Wanted to buy - KC-192 replacement

[Stetson20]

My autopilot died. "Capacitor C222 has blown" Part 065-0042-02. Looking to buy a replacement with the Form 8130 OR the compatible KC-192 part 065-0042-15. Any leads or ideas? Thanks!

Roy Millwood

[N201MKTurbo]

It seems like a candidate for VARMA LOA. I'm sure the capacitor is a standard part.

[LANCECASPER]

20 hours ago, N201MKTurbo said:

It seems like a candidate for VARMA LOA. I'm sure the capacitor is a standard part.

When a capacitor leaks it sometimes damages the board. If I remember correctly there was a time frame in the 90's where boards were not holding up very well if the capacitor leaked.

@Jake@BevanAviation would know for sure if this capacitor could be replaced and he would be the guy to do it if it could be done.

[larryb]

While I don't know the innards of the KC192, replacing a capacitor on a board is not difficult for a skilled electronics technician. The particular capacitor is not generally critical. Just match the capacitance rating. Voltage rating can be >= the old part. Pretty much any replacement capacitor that is able to physically fit should work. www.mouser.com has thousands of different capacitors in stock.  I would try to find a technician willing to do it before buying a whole replacement unit. 

[flyboy0681]

20 hours ago, larryb said:

While I don't know the innards of the KC192, replacing a capacitor on a board is not difficult for a skilled electronics technician.

A few years ago my unit started smoking in mid-flight and died. When I had the unit removed and opened up, the problem was very apparent. I shipped the unit off to Mid-Continent and had the repaired unit back in my hands within ten days. It's been working great ever since.

[Jake@BevanAviation]

I would try and find a high mod -02 for 14v or -03 for 28v.  The -15 unit was 14/28 but its complete surface mount.  Depending on the extent of the damaged the unit might be BER.  The issue with the cap leakage is when it destroys the traces, specially on the surface mount units where the traces are so small you cant install a jumper.  Not to mention the boards are multilayer PCB.  I would avoid units manufactured between 1991-1998.  They have the most problems with capacitor leakage.   Also, I do not work on the -15 units due to it being surface mount.  However, I can work on the -02 and -03 units.  If you have any questions just give me a call.

[Stetson20]

Thanks all, I've acquired a replacement.

[PT20J]

On 3/15/2024 at 8:10 AM, Stetson20 said:

Thanks all, I've acquired a replacement.

You probably know this, but just in case… Don’t forget to transfer the programming modules, and save the light bulbs from the old unit for spares. The computer and attitude indicator should really be aligned when swapping parts, but try it out - it may work OK.

[amillet]

posted in an older thread earlier today
 

@Jake@BevanAviation My KC 192 was last updated in 2016 by Capital Avionics in FL when I was having trim issues. It’s been working great since. Is there any advantage to preventatively replacing the capacitor that often leaks?

[LANCECASPER]

@Jake@BevanAviation

[Jake@BevanAviation]

@amillet It depends on the year the unit was manufactured. If it is the later revision of half surface mount / half through hole motherboards and if the leakage spreads too far it can damage the circuit traces and render the unit BER. The earlier units are more robust as long as they have been modded up.  Units manufactured between 1991 and 1998 always have capacitor leakage and the older the units are getting the more common it is.  There is normally a red or black 4 digit stamp on the back of the unit around the transducer assembly.  This will tell you the year and week the unit was made.  If for some reason the stamp is missing you have to open the unit and look at the ICs to get a year range.  

[amillet]

I have a 97 J so I assume the KC192 is the later version. Do you recommend replacing the capacitor now as preventative maintenance?