As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ACID SMELL IN CABIN AND FLIGHT DECK FOLLOWED BY INTERMITTENT APU GENERATOR OFF BUSS MESSAGE ON EICAS. COULD NOT DUPLICATE SMELL IN CABIN OR FLIGHT DECK. PERFORMED ELECTRICAL SYSTEM INSPECTION ON WINDSHIELD CONTROLLER TERMINALS WITH NO DEFECTS. FOUND APU STARTER GENERATOR SEIZED. REMOVED AND REPLACED APU STARTER GENERATOR IAW AMERICAN EAGLE WORK CARD 24-800-01. OPERATIONAL CHECK GOOD, RETURNED AIRCRAFT TO SERVICE.