AircraftDirectives
Airworthiness Directive

AD 2023-05-01 88 FR 15609

Federal Aviation Administration · 14 CFR part 39

FR document
2023-05060
Amendment
39-22370
Published
2023-03-14
Models covered
1
Last live check
2026-08-17

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AD

2023-05-01

FR doc 2023-05060 · 88 FR 15609

AD 2023-05-01Published 2023-03-14Effective 2023-04-18

Requires replacing the FPU or replacing the FPU pressure switch and reidentifying the FPU.

Full official 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.

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Applies to 1 model in our index