routineRule

AD FAA-2020-0410

Airworthiness Directives; Airbus Helicopters

Summary

The FAA is adopting a new airworthiness directive (AD) for certain Airbus Helicopters Model AS-365N2, AS 365N3, EC 155B, EC155B1, and SA-365N1 helicopters. This AD requires modifying the main gearbox (MGB) tail rotor (T/R) drive flange installation. This AD was prompted by several reported occurrences of loss of tightening torque of the Shur-Lok nut, which serves as a retainer of the T/R drive flange. The actions of this AD are intended to address an unsafe condition on these products.

Directive Details

AD Number

FAA-2020-0410

Document Number

2020-22241

Type

Rule

Publication Date

October 8, 2020

Effective Date

November 12, 2020

Affected Manufacturer

Airbus

Criticality

routine

Emergency

Docket ID

Docket No. FAA-2020-0410

Topics

Air transportationAircraftAviation safetyIncorporation by referenceSafety

Official Documents

View PDF View on Federal Register

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