As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED. STRONG ELECTRICAL BURNING ODOR AT L1 DOOR WHICH DISSIPATED AFTER ENGINES WERE SHUT DOWN. REMOVED AND REPLACED LEFT GENERATOR CONTROL UNIT, LEFT GENERATOR CIRCUIT BREAKER C901(AALA20170110022) AND LEFT BUS TIE BREAKER C902(AALA20170110023). OPERATIONAL CHECK GOOD.