Airworthiness Directives; Bombardier, Inc. Airplanes
airworthiness · Rule · Final rule. · Published 2012-03-21 · Effective 2012-04-25 · 77 FR 16428
Document
Document number
2012-6531
Federal Register citation
77 FR 16428
Type
Rule
Action
Final rule.
Category
airworthiness
Publication date
2012-03-21
Effective date
2012-04-25
FAA docket
Docket No. FAA-2011-1088
Abstract
We are adopting a new airworthiness directive (AD) for certain Bombardier, Inc. Model DHC-8-400 series airplanes. This AD was prompted by reports of difficulties in opening the airstair door. This AD requires inspecting the structure and gearbox drain paths for blockages by sealant, and removing any blockages. We are issuing this AD to detect and correct drain paths blocked by sealant, resulting in an airstair door that is unable to be opened, which could hinder evacuation in the event of an emergency.