Airworthiness Directives; De Havilland Aircraft of Canada Limited (Type Certificate Previously Held by Bombardier, Inc.) Airplanes
airworthiness · Rule · Final rule. · Published 2023-03-14 · Effective 2023-04-18 · 88 FR 15609
Document
Document number
2023-05060
Federal Register citation
88 FR 15609
Type
Rule
Action
Final rule.
Category
airworthiness
Manufacturer
De Havilland
Publication date
2023-03-14
Effective date
2023-04-18
FAA docket
Docket No. FAA-2022-1653
Abstract
The FAA is adopting a new airworthiness directive (AD) for certain De Havilland Aircraft of Canada Limited Model DHC-8-400 series airplanes. This AD was prompted by reports of flap power unit (FPU) pressure switch failures resulting in flap inoperative events. This AD requires replacing the FPU or replacing the FPU pressure switch and reidentifying the FPU. This AD also prohibits the installation of affected parts. The FAA is issuing this AD to address the unsafe condition on these products.