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:
- Multiple aircraft types experienced various ignition switch malfunctions, indicating a widespread issue.
- Reported failures included switches sticking or being difficult to turn, unintentional starter engagement, internal burning, and intermittent grounding.
- These malfunctions led to problems such as an inability to perform magneto checks, starting difficulties, engine roughness, or smoke in the cockpit.
- Ignition switch failures occurred across a wide range of operational times, from nearly new components (32 hours) to those with extensive service (2800 hours).
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