Update on that intermittent autopilot fault on the King Air C90s

After chasing a random pitch trim runaway for a week, I finally found the issue was a corroded pin in the D-sub connector at station 43, which I fixed by cleaning it with a fiberglass pen and applying a dab of Stabilant 22A.

2 comments

2 Comments

the_tara11d ago

You sure that's the right fix for a trim runaway?

sethmartinez11d ago

Honestly, it's a solid start but maybe not the whole story. That fix might stop the immediate runaway but could miss the root electrical fault. You really need to check the whole control circuit to prevent it from happening again.