As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE FLIGHT CREW REPORTED THAT THE NO 1 ENGINE N1 FLUCTUATED AT CRUISE AND ALSO RECEIVED AN AMBER COMPUTER NO 1 ANNUNCIATOR. THE MAINTENANCE VENDOR TROUBLESHOT, PER HONEYWELL TECH SUPPORT AND DETERMINED THAT THE P1-16 ENGINE WIRING HARNESS WAS DEFECTIVE. THE HARNESS WAS REMOVED AND A NEW HARNESS WAS INSTALLED. GROUND OPERATION CHECKS WERE SATISFACTORY.