Cessna 182T Skylane
Broken Ignition Switch
Ignition switch (p/n C2925010106) could be rotated counter-clockwise past the “off” position and engage the starter.
Accident Probes
Critical Moments
Features
Learning Experiences
Proficiency
Reality Check
Squawk Box
Systems Check
Training and Proficiency
Ignition Switch Issues
The student pilot was doing an engine run prior to flight. Was unable on the first try to complete the magneto check as the key would not turn from the both position to the left/right/off position. After shutdown, the student was able to select off on the switch. The switch that was installed (p/n 103572101) included a push-to-start function. Found the switch sticking internally and replaced it with a new push-to-start switch.
Key Takeaways:
- Ignition switches across various aircraft types experience diverse failures, including mechanical issues like sticking, inability to turn, or rotation past the "off" position, sometimes engaging the starter.
- Electrical malfunctions are also common, manifesting as intermittent internal grounding, requiring excessive force to operate, or complete failure with signs of burning electronics and smoke.
- Several incidents specifically highlight issues with "push-to-start" ignition switches, notably part number 103572101, which frequently exhibit internal sticking or electrical unreliability at various operating times.
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