As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CLT - FLT 272 - DURING CRUISE AT FL 330, THE NR 1 TRANSFORMER RECTIFIER UNIT CIRCUIT BREAKER TRIPPED SEVERAL TIMES AND WOULD NOT RESET. CAPTAIN DECIDED TO DIVERT TO CLT WHERE THE FLIGHT LANDED WITHOUT INCIDENT. NO EMERGENCY WAS DECLARED. MAINTENANCE REMOVED AND REPLACED THE R3 TRANSFER RELAY. GROUND RAN ENGINE. OPS CHECK GOOD. (M)