Airworthiness Directives; Airbus Helicopters Deutschland GmbH Helicopters
airworthiness · Rule · Final rule. · Published 2021-04-02 · Effective 2021-05-07 · 86 FR 17275
Document
Document number
2021-06771
Federal Register citation
86 FR 17275
Type
Rule
Action
Final rule.
Category
airworthiness
Manufacturer
Airbus
Publication date
2021-04-02
Effective date
2021-05-07
FAA docket
Docket No. FAA-2020-0801
Abstract
The FAA is superseding Airworthiness Directive (AD) 2017-07-08 for Airbus Helicopters Deutschland GmbH (Airbus Helicopters) Model MBB- BK 117 D-2 helicopters. AD 2017-07-08 required repetitively inspecting each engine mount elastomeric bushing (elastomeric bushing). Since the FAA issued AD 2017-07-08, Airbus Helicopters has designed an improved engine mount metal bushing (metal bushing). This new AD retains the inspection requirements of AD 2017-07-08 and requires replacing each affected engine mount bushing with an improved engine mount bushing, while also requiring repetitive inspections of the improved engine mount bushing. This AD also prohibits installing an elastomeric bushing on any helicopter. The actions of this AD are intended to address an unsafe condition on these products.