As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BTV - FLT 4625 - CREW REPORTED ERRATCI ENGINE INDICATIONS ON NR 2 ENGINE. PROPELLER RPM FLUCTUATES PLUS/MINUS 1000. AFTER TORQUE MOTOR LOCKOUT THERE WERE NO MORE FLUCTUATIONS NOTED. MAINTENANCE REMOVED AND REPLACED RIGHT ENGINE HYDROMECHANICAL FUEL CONTROL UNIT. OPS AND LEAK CHECK WAS GOOD AND AIRCRAFT WAS RETURNED TO SERVICE. (M)