As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 8902 FOR MAINTENANCE: ON DESCENT INTO SIT PILOT RECEIVED A DC GEN 1, DC BUS 1 AND AN AC BUS 2 FAILURE. DUE TO FAILURES THE NAVIGATION SYSTEM WAS AFFECTED. PILOTS ELECTED TO RETURN TO JNU FOR MAINTENANCE. AN EMERGENCY WAS DECLARED AND AIRCRAFT LANDED WITHOUT INCIDENT. REMOVED AND REPLACED DC STARTER GENERATOR. AIRCRAFT RETURNED TO SERVICE.