As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IAD/ISP - FLT 6300 - DURING CRUISE AT 1830 HRS ON 8-8-96, MADE AN UNSCHEDULED LANDING DUE TO NR 2 RPM WENT TO ZERO. AIRCRAFT LANDED AT IAD WITH NO FURTHER INCIDENTS. MAINTENANCE REMOVED AND REPLACED TACHOMETER, GENERATOR, OPS CHECK OK. AIRCRAFT WAS RELEASED AND APPROVED FOR RETURN TO SERVICE. (X)