Airworthiness Directives; Airbus Helicopters Deutschland GmbH Helicopters
airworthiness · Rule · Final rule. · Published 2021-07-14 · Effective 2021-08-18 · 86 FR 37017
Document
Document number
2021-14925
Federal Register citation
86 FR 37017
Type
Rule
Action
Final rule.
Category
airworthiness
Manufacturer
Airbus
Publication date
2021-07-14
Effective date
2021-08-18
FAA docket
Docket No. FAA-2021-0335
Abstract
The FAA is adopting a new airworthiness directive (AD) for all Airbus Helicopters Deutschland GmbH Model MBB-BK 117 A-1, MBB-BK 117 A- 3, MBB-BK 117 A-4, MBB-BK 117 B-1, MBB-BK 117 B-2, and MBB-BK 117 C-1 helicopters. This AD was prompted by a report of sudden severe vibrations and a cracked open blade trailing edge caused by a loosened lead inner weight. This AD requires inspections to determine if any bolted main rotor blades are installed, and replacement of the affected main rotor blades. The FAA is issuing this AD to address the unsafe condition on these products.