AD 2008-17-06
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Bombardier | DHC-8-400 | Airworthiness Directives; Bombardier Model DHC-8-400 Series Airplanes |
Unsafe Condition
Loss of No. 2 hydraulic system fluid causing the power transfer unit (PTU) to overspeed and increasing fluid flow in the No. 1 hydraulic system, potentially leading to loss of both hydraulic systems and essential functions for safe flight and landing.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Revise the Normal and Abnormal Procedures section of the AFM to include procedures ensuring the 'PTU CNTRL' switch is Normal, the 'PTU CNTRL ON' advisory light is out, and the 'HYD PWR XFER' circuit breaker is pulled in the event of the '2 HYD ISO VALVE' caution light illumination.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Before further flight
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Affected Aircraft
Bombardier Model DHC-8-400, DHC-8-401, and DHC-8-402 series airplanes.
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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