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Tried putting dielectric grease on a King Air pitot connector in Wichita, got a weird reading I wasn't expecting
Two days after the grease went on, the air data computer flagged a intermittent fault that vanished every time I pulled the connector, and it turns out I had overfilled it enough to bridge two pins that only touched at altitude, so has anyone else run into grease causing a fake fault instead of fixing one?
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stella3071mo ago
The thermal thing is what gets you, at altitude the connector contracts and sits at like minus 40, so the grease stiffens up and could actually push pins apart instead of bridging them depending on how much you loaded in there. I'd pull that connector and look for grease that's changed color or gone waxy at the pins, that tells you if it was cooking or freezing. Honestly the stuff is meant for a thin film, not a pack, and AMMs never spell that part out.
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