Gear Buzzer and warning light

[tomloft]

1976 Mooney M20C gear buzzer and warning light comes on while the flaps are down and the gear is coming up, the light stays on and then lower and raise the gear the light goes out.  Is this a problem or is it normal? 

[Marauder]

1976 Mooney M20C gear buzzer and warning light comes on while the flaps are down and the gear is coming up, the light stays on and then lower and raise the gear the light goes out.  Is this a problem or is it normal? 

Are you saying it doesn't do this when the flaps are up?

The buzzer on your gear warning will come on when you pull the throttle below a preset MP and the gear is up. Around 12" in my plane (75F). If you have your MP set above this limit, it won't sound. Flap position should have nothing to do with the gear position.

What I don't know if the sound you are hearing is something else.




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[Bryan]

My 1967 M20F, the light stays on (red) while the gear was up... no matter the flap position.  My manifold pressure (throttle) cable had a switch right behind the mount that sounded the buzzer if the gear was up and the MP was down to a specific point (near idle).

[Hank]

The red "Gear Unsafe" light should be on all the time that the gear is not fully down and locked; when it is, the green "Gear Safe" light should come on.

My gear buzzer doesn't sound when raising the gear, as I'm always above the MP limit. My C should be set at 12"; any MP above 12" and the gear buzzer will not sound. However, sometimes on takeoff on a gusty day, the stall horn will chirp on initial climb, around tree top level or just above.

Which horn are you hearing???

[Marauder]

The red "Gear Unsafe" light should be on all the time that the gear is not fully down and locked; when it is, the green "Gear Safe" light should come on.
My gear buzzer doesn't sound when raising the gear, as I'm always above the MP limit. My C should be set at 12"; any MP above 12" and the gear buzzer will not sound. However, sometimes on takeoff on a gusty day, the stall horn will chirp on initial climb, around tree top level or just above.
Which horn are you hearing???

He has a 76 C. I think unless they reverted back to your system design, it should operate more like mine. I don't have any lights on when the gear is up.

I do get a "Gear Unsafe" warning while in transient. I may also get a sound if the gear isn't moving and the unsafe light is on (like when the donuts don't expand on a cold day and activating the squat switch).




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[carusoam]

The POH has the wiring diagram that includes the gear horn and the stall horn.  A quick review of the wiring diagrams will tell the situations required to sound the horns.

Gear up and MP low sets off the gear horn. The switch sits in the throttle control divot. Adjustable by distance, not really by MP.

In newer Mooneys, flaps full down with the gear up is a combination worth tooting a horn....

PP thoughts only, not a mechanic...

Best regards,

-a-

Edited April 12, 2017 by carusoam