As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GNDED. DIRTY, MUSTY ODOR IN CABIN. REPORTED BY FLIGHT ATTENDANTS AFTER TAKEOFF & BELOW 10000' ON APPROACH. ACCOMPLISHED JC 26L00021001 TROUBLE SHOT CABIN AIR QUALITY & JC 26L00021002 APU ODOR IN CABIN. SOURCE OF ODOR TRACED TO APU. REPLACED THE APU IAW TASK CARD 26L00021004.