AD 98-11-26
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Saab AB, Saab Aerosystems | SAAB 2000 | Airworthiness Directives; Saab Model SAAB 340B and SAAB 2000 Series Airplanes |
| aircraft | Saab AB, Saab Aerosystems | SAAB 340B | Airworthiness Directives; Saab Model SAAB 340B and SAAB 2000 Series Airplanes |
Unsafe Condition
Failure of the check valves could result in loss of airfoil de-icing capability during single engine operation, and consequent reduced controllability of the airplane.
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Required Actions
Modify the left- and right-hand check valves of the airfoil de-icing system, or replace the check valves with improved valves, in accordance with Saab Service Bulletin 340-30-080 (for Model SAAB 340B) or 2000-30-012 (for Model SAAB 2000).
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Compliance Time
Within 5 months after the effective date of this AD
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Affected Aircraft
Model SAAB 340B series airplanes, serial numbers 240 through 430 inclusive; Model SAAB 2000 series airplanes, serial numbers 002 through 050 inclusive, and 052.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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