AD 2009-23-07
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Saab | AB | Airworthiness Directives; Saab AB, Saab Aerosystems Model SAAB 340A (SAAB/SF340A) and SAAB 340B Airplanes |
| aircraft | Aviat | Various | Airworthiness Directives; Saab AB, Saab Aerosystems Model SAAB 340A (SAAB/SF340A) and SAAB 340B Airplanes |
Unsafe Condition
Severe failure can occur to any of the four hydraulic accumulators installed in the hydraulic compartment, where either one of the two end parts on the accumulator may depart from the pressure vessel due to corrosion.
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Required Actions
Replace the affected hydraulic accumulators with part number (P/N) 08 8423 001 1 and P/N 08 8423 030 1 with a modified hydraulic accumulator as specified in Saab Service Bulletin 340-29-023 or 340-29-024.
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Compliance Time
Within 12 months of the effective date (December 14, 2009).
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Affected Aircraft
Saab AB, Saab Aerosystems Model SAAB 340A (SAAB/SF340A) and SAAB 340B airplanes, all serial numbers, certificated in any category, with hydraulic accumulators having part number (P/N) 08 8423 001 1 or P/N 08 8423 030 1 installed, except accumulators with serial numbers listed in paragraph 3.B. of Saab Service Bulletin 340-29-023, Revision 01, dated April 3, 2009.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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