Source for a M20E electric flap motor?

[AndreiC]

Hello all,

my flaps have been intermittent lately (1970 M20E, electric flaps and gear) and I have not been able to find anyone to either overhaul my electric motor or to sell me a replacement one. The motor I am talking about is *not* the same one found on the J-models; that one has limit switches -- mine does not, it keeps spinning for as long as you keep the button pressed.

The trouble I have with my motor is that it will sometimes get stuck somewhere halfway, and refuse to go either up or down for a few minutes. Not yet a problem, but will be if things get worse. I talked to Aircraft Accessories of Oklahoma, and they said these motors have no overhaul manual, they were meant to be throwaway. So even though it might be easy to replace the brushes they cannot do it without a manual. 

The part number (from what I can tell) is 750094-003. I have not been able to find a good used one.

Any suggestions?

Thanks, Andrei.

[M20E78merlin]

On 7/13/2023 at 1:35 PM, AndreiC said:

Hello all,

my flaps have been intermittent lately (1970 M20E, electric flaps and gear) and I have not been able to find anyone to either overhaul my electric motor or to sell me a replacement one. The motor I am talking about is *not* the same one found on the J-models; that one has limit switches -- mine does not, it keeps spinning for as long as you keep the button pressed.

The trouble I have with my motor is that it will sometimes get stuck somewhere halfway, and refuse to go either up or down for a few minutes. Not yet a problem, but will be if things get worse. I talked to Aircraft Accessories of Oklahoma, and they said these motors have no overhaul manual, they were meant to be throwaway. So even though it might be easy to replace the brushes they cannot do it without a manual. 

The part number (from what I can tell) is 750094-003. I have not been able to find a good used one.

Any suggestions?

Thanks, Andrei.

I am having a similar issue.  Did you find a solution?  If so, could you share?

Thanks!

[AndreiC]

10 hours ago, M20E78merlin said:

I am having a similar issue.  Did you find a solution?  If so, could you share?

Thanks!

Yes, I did. It was not the motor, which seems to be indestructible, but the switch. That very same switch was impossible to buy from anywhere, but a very similar one (same specs, just different shape lever) was readily available and my A&P had no trouble replacing it. Let me know if you end up thinking that the switch is the problem, and I can find you the exact part number that I installed.

[M20E78merlin]

1 hour ago, AndreiC said:

Yes, I did. It was not the motor, which seems to be indestructible, but the switch. That very same switch was impossible to buy from anywhere, but a very similar one (same specs, just different shape lever) was readily available and my A&P had no trouble replacing it. Let me know if you end up thinking that the switch is the problem, and I can find you the exact part number that I installed.

My A&P is pretty sure it is the motor, unfortunately.  I will put this in his ear, though.  Thanks!

[varlajo]

2 hours ago, AndreiC said:

Yes, I did. It was not the motor, which seems to be indestructible, but the switch. That very same switch was impossible to buy from anywhere, but a very similar one (same specs, just different shape lever) was readily available and my A&P had no trouble replacing it. Let me know if you end up thinking that the switch is the problem, and I can find you the exact part number that I installed.

Do you happen to have the p/n for the replacement switch? Thank you!

[AndreiC]

1 hour ago, M20E78merlin said:

My A&P is pretty sure it is the motor, unfortunately.  I will put this in his ear, though.  Thanks!

I also was pretty confident that it was the motor, but luckily it was not. Trying to replace the switch is much easier. If the motor runs well in one direction and gets stuck in the other, it almost certainly is not the motor.

Also, you should check which kind of motor/gear box you have. Mine does not have limit switches so if you keep the button "up" or "down" it will continue running past its stop and just make a clicking noise (when all works well). If you have the one with limit switches many people recommended cleaning those up with a spray of contact cleaner. (Mine was not of that type.)

[AndreiC]

5 minutes ago, varlajo said:

Do you happen to have the p/n for the replacement switch? Thank you!

It was this part 

https://www.mouser.com/ProductDetail/785-12TS15-7