As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APU WILL NOT HOLD ELECTR ICAL POWER, GROUND CREW SAW A PUFF OF SMOKE FROM APU. FUMES IN FLT DECK STARTED APU IAW 49-11-00. VERIFIED NO SMOKE OR FUMES ON START. REMOVED GROUND POWER, APU CONTINUED TO RUN WITH NO ISSUES NO FOUL ODOR DETECTED.