We are adopting a new airworthiness directive (AD) for certain Bombardier, Inc., Model DHC-8-401 and -402 airplanes. This AD was prompted by the discovery of cracking on two test spoiler power control unit (PCU) manifolds during testing by the manufacturer. This AD requires replacement of affected spoiler PCUs. We are issuing this AD to address the unsafe condition on these products.
Document
Airworthiness Directives; Bombardier, Inc., Airplanes
We are adopting a new airworthiness directive (AD) for certain Bombardier, Inc., Model DHC-8-401 and -402 airplanes. This AD was prompted by the discovery of cracking on two tes...
Legal Citation
Federal Register Citation
Use this for formal legal and research references to the published document.
82 FR 44898
Web Citation
Suggested Web Citation
Use this when citing the archival web version of the document.
“Airworthiness Directives; Bombardier, Inc., Airplanes,” thefederalregister.org (September 27, 2017), https://thefederalregister.org/documents/2017-20213/airworthiness-directives-bombardier-inc-airplanes.