AD 2004-09-39
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Saab | SAAB 340B | Airworthiness Directives; Saab Model SAAB 340B Series Airplanes Equipped with Hamilton Sundstrand Propellers |
Unsafe Condition
Incorrectly installed 35-ampere (amp) remote controlled circuit breakers (RCCBs) on a 50-amp electrical circuit may result in erroneous tripping, premature failure of the RCCBs, loss of power to the feather pump system, and reduced controllability of the airplane.
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Required Actions
Inspect two remote controlled circuit breakers (RCCBs) in specific electrical compartments to identify their part numbers. Replace the RCCBs with new ones having a different part number if necessary to ensure compliance with the 50-amp circuit requirements.
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Compliance Time
Before further flight
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Affected Aircraft
Saab Model SAAB 340B series airplanes equipped with Hamilton Sundstrand propellers.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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