As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SHORTLY AFTER DEPARTING OUT OF TEB RIGHT ALTERNATOR SPIKED AND KNOCKED BOTH COMM'S OFF LINE. TURNED POWER OFF THEN ON AND SELECTED NR 1 VOLTAGE REGULATOR THE RADIO'S CAME BACK ON LINE. MAINTENANCE IN SYR REMOVED AND REPLACED NR 2 VOLTAGE REGULATOR OPS CHECKS GOOD.