AD 2006-25-17
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Bombardier | DHC-8-400 | Airworthiness Directives; Bombardier Model DHC-8-400 Series Airplanes |
Unsafe Condition
Reports of incidents of airspeed mismatch between the pilot, co-pilot, and standby airspeed indications caused by contamination in the pitot static system.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Clean the drain holes of all the pitot static probes within 30 days after the effective date, and repeat every 70 flight hours. Inspect the drain holes for blockages after cleaning before further flight.
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Compliance Time
Within 30 days after the effective date, with repetitive actions every 70 flight hours.
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Affected Aircraft
Bombardier Model DHC-8-400, DHC-8-401, and DHC-8-402 airplanes, certificated in any category; serial numbers 4001 and 4003 and subsequent.
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Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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