AD 94-09-09
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Saab AB, Saab Aerosystems | SAAB 340B | Airworthiness Directives; SAAB Aircraft Model SAAB SF340A and SAAB 340B Airplanes |
| aircraft | Saab AB, Saab Aerosystems | 340A (SAAB SF340A) | Airworthiness Directives; SAAB Aircraft Model SAAB SF340A and SAAB 340B Airplanes |
Unsafe Condition
Moving the power levers below 'flight idle' (beta mode) when airborne can cause the propeller to enter a low pitch angle, leading to uncontrollable propeller speed increase and potential engine overspeed and loss of engine power.
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Required Actions
Install a placard in the cockpit to prohibit moving power levers below 'flight idle' (beta mode) when airborne, following Saab Service Bulletin 340-76-033. Compliance with alternative methods may be approved by the FAA Manager.
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Compliance Time
Within 10 days after the effective date of this AD
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Affected Aircraft
Model SAAB SF340A airplanes with serial numbers 004 through 159; SAAB 340B airplanes with serial numbers 160 through 379, certificated in any category.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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