As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 21 - BED-TNN - PASSING THROUGH 4000 FEET, NR 2 ENGINE TORQUE FLUCTUATED ACCOMPANIED BY CORRESPONDING NH ANDN1 INDICATIONS AND AIRCRAFT YAW. CREW RETURNED TO BED. CLEANED CANNON PLUGS AT TSCU AND PERFORMED GROUND RUNS IAW PW MM 72-00-00 PAGES 503-507. ALL PARAMETERS NORMAL. AIRCRAFT RETURNED TO SERVICE WITHOUT FURTHER INCIDENT. (M)