Circuit Breakers

Pitot heat switch would not stay in the on position. On troubleshooting, the technician found circuit breaker/switch (p/n 35-38013263) to be at fault. AD 2008-13-17 had been completed 2427 flight hours prior. Recommend breaker manufacturer develop a more durable product or aircraft maker look for a different source for its circuit breakers.

Editorial Staff

Monday, October 24, 2016 at 12:00 AM ET

Verified

Key Takeaways:

Multiple aircraft experienced various circuit breaker malfunctions, including premature tripping, failure to trip, or inability to remain in the "on" position, sometimes leading to power loss.
Electrical issues were initiated or exacerbated by external factors like pest infestation causing shorts, or mechanical problems such as loose connections and cracked circuit breaker housings.
The incidents underscore the critical need for durable circuit breaker components, robust wiring integrity, and comprehensive maintenance to prevent diverse electrical system failures.