As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SMELL OF SMOKE AFTER APU START IN THE AFT CABIN & FLIGHT DECK. MOSTLY DISSIPATED. MET A/C AT GATE W/ 10 FIREMEN. BOARDED A/C IMMEDIATELY- NO ABNORMAL SMELLS THROUGHOUT CABIN. QUESTIONED PAX AT SEVERAL LOCATIONS, NO REPORTS OF SMOKE SMELL. CHECKED BATTERY COMP AND BRAKES FOR HIGH HEAT SIGNATURE -ALL NML. SUSPECT EXHAUST INGESTION FROM GROUND CONGESTION DURING TAXI. A/C OK FOR SVC. (LP# 6557240)