Kap 140 shutting off when cold

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skywardcon
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Kap 140 shutting off when cold

Post by skywardcon »

For the last couple of flights, my Kap 140 autopilot has shut off during climb out. Both times I turned it back on and it shut down again. Usually on the 4th time it finally stays on and works correctly. Any ideas?

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Colin
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Re: Kap 140 shutting off when cold

Post by Colin »

I am liking your KAP140 installation less and less with every reported flight.
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Re: Kap 140 shutting off when cold

Post by jb642DA »

How cold is "cold"? Our DA42 (it has a KAP140 also) flew a lot in this Michigan winter and it was COLD - a couple of times the outside temp at startup and throughout the flight was 5 deg F or less. Fourtunately, it started out in a "heated" (30-35 deg) hangar but was exposed to the cold outside WX for a few hours each time.
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skywardcon
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Re: Kap 140 shutting off when cold

Post by skywardcon »

It was not very cold. I'd say 40 degrees F.
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Lance Murray
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Re: Kap 140 shutting off when cold

Post by Lance Murray »

You can make up a cable and pull the fault codes with your laptop. Your avionics shop should already have a cable to do it. Very easy. The instructions are in the install manual that you should be able to google and download.

Mine had a bad AP disconnect switch. Turns out all the power goes through those switches and they can fail intermittently.
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Re: Kap 140 shutting off when cold

Post by Diamond_Dan »

I have routinely flown with the KAP 140 below 20°F this winter and last with no problems (knock knock). I think your problem lies elsewhere.
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Re: Kap 140 shutting off when cold

Post by skywardcon »

Lance Murray wrote:You can make up a cable and pull the fault codes with your laptop. Your avionics shop should already have a cable to do it. Very easy. The instructions are in the install manual that you should be able to google and download.

Mine had a bad AP disconnect switch. Turns out all the power goes through those switches and they can fail intermittently.
Good advice. I'll forward this info to my shop. AP disconnect switch makes sense.

Thanks!
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