As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RIGHT EEC CAUSES TORQUE INDICATION TO FLUCTUATE. RETURNED TO SFO. COMPLETED ENGINE RUN OF RIGHT ENGINE UP TO 100 PERCENT TQ. NO TQ FLUCTUATIONS NOTED. ALL ENGINES INDICATIONS NORMAL WITH EEC IN MANUAL. CLEANED AND OHMED DIRTY CANNON PLUGS. RAN ENGINE IAW MM 72-00-00. OPS CHECKS GOOD WITH NO TORQUE FLUCTUATION.