As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 7207 - IAD-PHF - DURING CLIMB, AIRCRAFT MADE AN UNSCHEDULED LANDING DUE TO RIGHT ENGINE RPM INDICATION FAILED. AIRCRAFT RETURNED TO THE GATE WITH NO FURTHER PROBLEMS. MAINTENANCE INSPECTED AND REMOVED AND REPLACED TACH GENERATOR. OPS CHECK OK. AIRCRAFT WAS RELEASED AND RETURNED TO SERVIE. (M)