As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON PUSHBACK NOTED BATTERY DISCHARGE ON ALL BATTERIES OF GREATER THAN 0.4. TURNED OFF APU GEN BATTERY LOAD REDUCED TO 0.3. UNABLE TO REINGAGE APU GEN. AFTER TWO ATTEMPTS NOTICED ELECTRICAL SMELL. SHUT DOWN APU. SMELL DISSIPATED. ( APU INOP ). REMOVED & REPLACED APU DC STARTER/GEN IAW AMM 24-33-01-000/400-801. OPS CHECK GOOD. REF FIM 49-40-00-810-806 DUE TO FAULT CODE 103-2 FAIL TO CRANK. NO MORE ELECTRICAL SMELL AND ALL LOADS ON BATTERIES CHECK GOOD & ALSO VOLTAGES CHECK GOOD.