CHT trouble with 2006 Cessna 206 stationair G-1000

CHT trouble with 2006 Cessna 206 stationair G-1000

We recently bought a Cessna 206 TH Stationair 2006 (G-1000) with only 130 hours. During my firsts flights I realize that the cylinder head temperature (CHT), showed by the G-1000, starts to increase without reason, passing the red line and showing the red "X" for all the cylinders. During that, all the other gauges were complete OK and a few minutes later the instrument "reacts" and the CHT jump to show numbers in the green zone. This problem has been appreciated several times (always after more than 2 hours of running), and always the oil pressure and temperature were ok. Other interesting point is that in all these events, the advisory window never shows any warning, which is more confuse because an instrument is showing a critical situation while the warning system is telling you everything is OK.

I want to ask if this situations are normal for the G-1000?, especially in an almost new equipment. There are some tips to prevent this type of malfunctions? (i.e. clean some contacts, reset the software, check the connection to the cylinders, etc.)
There are more reports about this problem in Cessna 206 G-1000?

Regards
Raimundo Prieto

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Re: CHT trouble with 2006 Cessna 206 stationair G-1000

Raimundo,

I do not have direct experience on the G1000 system but have extensive experience on similar systems used on larger Digital systems as utilized on Gulfstreams,and the Global Express. On those airplanes most system indications are generated by an analog sensor that sends the signal to a Data Aquisition Unit (DAU) this unint translates the analog data into digital format so that it can be displayed on the nice bright screens. The advantage of Digital data is that it can be interrogated both ways by the DAU. I am sure the G1000 has something similar with probably a different accronym. Nevertheless, as with most computer applications, the data can become erratic or fall outside certain parameters for just a split second making it unreliable. Larger Aircraft have dual sensors for every paramter so that the data can be compared. I don't imagine that smaller aircraft such the C206 have much of tha due to space limitations. Therefore, I would think that problems such as the one you're seeing are quite common. If there is no other parameter corroborating what you're seeing, I would suspect it to just be an indication problem. In these "digital aircraft" sometimes simply re'setting a circuit breaker or re-racking a unit (that is to say remove and re-install) clears a lot of problems.I would recommend you become familiar with the location of each of these boxes that send information to your displays and ensure all connections are secure and cleaned periodically. 

I hope that this helps just a little. you got yourself a great airplane.

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