As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(LOG 6067858) WHILE COMPLYING WITH MEL 21-00-01E ON TAXI OUT OBSERVED ODOR SIMILAR TO URINE, APU ON BLEEDS ODOR WENT AWAY WITH CLIMB OUT. ON DESCENT THRU 17,000 BLEED SWITCHED TO APU AND ODOR CAME BACK. FOUND APU OVERSERVICED, REMOVED APPROX 1QT OF OIL TO BRING WITHIN RANGE.