51
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Textron | Canada Limited | Airworthiness Directives; Bell Helicopter Textron Canada Limited Helicopters |
| aircraft | Bell | Helicopter Textron Canada Limited | Airworthiness Directives; Bell Helicopter Textron Canada Limited Helicopters |
Unsafe Condition
Two reports of T/R gearbox assemblies loosely attached to the gearbox support, which could lead to structural damage and possible loss of control of the helicopter.
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Required Actions
Inspecting the T/R gearbox installation for looseness, visually inspecting the T/R gearbox retaining hardware and support attachment point areas, and torque inspecting each gearbox retaining nut. Depending on the inspection results, replacing or repairing the affected parts in accordance with FAA-approved procedures.
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Compliance Time
Before further flight
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Affected Aircraft
Bell Helicopter Textron Canada Limited Model 429 helicopters
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Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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