As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SHIP 3272 DISC: STRONG ROTTEN EGGS SMELL DURING TAXI IN COCKPIT AND FWD GALLEY. C/A: RAN APU WITH BLEED AND OPERATED PACKS INDIVIDUALLY AND SIMULTANEOUSLY THROUGH FULL RANGE. NO PRESENCE OF ODOR THROUGHOUT OPS CK. PER CARD 0550-2002 STEP 18. TYPE 10 (C) THE CAUSE WAS AMBIENT AIR ODOR. (LP: 6423656)