The navigation light circuit breaker switch trips and will not reset. Fault in circuit breaker switch (p/n 35-380132-101). These switches are the new and improved versions installed under AD 2008-13-17, but are continuing to fail internally.
Aircraft across multiple models are experiencing common failures of various electrical switches, including those for navigation lights, landing lights, landing gear, and flaps.
These switch failures frequently involve overheating, burning, internal shorts, and sometimes lead to smoke in the cockpit.
Several incidents highlight issues with "new and improved" or AD-mandated switches, indicating persistent reliability concerns despite corrective actions.
Operational practices not aligned with design intent (e.g., continuous light use) and maintenance issues (e.g., misadjustment) can also contribute to switch malfunctions.
Beechcraft Model F33A Bonanza Nav Light Switch Internal Short
The navigation light circuit breaker switch trips and will not reset. Fault in circuit breaker switch (p/n 35-380132-101). These switches are the new and improved versions installed under AD 2008-13-17, but are continuing to fail internally.
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