As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DIAGNOSTICS REPORTS NR 2 ENGINE TREND DATA SHOWS A SHIFT IN EGT HOT DAY MARGIN ALL OTHER PARAMETERS NORMAL. EGT INDICATION ERRORS ARE SUSPECT. GROUNDED - YES. REMOVED THE NR 2 ENGINE CJ9 HARNESS PER AMM 73-21-06/401. INSTALLED NEW CJ9 HARNESS ON ENGINE NR 2. OPERATIONAL CHECK GOOD.