Airworthiness Directives (ADs)
85-412-017A
The aircraft owner or operator shall comply with Airworthiness Directives issued by the CAA or the aeronautics authority of the State of Design (SoD) of the aviation products, appliances and parts, and take all necessary actions thereto.
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Issue Date
- 1997/06/14
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Applicability
- Bell 412, 412EP
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Model Number
- Bell 412
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CAA AD Number
- 85-412-017A
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Aeronautics Authority of Original AD
- FAA
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Original AD Number
- 97-11-04
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Effective Date
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Subject
- To prevent fatigue failure of the mast and spline plate, which could result in failure of the main rotor system and subsequent loss of the helicopter
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Reference Publications (Revision/ATA/SB)
- ASB 412-94-81
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Remarks
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Download
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