As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT NR 6416 - IAD-CHS - DURING CLIMB-OUT, RETURNED TO IAD DUE TO THE NON ESSENTIAL BUSS FAILING IN FLIGHT. AIRCRAFT RETURNED TO IAD WITH NO FURTHER INCIDENTS. MAINTENANCE REPLACED THE RIGHT POWER DISTRIBUTION UNIT. AIRCRAFT WAS RELEASED AND APPROVED FOR RETURN TO SERVICE. (M)