AD 98-13-36
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Saab AB, Saab Aerosystems | SAAB 2000 | Airworthiness Directives; Saab Model SAAB SF340A, SAAB 340B, and SAAB 2000 Series Airplanes |
| aircraft | Saab AB, Saab Aerosystems | SAAB 340B | Airworthiness Directives; Saab Model SAAB SF340A, SAAB 340B, and SAAB 2000 Series Airplanes |
| aircraft | Saab AB, Saab Aerosystems | 340A (SAAB SF340A) | Airworthiness Directives; Saab Model SAAB SF340A, SAAB 340B, and SAAB 2000 Series Airplanes |
Unsafe Condition
Uncommanded movement of the right-hand elevator trim-tab to a maximum deflection position due to failure in the aircraft harness and a fault in the pitch trim synchronizer, which could lead to structural overload of the horizontal stabilizers at speeds above 180 knots and consequent reduced controllability.
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Required Actions
Repetitive operational tests of the pitch trim system of the elevator trim-tab to ensure correct operation, and repair if necessary. Repairs may be accomplished in accordance with the Saab 340 Aircraft Maintenance Manual (AMM) 27-32-30 or a method approved by the FAA or Luftfartsverket (LFV).
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Compliance Time
Effective July 30, 1998.
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Affected Aircraft
Saab Model SAAB SF340A (serial numbers -004 through -159), SAAB 340B (serial numbers -160 and subsequent), and SAAB 2000 (serial numbers -005 and -007 through -009, inclusive) equipped with a mechanical elevator control system (MECS).
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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