AD 2023-16-06
Unsafe Condition
An auxiliary motor and pump failing to feather a propeller in flight due to de-bonded motor magnets caused by corrosion at the magnet and housing interface.
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Required Actions
Remove from service an auxiliary motor and pump having part number 782655-3 (Aerocontrolex P/N 4122-006009) and replace with an auxiliary motor and pump having P/N 782655-4 (Aerocontrolex P/N 4122-056000). Perform a post-installation system test after replacement.
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Compliance Time
Within 90 days after the effective date of this AD (October 20, 2023).
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Affected Aircraft
Hamilton Sundstrand Corporation Model 14SF-17 and 14SF-19 propellers, known to be installed on Viking Air Limited Model CL-215-6B11 (CL-215T and CL-415 Variants) airplanes.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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