Lift detector issue

[MooneyDK]

Hi Mooniacs,

We have a problem with our 2005 Mooney Ovation 2GX - suddendly doing flare the engine instrument switch pop out - we thought it was the tachometer, but when disconnected the problem was still present.

After some research, we figured out that it's the lift detector (stall switch) that cause the problem. When we have power on, and flick the switch shortly, then the fuse "engine instruments" pop out. Some times you can activate the lift detector 2 seconds and hear the stall warning on for quite som time, other times the fuse instantly pop just the moment you flick the lift detector.

The lift detector works (it activate the stall warning), but it pop the engine instrument fuse. 

Other Mooniacs ever had same issue? And have idea's for possible solutions other than buy a new expensive part without knowing for sure that's the issue.

Best Regards from Denmark.

[N201MKTurbo]

Check the sonoalert in the overhead. One of its terminals is probably shorting to the skin.

[Yetti]

VOM to check the stall switch since it out.  Check each terminal to ground.   Then as Turbo said.  since it it out, you could test the circuit from the wing wiring for shorts.

[carusoam]

Do you have access to the maintence manuals?

The wiring diagrams are extensive...

The MM may be available through Mooney.  Some good news has been there in the past...

Best regards,

-a-