M20K Gear Overide Switch P/N : SB1DDX492-2

[Australian M20K Owner]

I've been trying to acquire one of these for weeks with no success. Vh-MZG is now on the ground as the engineer has refused the sign the existing non-functioning, burnt-out switch. Does anyone know where I can get one? I'll have a substitute installed with an "engineering order" if anyone knows of a good substitute.

[GeeBee]

Had the same problem with my Ovation. Frank Crawford advised me to install the new style switch that was used on the latest Mooney's. It fits in the hole. It does require a resistor in the circuit to drop down the voltage other wise the led bulb will burn out.

Here is the source for the switch:

https://www.mouser.com/ProductDetail/E-Switch/RP8100B2M1CEBLKREDRED?qs=QtyuwXswaQh5M04TKsQThg%3D%3D

 

Here is the resistor:

https://www.mouser.com/ProductDetail/KOA-Speer/MOS1CT528R132J?qs=sGAEpiMZZMtlubZbdhIBIAkLiGKeVnd8QhClgcYo4E0%3D

 

Here is my thread on the subject from 5 years ago. 

 

[CCAS]

11 hours ago, Australian M20K Owner said:

Does anyone know where I can get one?

If you want to stick with the OEM switch I may be able to help.  I recently upgraded my J model gear safety bypass button/switch with the type referenced by @GeeBee above so I should have my old switch somewhere in my several boxes of legacy equipment that came out of the airplane.  Let me know. 

[Fly Boomer]

9 hours ago, GeeBee said:

Frank Crawford advised me to install the new style switch that was used on the latest Mooney's. It fits in the hole

So, on the latest models (and now yours), the red override button bulges out from the panel?

[GeeBee]

3 hours ago, Fly Boomer said:

So, on the latest models (and now yours), the red override button bulges out from the panel?

Not any more than the original.

[PT20J]

2 minutes ago, GeeBee said:

Not any more than the original.

The data sheet for the new switch shows it protrudes .323" from the panel. The original on my M20J is flush.

[GeeBee]

I have had bumps on the head protrude more. Don't ask how I got them.

[CCAS]

40 minutes ago, PT20J said:

the data sheet for the new switch shows it protrudes .323" from the panel.

That's about right. I installed the new-style switch for both the gear safety bypass and TOGA.  They're different part numbers but both sit 'proud' on the panel. 

[PT20J]

56 minutes ago, GeeBee said:

I have had bumps on the head protrude more. Don't ask how I got them.

I get mine from the prop when working under the engine.

[Aerodon]

23 hours ago, Australian M20K Owner said:

I've been trying to acquire one of these for weeks with no success. Vh-MZG is now on the ground as the engineer has refused the sign the existing non-functioning, burnt-out switch. Does anyone know where I can get one? I'll have a substitute installed with an "engineering order" if anyone knows of a good substitute.

I have several, including one with the wiring harness still attached for a quick replacement.

 

Aerodon

 

[Australian M20K Owner]

GeeBee,

For the Mouser Switch and Resistor modification, is there an SB or approved Mooney modification?

[Fly Boomer]

33 minutes ago, Australian M20K Owner said:

GeeBee,

For the Mouser Switch and Resistor modification, is there an SB or approved Mooney modification?

As @GeeBee said above, That button was used on other (later) models by the factory.  If Mooney affixed it to an airplane, that makes it official.

[Aerodon]

On 7/10/2025 at 10:15 PM, Australian M20K Owner said:

I've been trying to acquire one of these for weeks with no success. Vh-MZG is now on the ground as the engineer has refused the sign the existing non-functioning, burnt-out switch. Does anyone know where I can get one? I'll have a substitute installed with an "engineering order" if anyone knows of a good substitute.

Here, I have one for you, wired up and ready to install.

 

Aerodon    supercub180@gmail.com

 

 

[GeeBee]

15 hours ago, Australian M20K Owner said:

GeeBee,

For the Mouser Switch and Resistor modification, is there an SB or approved Mooney modification?

Only that it is in the schematics for later models.