EASA AD US-2020-14-01
Main Rotor - Spindle to Yoke Bolts - Removal
Summary
Federal Aviation Administration Airworthiness Directive 2020-14-01 is a final rule addressing Bell Textron Inc. Model 214ST helicopters equipped with specific spindle to yoke bolts part number 214-010-262-103 and certain serial numbers. This directive mandates removal of bolts with nonconforming external thread root radii to prevent unsafe conditions. It prohibits installation of the affected bolts on any helicopter to ensure continued airworthiness.
What Changed
This new airworthiness directive introduces a mandatory removal of identified nonconforming spindle to yoke bolts within 25 hours time-in-service and prohibits their installation on any Bell Model 214ST helicopter. It updates the manufacturer name to Bell Textron Inc. and clarifies the applicability and installation prohibitions. The directive supersedes previous service bulletin recommendations by requiring immediate bolt removal rather than periodic torque checks.
Why It Matters
This directive is critical for aviation professionals as it addresses a potential failure point that could lead to spindle separation from the yoke, resulting in loss of helicopter control. Operators, maintenance organizations, and compliance teams must ensure affected bolts are removed promptly to maintain safety and regulatory compliance. Failure to comply could result in unsafe flight conditions and regulatory penalties.
What To Do
Operators of Bell Model 214ST helicopters must identify and remove from service all affected spindle to yoke bolts within 25 hours time-in-service from the directive's effective date. After August 11, 2020, installation of any affected bolt is prohibited. Maintenance and compliance personnel should update records accordingly and coordinate with Bell Textron for replacement parts as needed.
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