Bendix King Autopilot Disconnect Button

[Greg_D]

Would anyone have a source for the subject button?

[IvanP]

I believe this is the switch you are looking for: NKK switch part No. MB2061SS1W01-CC

You can just use the cap to replace yours. The cap is a screw on as you probably found out the hard way. Not sure if one can get the button only, but the entire switch is $12 from TTI so it may be worth it even if you do not use the switch.

https://www.tti.com/content/ttiinc/en/apps/part-detail.html?partsNumber=MB2061SS1W01-CC&mfgShortname=NKK&utm=ga-shop1&utm_term=nkkmb2061ss1w01-cc&gad_source=1&gad_campaignid=1147404620&gbraid=0AAAAADvyBAbKzFqGooAmvtqZHrFicDT9_&gclid=EAIaIQobChMIx5n37ODKjwMVBSlECB0jrjtwEAQYASABEgKI0_D_BwE 

 

[Yetti]

I think Spruce had the caps only.   Digikey would also have just the button/cap

[Beard]

Many years ago I lost the red button too. I ended up buying a new switch just for the button. I did not get a cheap switch, but a more expensive one.

[Mark89114]

Don’t call bendix king for it…..suspect they want $500 for it

[0TreeLemur]

Mouser part number MB2061SS1W01-BC
If you have trouble finding it in stock elsewhere.

[PT20J]

Those switches have a fairly high failure rate - if it were me, I’d replace the whole switch. 

[0TreeLemur]

1 minute ago, PT20J said:

Those switches have a fairly high failure rate

When I was troubleshooting the A/P in our J, I replaced that switch to negative effect.  When I was studying it I read that the high failure rate is caused by the fact that under trim servo load, the switch is operating near its rated current.   A good way to extend the life of that switch is to never use it (except in case of emergency).   If you never use it, it never disconnects under load, and doesn't damage the contacts.  Not my informed opinion, just something I read that kind of makes sense.   It is a minor pain to replace but not a major pain like it seems replacing the trim switch would be.

[IvanP]

29 minutes ago, PT20J said:

Those switches have a fairly high failure rate - if it were me, I’d replace the whole switch. 

Yes, indeed. I had to replace it recently (that is why I had the reference handy). It is not that difficult to do.