AD 2010-09-07
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Bombardier | Various | Airworthiness Directives; Bombardier, Inc. Model DHC-8-400 Series Airplanes |
| aircraft | Aviat | Various | Airworthiness Directives; Bombardier, Inc. Model DHC-8-400 Series Airplanes |
Unsafe Condition
A potential freezing of the AOA Vane Resolver may restrict the dynamic behavior (lag) of the vane and could lead to a potential seize-up condition at lower temperatures. Additionally, the AOA vane heating element could degrade due to ageing, leading to insufficient heat to prevent ice build-up on the AOA vanes, which may change the aerodynamic properties of the AOA vane and send inaccurate information to the Stall Protection System (SPS).
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Replace the vanes equipped with suspect resolvers and perform a periodic inspection of the in-rush current to verify the AOA vane heating capability.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Before further flight
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Bombardier, Inc. Model DHC-8-400 Series Airplanes equipped with AOA vanes, P/N C16177AC.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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