AircraftDirectives
Airworthiness Directive

AD 2012-06-04 77 FR 16428

Federal Aviation Administration · 14 CFR part 39

FR document
2012-6531
Amendment
39-16985
Published
2012-03-21
Models covered
1
Last live check
2026-08-17

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AD

2012-06-04

FR doc 2012-6531 · 77 FR 16428

AD 2012-06-04Published 2012-03-21Effective 2012-04-25

Requires inspecting the structure and gearbox drain paths for blockages by sealant, and removing any blockages.

Full official 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.

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Applies to 1 model in our index