As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT NR 6537 - LGA-IAD - DURING CRUISE, EMERGENCY WAS DECLARED AND FLIGHT DIVERTED TO EWR DUE TO THE RIGHT ENGINE EGT AND TORQUE FLUCTUATIONS. AIRCRAFT LANDED AT EWR WITH NO FURTHER INCIDENTS. MAINTENANCE REPLACED THE BETA TUBE O-RINGS AND ADJUSTED THE PROP BLADE ANGLES. AIRCRAFT WAS RELEASED AND APPROVED FOR RETURN TO SERVICE. (M)