What was found
FLIGHT ATTENDANT REPORTED A MUSTY ODOR AT MID AND AFT CABIN WHILE PARKED AT THE GATE AND USED PORTABLE OXYGEN. FLIGHT WAS SUBSEQUENTLY CANCELLED. REMOVED AND REPLACED THE APU.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
FLIGHT ATTENDANT REPORTED A MUSTY ODOR AT MID AND AFT CABIN WHILE PARKED AT THE GATE AND USED PORTABLE OXYGEN. FLIGHT WAS SUBSEQUENTLY CANCELLED. REMOVED AND REPLACED THE APU.