AD 2006-26-08
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Raytheon | Aircraft Company Model 390 | Airworthiness Directives; Raytheon Aircraft Company Model 390 Airplanes |
Unsafe Condition
Failure of the hydraulic pump outlet tube, which could cause flammable fluid leakage in the engine nacelle, leading to a fire. There is also a risk of loss of hydraulic system functions including normal gear extensions, speed brakes, roll spoilers, lift dump, and normal brakes.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Visually inspect the hydraulic pump outlet tube on both engines on a recurring basis. Replace the hydraulic pump outlet tube clamp on the left-hand engine at each inspection. Immediately replace the hydraulic pump outlet tube if damage is found. Incorporate a revision to the Airplane Flight Manual (AFM) to not allow operation of an engine with its firewall hydraulic shutoff valve closed. Replace the hydraulic pump outlet tube if an engine is operated with the firewall hydraulic shutoff valve closed.
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Compliance Time
Within 50 flight hours after the effective date of this AD.
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Affected Aircraft
Raytheon Aircraft Company Model 390 airplanes, all serial numbers.
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Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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