airworthiness · Rule · Final rule. · Published 2019-06-06 · Effective 2019-07-11 · 84 FR 26334
Document
Document number
2019-11830
Federal Register citation
84 FR 26334
Type
Rule
Action
Final rule.
Category
airworthiness
Publication date
2019-06-06
Effective date
2019-07-11
FAA docket
Docket No. FAA-2018-0801
Abstract
We are superseding Airworthiness Directive (AD) 2008-24-14, which applied to all Bombardier, Inc., Model CL-600-2B19 (Regional Jet Series 100 & 440) airplanes. AD 2008-24-14 required revising the instructions for continued airworthiness to incorporate certain airworthiness limitations for the main landing gear (MLG) trunnion fitting assembly. This AD requires revising the maintenance or inspection program, as applicable, to incorporate certain airworthiness limitations (AWLs). This AD also requires reworking the trunnion fitting in order to meet new structural safe-life limits. This AD was prompted by reports of cracks on the MLG trunnion fitting during fatigue testing; the introduction of new AWL tasks with revised inspection, modification, and safe-life requirements; and a determination that the trunnion fitting lower flange and both forward and aft bore holes are also subject to fatigue cracking. We are issuing this AD to address the unsafe condition on these products.