As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 6283 - IAD-HPN - DURING CRUISE, AIRCRAFT MADE A UNSCHEDULED LANDING DUE TO RT EGT FLUCTUATION WITH TTL/SRL ON/OFF NO EFFECT. MAINTENANCE INSPECTED AND OPENED DMI 49637, MEL 61-1 ON PROP SYN. MAINTENANCE CLOSED DMI 49637 ON 10-19-97 BY REMOVING AND REPLACING PROP SYNC CONTROL BOX. OPS CHECK OK. AIRCRAFT WAS RELEASED AND APPROVED FOR RETURN TO SERVICE. (M)