As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER DEPARTING MMU HAD A DAUL ALTERNATOR FAILURE, DIVERTED INTO TEB. MAINTENANCE FOUND NR 1 COMM CIRCUIT BREAKER POPPED. REMOVED AND REPLACED DEFECTIVE NR 1 COMM RADIO CONVERTER, BOTH ALTERNATORS OPS CHECKS GOOD ON BOTH VOLTAGE REGULATORS.