Airworthiness Directives; Airbus Helicopters Deutschland GmbH Helicopters
airworthiness · Rule · Final rule. · Published 2021-05-20 · Effective 2021-06-24 · 86 FR 27268
Document
Document number
2021-10605
Federal Register citation
86 FR 27268
Type
Rule
Action
Final rule.
Category
airworthiness
Manufacturer
Airbus
Publication date
2021-05-20
Effective date
2021-06-24
FAA docket
Docket No. FAA-2021-0143
Abstract
The FAA is adopting a new airworthiness directive (AD) for certain Airbus Helicopters Deutschland GmbH Model BO-105A, BO-105C, BO- 105S, and BO-105LS A-3 helicopters. This AD was prompted by the FAA's determination that aging of the elastomeric material in a tension torsion strap (TT-strap) could affect the structural characteristics of the TT-strap. This AD requires replacement of certain TT-straps with serviceable parts and implementation of a new storage life limit for TT-straps, as specified in a European Aviation Safety Agency (now European Union Aviation Safety Agency) (EASA) AD, which is incorporated by reference. The FAA is issuing this AD to address the unsafe condition on these products.