Hello there,

I am looking for some advice.  I had the plane (TSIO 550) out of annual about 15 minutes into the air and the TIT 1, TIT 2 and P temps on the VM1000 all read 0000.  The EGTs and the CHTs on all cylinders work fine as do the engine instruments.  I don’t think this sounds like a single probe failure, but why that pattern?  Any ideas would be appreciated.  The local avionics shop isn’t up to speed and before I get it torn apart, if someone had this experience, I’d appreciate hearing about what you did.

The unit is 12 years old and has 1200TT.

Michael Smith