Brittain servo boot

[Mooneydreamr]

I may have what you need if you are still looking. Send me a picture of what you need.

 

Kevin B.

[Chris Strube]

Thanks Kevin,

I found one at BAS Parts.  Ended up paying $150 plus shipping.  It's good to know that there are still a few around.

 

regards,

[cruiserflyer]

On 11/30/2025 at 9:43 PM, McMooney said:

mine works great when the boots are healthy.  I wonder why more companies didn't adopt those vac servos,  whole system can be maintained for a few hundred bucks instead of thousands per servo

Do you have the altitude hold elevator servo?

[McMooney]

6 hours ago, cruiserflyer said:

Do you have the altitude hold elevator servo?

what's the part number,  my system was just removed and i have a couple other parts laying about

[cruiserflyer]

16 minutes ago, McMooney said:

what's the part number,  my system was just removed and i have a couple other parts laying about

On the servo it's written "MOD BI 706" and "P/N 20413-1-0" and if you also have any of the altitude hold and pitch reference modules I might be looking for those too. Thank you!

 

Paul L

[takair]

Interesting, my elevator servos are 20413-6-0…

[McMooney]

1 hour ago, takair said:

Interesting, my elevator servos are 20413-6-0…

this is the one i have.

[cruiserflyer]

On 1/9/2026 at 11:35 PM, McMooney said:

this is the one i have.

Here is mine. The blue hose, according to the Brittain B5 manual is for the elevator servo, specifically the nose up.

[takair]

Hmm. -1-0. Just adds to the mystery. I was in touch with Kevin to try to figure out the magic number or at least decipher the part number. Unfortunately, looks like the decoder ring is gone. May try to take some measurements to sort it out. 

[cruiserflyer]

On 1/11/2026 at 12:27 PM, takair said:

Hmm. -1-0. Just adds to the mystery. I was in touch with Kevin to try to figure out the magic number or at least decipher the part number. Unfortunately, looks like the decoder ring is gone. May try to take some measurements to sort it out. 

Thank you for any help you can provide.