ETA Switch Part Numbers

[Speed Merchant]

I am looking for the switch parts numbers for the ETA. The maintenance manual says see 800 330 (E7) for my serial (1443) but the copy is not legible. Can anyone help me with the part numbers for the foll0wing? I am trying to the part number, contact rating and amp rating for each.

Master Switch

Radio Master Switch

Strobe Lights Switch

Landing Lights Switch

Pitot Heat Switch

Elev Trim Switch

Boost Pump Switch

 

Thanks

 

[testwest]

You need a copy of the Illustrated Parts Catalog for your M20J airplane. All of the switch part numbers except for the Master start with 930023-*. The asterisk is a three digit number depending on the type.

 

In the parts list, there will be a bewildering set of switches for each position, you have to match the effectivity of the part number to your airplane....and serial number 1443 matches a lot of effectivity numbers for this section (39-10-00) of the IPC. This is a fun exercise looking up roman numerals in this chart here:

Everything about this is a struggle, for the Master switch there is only one, and it is not an E-T-A switch breaker combo. It's a Cutler-Hammer 8911K828, Mooney part number 880052-501. Looking at effectivity XXIV above we see the serial numbers are for #1686 and later, and there is no listing for any earlier model.

At least here is a picture:

 LASAR is out of stock on these, but at least you can see the switch rating.

Now, let's do the radio master. From the above, 930023-013 is for effectivity XXXVIII, that is for S/N 001-1463. Yours is 1442, and I guarantee that is a Klixon, not an E-T-A. The white E-T-A switches cut in on s/n 1464, see below:

930023-213, effectivity XXXIX, that is 1464 and on, skipping a few blocks of serial numbers. BUT, WATCH OUT, there are also 930023-***A switches out there, these are Klixon substitutes for unobtanium E-T-As:

3 amps on this one, which is the -3 on that part number 20TC2-BG-3 from Klixon you see there.

And the Radio Master is installed "upside down" so when the circuit is open the switch is "on" meaning the radio master relay is closed. It is a real puzzler. If you want a BLACK E-T-A radio master (930023-313) good luck. I got one for our 201 but it took 10 years of monitoring the used markets and salvagers to get one.

Even the wiring diagram for your serial number in the Mooney thumb drive is not legible. You will need to go back and forth between the picture above, the parts list and effectivity numbers, and the pictures on LASAR's web site to piece together this puzzle. Good luck....I changed all of the old white Klixon switches on ours to black E-T-As when they were more available...I don't think I would do that again though, since the E-T-A switches (part 41-10-P10 in various amperages) are no longer in production.

 

 

[tmo]

One of the times I wish I could do both a "like" and a "thanks".

[Speed Merchant]

On 10/23/2020 at 11:44 PM, testwest said:

You need a copy of the Illustrated Parts Catalog for your M20J airplane. All of the switch part numbers except for the Master start with 930023-*. The asterisk is a three digit number depending on the type.

 

In the parts list, there will be a bewildering set of switches for each position, you have to match the effectivity of the part number to your airplane....and serial number 1443 matches a lot of effectivity numbers for this section (39-10-00) of the IPC. This is a fun exercise looking up roman numerals in this chart here:

Everything about this is a struggle, for the Master switch there is only one, and it is not an E-T-A switch breaker combo. It's a Cutler-Hammer 8911K828, Mooney part number 880052-501. Looking at effectivity XXIV above we see the serial numbers are for #1686 and later, and there is no listing for any earlier model.

At least here is a picture:

 LASAR is out of stock on these, but at least you can see the switch rating.

Now, let's do the radio master. From the above, 930023-013 is for effectivity XXXVIII, that is for S/N 001-1463. Yours is 1442, and I guarantee that is a Klixon, not an E-T-A. The white E-T-A switches cut in on s/n 1464, see below:

930023-213, effectivity XXXIX, that is 1464 and on, skipping a few blocks of serial numbers. BUT, WATCH OUT, there are also 930023-***A switches out there, these are Klixon substitutes for unobtanium E-T-As:

3 amps on this one, which is the -3 on that part number 20TC2-BG-3 from Klixon you see there.

And the Radio Master is installed "upside down" so when the circuit is open the switch is "on" meaning the radio master relay is closed. It is a real puzzler. If you want a BLACK E-T-A radio master (930023-313) good luck. I got one for our 201 but it took 10 years of monitoring the used markets and salvagers to get one.

Even the wiring diagram for your serial number in the Mooney thumb drive is not legible. You will need to go back and forth between the picture above, the parts list and effectivity numbers, and the pictures on LASAR's web site to piece together this puzzle. Good luck....I changed all of the old white Klixon switches on ours to black E-T-As when they were more available...I don't think I would do that again though, since the E-T-A switches (part 41-10-P10 in various amperages) are no longer in production.

 

 

Thank you sooo much for the amazing write up I really appreciate your help. That is exactly what I needed! Have an awesome day!

Curt

[testwest]

You are welcome, and good luck!