What was found
ERRATIC SAT INDICATIONS IN FLIGHT. SAT SHOWED +61 DEGREES CELSIUS AT 6000 FT MSL. AS SAT INDICATIONS CLIMBED, YD FAILED AND WOULD NOT REENGAGE, PROP DEICE CAUTION ILLUMINATED, AND AIII STAYED IN STBY ON APPROACH, WOULD NOT CAPTURE AIII. RETURNED TO FIELD AND ACCOMPLISHED A UNEVENTFUL LANDING. REPLACED STATIC TEMP PROBE IN REFERENCE TO AMM 34-11-11-000/400-801. OPS CHECKS GOOD. GROUND RAN AT 1020 PROP RPM, NO CAUTIONS ILLUMINATED. NO FAULTS IN CDS. RETURNED TO SERVICE.