As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT NR 3334 - ON CLIMB-OUT FROM DTW, THE NR 1 TORQUE GAUGE BEGAN TO FLUCTUATE BETWEEN ZERO AND 120 PERCENT. ALL OTHER ENGINE INDICATORS WERE NORMAL. THE AIRCRAFT RETURNED TO DTW. MAINTENANCE REPLACED THE LEFT TORQUE RING. SYSTEM OPERATED SATISFACTORILY. (M)