Stall warning with Master on

[Jetman]

When I turned on the master, the stall warning is coming on over the speaker. Anyone ever have this 

issue?  Thanks!

 

[Shadrach]

I’m confused by your question. How else is the stall horn supposed to sound besides through the speaker? Are you saying that your stall horn is sounding with the master on regardless of the position of the vane?

[Marauder]

When I turned on the master, the stall warning is coming on over the speaker. Anyone ever have this 
issue?  Thanks!
 

Has the plane sat in the rain before this happened? If so, check the Cannon connector on the pilot side. It is in the cavity near the wing root (almost directly below the vent window). If your window seal is leaking, it will let water in and soak that connector.


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[Marauder]

This is one half of what a Cannon connector looks like. It should be made of black plastic.




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[Guest]

1 hour ago, Jetman said:

When I turned on the master, the stall warning is coming on over the speaker. Anyone ever have this 

issue?  Thanks!

 

The stall warning is normally turned on when the circuit is grounded by the stall vane on the wing.  A stuck stall vane or a short to ground can cause un commanded horn sounding.

[kortopates]

Somebody likely leaned against it and the vane gets stuck in the up position, sometimes it even gets bent. Check there first.


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[buddy]

This happened to me once after washing the airplane, try jiggling the stall warning tab on the leading edge. I found my tab gets stuck when it’s pushed up to one side.

[Jetman]

Thank you, I will check the cannon plug and vane.

 

[A64Pilot]

Try disconnecting the cannon plug, if the alarm stops it’s in the switch, if it doesn’t then somethings grounded in the wiring.

I think I’d first start with spraying the switch with good contact cleaner, with the straw of course, then move on to harder things.

‘Don’t know about Mooney’s but some of those switches can be stupid expensive, so take care

[PT20J]

Here's what it looks like.

[Guest]

23 minutes ago, PT20J said:

Here's what it looks like.

That’s the Mooney replacement for the very expensive Safe Flight switch.

[MikeOH]

30 minutes ago, M20Doc said:

That’s the Mooney replacement for the very expensive Safe Flight switch.

Ah, so it's only expensive

[Guest]

1 hour ago, MikeOH said:

Ah, so it's only expensive

Yes, not  outrageous like a Safe Flight. $570.00 from Mooney

[carusoam]

Wait a sec…

That isn’t expensive…

Until it gets heated….  Find the Fiki version….

There are pics and pricing around here somewhere…

The Fiki version has a problem keeping its vane heater in one piece…

Best regards,

-a-

[A64Pilot]

Yeah I’ve heard the heated one for a twin Cessna get’s really crazy expensive.

I’ve never bought one so I don’t know