AD 2017-09-11
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Bombardier | Various | Airworthiness Directives; Bombardier, Inc. Airplanes |
Unsafe Condition
Deformation of the airstair door handrail holder bracket or failure of the pin retainer bracket can interfere with the operation of the airstair door, preventing it from opening.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Perform a general visual inspection of the forward and aft handle holder brackets for damage, and a detailed visual inspection of the forward and aft pin retainer brackets for lanyard and pin conditions. Check for unobstructed movement of the pin retainer brackets and rework the airstair door handrail to prevent bulkhead damage and door jamming.
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Compliance Time
Within 600 flight hours after the effective date of this AD.
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Affected Aircraft
Bombardier, Inc. Model DHC-8-400, -401, and -402 airplanes, serial numbers 4001 through 4473 inclusive, equipped with Bombardier ModSum 4-422100 or ModSum 4-458687 (Jetway Compatible Passenger Airstair Door).
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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