12-24-2025, 12:06 PM
I'm a relatively new A&P mechanic working at a regional airline, and I'm currently dealing with a recurring write-up on one of our turboprops where we're getting multiple false warnings for a landing gear sensor fault during pre-flight checks, but the system tests fine on the ground and the gear operates normally. We've already replaced the suspect proximity sensor and checked the wiring harness for chafing, but the intermittent fault keeps returning, which is causing operational delays and frustrating the flight crews. For more experienced avionics or airframe technicians, what's your systematic approach to troubleshooting these kinds of ghost faults in aircraft maintenance? Should I be looking more closely at the landing gear control unit itself for a software glitch, investigating power supply fluctuations to the sensor circuit, or considering something like vibration-induced intermittent connections that only manifest in flight?