As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DIRTY SOCK SMELL REPORTED BY FLIGHT ATTENDANTS ON THE GROUND DURING TAXI OUT AND ON DESCENT INTO PHX. MAINTENANCE REMOVED AND REPLACED THE APU AND PERFORMED ECS DECONTAMINATION. THE APU INLET WAS DIRTY BUT THERE WAS NO INDICATION OF OIL OR INTERNAL LEAKAGE. APU WAS NOT CONFIRMED AS SOURCE OF ODOR; HOWEVER, NO SUBSEQUENT CABIN ODOR EVENTS HAVE BEEN REPORTED TO DATE (APPROX. ONE MONTH LATER).