AD 99-04-17
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Saab AB, Saab Aerosystems | SAAB 340B | Airworthiness Directives; Saab Model SAAB SF340A and SAAB 340B Series Airplanes |
| aircraft | Saab AB, Saab Aerosystems | 340A (SAAB SF340A) | Airworthiness Directives; Saab Model SAAB SF340A and SAAB 340B Series Airplanes |
Unsafe Condition
Fatigue cracking of the support straps of the flaps could result in further damage to the flap structure and reduced controllability of the airplane.
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Required Actions
Inspect support straps of flaps and adjacent areas for discrepancies, perform corrective actions if necessary, and replace the support straps with new steel straps. Actions must be accomplished in accordance with Saab Service Bulletin 340-57-033, Revision 01, 02, or the original issue.
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Compliance Time
Prior to the accumulation of 6,000 flight cycles after the last scheduled detailed visual inspection of the flaps accomplished prior to the effective date of this AD, or within 3,000 flight cycles, whichever occurs later. The inspection specified in paragraph (b) is not required until the airplane has accumulated 16,000 total flight cycles.
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Affected Aircraft
Saab AB, Saab Aerosystems Model SAAB 340B and SAAB SF340A (340A) airplanes.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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