AD 2021-11-19
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Bell Helicopter Textron Canada Limited | Various | Airworthiness Directives; Bell Textron Canada Limited (Type Certificate Previously Held by Bell Helicopter Textron Canada Limited) Helicopters |
| aircraft | Textron | Various | Airworthiness Directives; Bell Textron Canada Limited (Type Certificate Previously Held by Bell Helicopter Textron Canada Limited) Helicopters |
| aircraft | Bell | Various | Airworthiness Directives; Bell Textron Canada Limited (Type Certificate Previously Held by Bell Helicopter Textron Canada Limited) Helicopters |
Unsafe Condition
A gap between the transmission restraint assembly aft attachment hardware lower washer and the mating airframe truss assembly (truss assembly) clevis lower lug.
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Required Actions
Inspecting the transmission restraint aft attachment hardware installation for a gap and corrective action depending on the inspection results. If a gap is found, installing the hardware with a decreased torque value limit of 20 to 60 inch-pounds (2.3 to 6.8 Nm) plus tare and completing the installation of the attachment point. If the gap is more than 0.020 inch (0.508 mm), removing the nut, washer, and bolt from service and repairing or replacing the truss assembly clevis lower lug in accordance with FAA-approved procedures.
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Compliance Time
Within 100 hours time-in-service (TIS)
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Affected Aircraft
Bell Textron Canada Limited (Type Certificate Previously Held by Bell Helicopter Textron Canada Limited) Model 505 helicopters with a truss assembly part number (P/N) SLS-030-056-015 with a serial number (S/N) listed in Attachment A of Bell Alert Service Bulletin (ASB) 505-19-12, Revision A, dated July 11, 2019.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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