As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 6356 - PWM-BOS - DURING CLIMB, MADE AN UNSCHEDULED LANDING DUE TO RIGHT RMU FAILED. AIRCRAFT RETURNED TO THE GATE WITH NO FURTHER PROBLEMS. MAINTENANCE REMOVED AND REPLACED RMU, OPS CHECK OK. AIRCRAFT WAS THEN RELEASED AND APPROVED FOR SERVICE. (M)