As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APU START FAILED RAMP REPORTED EXCESSIVE AMOUNT OF SMOKE FROM APU ( APU INOP ). REMOVED FROM SERVICE. SUCCESSFULLY STARTED APU MULTIPLE TIMES. NO SMOKE PRESENT DURING OPERATION. NO PRIOR HISTORY OF APU FAILURE SINCE JANUARY. CLEARS MEL. NO PARTS REPLACED. AIRCRAFT RETURNED TO SERVICE.