FlightDek180

[namjab]

More questions

During my last oil change (sticking to 25 hours) I also asked for my D180 sensors to be checked. (J430 - 3300)
My No3 was usually much hotter than the rest. Grounding was thought to be the culprit and repaired.
Since then, my number 1 reports cold temps, jumping between 1c and 180c. I am thinking it lost ground or was perhaps not seated correctly during spark plug removal? This is for CHT.

Also, I was wondering why my steam gauge shows EGT of around the 600's whereas the sensors that appear stable on the D180 all do 700's C. Can the analogues be trusted? Plane flies like a dream. Steap take offs below 70kn at 30C OAT will result in the D180 stating 750C on number 6, but not even close to that on steam gauge. CFI advised me to climb at 85 to 90kn, that also sorted out the EGT on the D180, staying close to 710/720.

All in all, I do feel she is healthy, but I would like to put more faith into the D180 instead of where it is now and one thinks it is a fault and all is actually well.

Cheers all.

[ZuluBen]

Those analogue guages are not worth their weight in toilet paper ...

At the CHT, look for a loose connection between the 2 wires in the cable and the lug that sits under the plug.

[T4flyer]

I just had the same thing happen, plugs changed by the AMO during the service then one CHT starts jumping from zero to "hell n gone". Its a pretty common issue with the under the spark plug CHT sensors, you remove the plugs then as you are tightening them up again you twist the little sensor ring just enough to pull the wires apart at the terminal. I was feed up with that so I did the CHT probe modification and now my CHT sensors screw into the head between the spark plugs

Cheers, Don.

[antonvalks]

I just had the same thing happen, plugs changed by the AMO during the service then one CHT starts jumping from zero to "hell n gone". Its a pretty common issue with the under the spark plug CHT sensors, you remove the plugs then as you are tightening them up again you twist the little sensor ring just enough to pull the wires apart at the terminal. I was feed up with that so I did the CHT probe modification and now my CHT sensors screw into the head between the spark plugs

Cheers, Don.

Don, who did the modification for you and what was rhe cost more or less?

[Marius Schrenk]

I just had the same thing happen, plugs changed by the AMO during the service then one CHT starts jumping from zero to "hell n gone". Its a pretty common issue with the under the spark plug CHT sensors, you remove the plugs then as you are tightening them up again you twist the little sensor ring just enough to pull the wires apart at the terminal. I was feed up with that so I did the CHT probe modification and now my CHT sensors screw into the head between the spark plugs

Cheers, Don.

Don, who did the modification for you and what was rhe cost more or less?

Drill a hole and tap it.....about 1 hr work (on all 6 cyl).....but they too can bugger around......instead of having a 16 mm contact area around the plug you now have a 6 mm contact area around a 3 mm bolt......and like it or not the engine vibrate.

[ZuluBen]

The newer cyl heads already have the holes drilled and tapped between the 2 spark plugs.