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Hot take: the gremlin in Bay 3 was a single loose cannon plug for 4 hours
Had a day where a flap asymmetry fault kept popping up on a 737 in for a C check, and I chased it for 4 hours through the FCC, the skew sensor, and two wiring runs. Turns out a cannon plug behind the aft galley wall was only finger tight, and the vibration on the taxi test is what lit it up every time. My lead walked over, wiggled it, and said 'that one bites everybody once.' I felt about two feet tall standing there with my meter still hooked up. Wasted a whole shift on a connector that took 30 seconds to snug down, and the plane still made its evening bank out of Phoenix. Anybody else got a ghost fault story that turned out to be something dumb like a loose plug?
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webb.jordan5d ago
Back in my hangar days we spent a whole morning swapping a fuel quantity gauge on a King Air, and it was a 10 cent crimp on the ground wire behind the panel. Old timer told me the same thing, that every gremlin has a home and it's usually a plug or a ground.
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