Summary
We are adopting a new airworthiness directive (AD) for Bell Model 407 helicopters. This AD requires repetitive inspections of the tail rotor (TR) driveshaft segment assemblies and a torque check of the TR adapter retention nuts. This AD was prompted by a report of an in- flight failure of the TR drive system. The actions of this AD are intended to detect and correct an unsafe condition on these products.
Directive Details
AD Number
FAA-2017-0667
Document Number
2018-10491
Type
Rule
Publication Date
May 21, 2018
Effective Date
June 25, 2018
Affected Manufacturer
Bell Helicopter Textron Canada Limited (Bell)
Criticality
important
Emergency
No
Docket ID
Docket No. FAA-2017-0667
Topics
Official Documents
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