As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: FUME ODOR EVENT ON DESCENT OXYGEN MASK DONNED. FL 200 IN DESCENT ,HAPPENED IMMEDIATELY AFTER ENGINES WENT TO FLIGHT IDLE. **SUPPLEMENTAL REPORT FOR AALA202109075372: REPLACED APU AND ACCOMPLISHED A SATISFACTORY LEAK / OPERATIONAL CHECK PER TASK CARD 26L31049003** (CLOSED)