airworthiness · Rule · Final rule. · Published 2020-08-06 · Effective 2020-09-10 · 85 FR 47635
Document
Document number
2020-17124
Federal Register citation
85 FR 47635
Type
Rule
Action
Final rule.
Category
airworthiness
Publication date
2020-08-06
Effective date
2020-09-10
FAA docket
Docket No. FAA-2019-0987
Abstract
The FAA is adopting a new airworthiness directive (AD) for certain Bombardier, Inc., Model CL-600-2B19 (Regional Jet Series 100 & 440) airplanes. This AD was prompted by reports that during airplane wing fatigue testing, fatigue cracks were found on the lower right- hand-side wing plank at the end of the integrally machined stringers, which led to a determination that new or more restrictive airworthiness limitations are necessary. This AD requires, for certain airplanes, revising the existing maintenance or inspection program, as applicable, to incorporate new or more restrictive airworthiness limitations. The FAA is issuing this AD to address the unsafe condition on these products.