As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
VISIBLE NOXIOUS CLOUD FROM PACKS WHEN USING APU AIR. FUMES REMAIN AFTER APU INOPERATIVE. ODOR TASTED LIKE VAPORIZED OIL. LAST LEGS FUMES INCREASING DURING FLIGHT. R & R APU SPEED PROBES PACKINGS AND R & R LT AND RT COALESCER BAGS IAW AMM 21-54-08, LEAK AND OPS CHECKED GOOD.