As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DIAGNOSTICS REPORTED THE NR 2 ENGINE TREND DATA SHOWS A SUDDEN SHIFT IN EGT, HDM, AND DEGT. ALL OTHER PARAMETERS ARE NORMAL. INDICATION ERRORS ARE SUSPECT. ACFT GROUNDED. REMOVED AND REPLACED THE NR 2 ENGINE CJ10 HARNESS IAW AMM 73-21-06. OPS NORMAL. GROUND VERIFICATION TESTED GOOD.