E-T-A Switches

[0TreeLemur]

Recently I bought to used 10A E-T-A CB/switches for my J at a good used price.  I just tested them both by putting them one at at time in series with a 15A fuse and an incandescent landing light, then shorted the power lead going to the landing light after the fuse.  One breaker did not trip before the fuse blew, so it is probably bad- I'm not eager to trust it.   The other one tripped, but won't reset (!).  I figure it's bad too.

Now the question becomes: I've got two switches in my J with broken covers (boost pump & strobes).   How does one replace covers on E-T-A switches without breaking anything?

Thx.

Fred

[PT20J]

Did you use a slo blo fuse? Breakers may take longer to trip than a fast blow fuse. A better test 

The covers snap on and off. I believe @AH-1 Cobra Pilot can sell you replacements and answer installation questions. 

[0TreeLemur]

1 hour ago, PT20J said:

Did you use a slo blo fuse? Breakers may take longer to trip than a fast blow fuse. A better test 

The covers snap on and off. I believe @AH-1 Cobra Pilot can sell you replacements and answer installation questions. 

I did not use a slo blo fuse.  I wanted a fuse in the circuit to make sure that they were approx. in spec. 

I communicated with our Cobra Pilot friend a while back.  He said he doesn't deal in E-T-A switch covers. 

Anybody have any advice on proper technique snapping off/on covers?  The parts that hold them in place on the cover are pretty fragile looking.

[PT20J]

25 minutes ago, 0TreeLemur said:

I communicated with our Cobra Pilot friend a while back.  He said he doesn't deal in E-T-A switch covers. 

That was a while back, but I believe he does have a 3D print file for ETA switches now.

[Pinecone]

He does ETA switches now.   I had a friend develop the 3D print file (and thanks to those who helped) and then I donated to the Mooney community.

AH-1Cobra was already making Klixon covers, so it made sense for him to add the ETA to his line.

[0TreeLemur]

One of my problem switches is the Boost Pump.   I have a "bad" Boost Pump switch, but it has a good cover.  Has anyone developed a good technique for removing/replacing ETA switch covers?

[AH-1 Cobra Pilot]

On 11/5/2023 at 11:13 AM, 0TreeLemur said:

One of my problem switches is the Boost Pump.   I have a "bad" Boost Pump switch, but it has a good cover.  Has anyone developed a good technique for removing/replacing ETA switch covers?

I do have ETA switch covers, now.  PM me if you want some.

As old as most of the original plastic switch covers are, they are likely to be very brittle, which will make them susceptible to breaking when you try to remove them, regardless of how you do it.  The Klixons in my 'J' were really brittle, and those covers are more robust than the ETAs.