As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON TAXI OUT STRONG SMOKE/ODOR AROUND ROWS 4-6 NOTICED BY CREW AND PASSENGERS AFTER BOTH APU AND ENGINES WERE STARTED. MX INSPECTED APU AREA FOR OIL LEAKS AND FOUND LOSE BOOT CLAMPS AND TIGHTENED. PERFORMED HIGH ENGINE POWER RUN WITH BOTH PACKS NO ODOR NOTED. SYS OPS IS NORMAL.