AD 2025-06-51
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Textron | Canada Limited | Airworthiness Directives; Bell Textron Canada Limited Helicopters |
| aircraft | Bell | Textron Canada Limited | Airworthiness Directives; Bell Textron Canada Limited Helicopters |
Unsafe Condition
Deformation and/or improper pin engagement in the knuckles of the door hinge on the aft movable ballast box assembly, part number SLS-706-201-007, could lead to ballast weights escaping the ballast box and striking the tail rotor assembly, resulting in tail rotor blade damage, loss of tail rotor thrust, severe vibrations, and loss of control of the helicopter.
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Required Actions
Remove all ballast weights from the aft movable ballast box assembly, part number SLS-706-201-007, and prohibit the use of ballast weights within the aft movable ballast box assembly.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Before further flight
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Affected Aircraft
Bell Textron Canada Limited Model 505 helicopters, serial numbers 65011 and subsequent, with ballast kit part number SLS-706-201-007 installed.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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