DonMuncy Posted August 21, 2020 Report Share Posted August 21, 2020 Can anyone save me the trouble of pulling the cowling off to look at the CHT probes for the JPI on my 231. I'm trying to figure out which of Aircraft Spruce's probes will substitute. I know they are the type K thermocouples, but I don't remember what the screw-in connector looks like. Quote Link to comment Share on other sites More sharing options...
oregon87 Posted August 21, 2020 Report Share Posted August 21, 2020 I believe JPI does use type K CHT probes and I also believe they are grounded. I'm assuming a replacement will need to satisfy both criteria. The easiest way to determine a type K thermocouple is by simply looking at the wire colors. Type K in the states is red and yellow. 2 Quote Link to comment Share on other sites More sharing options...
kortopates Posted August 21, 2020 Report Share Posted August 21, 2020 you can order JPI probes from Spruce - discounted Quote Link to comment Share on other sites More sharing options...
carusoam Posted August 22, 2020 Report Share Posted August 22, 2020 The JPI site shows this one... 5050T (?) AS has a price about half off... 5010 (?) +1 for qualified TC advice from Oregon! I can’t find matching P/Ns on any of them... use caution. These are both K type, have what looks like the proper well connector and screw connectors on the wire end... PP thoughts only, not a mechanic... Best regards, -a- Quote Link to comment Share on other sites More sharing options...
milotron Posted August 22, 2020 Report Share Posted August 22, 2020 Are replacing these an owner item? I have an EGT probe that is flaking out. Quote Link to comment Share on other sites More sharing options...
carusoam Posted August 22, 2020 Report Share Posted August 22, 2020 As easy as replacing a lightbulb... But... technically you may have to ask your mechanic... A great project to do with your mechanic’s supervision/signature... PP thoughts only, not a mechanic... Best regards, -a- Quote Link to comment Share on other sites More sharing options...
tmo Posted August 25, 2020 Report Share Posted August 25, 2020 The checklist for my 900 lists EGT as P/N M-111; CHT is bayonet P/N 5050; the gasket type would be P/N M-113. I have the physical probes in a box if you want me to look at something specific. Quote Link to comment Share on other sites More sharing options...
DonMuncy Posted August 28, 2020 Author Report Share Posted August 28, 2020 Thanks all. Quote Link to comment Share on other sites More sharing options...
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