As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW RETURNED TO THE FIELD AFTER THE LEFT ENGINE EGT STARTED TO FLUCTUATE. MAINTENANCE GROUND RAN WITH SRL OFF, NO FLUX NOTED. THE SYSTEM WAS DEFERRED. THE SYSTEM WAS INSPECTED AND FOUND A WIRE BROKEN AT THE ENGINE EGT SHORT LEAD. THE WIRE WAS REPLACED, ENGINE GROUND RAN WITH FLUCTUATIONS NOTED.