As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APU AUTO SHUTDOWN & CREW NOTED SMOKE IN CABIN SHORTLY AFTER. R & R BOTH CABIN RECIRC FILTERS IAW AMM 21-21-41/401. ACCOMPLISHED PACK DECONTAMINATION IAW AMM 21-00-00-615-802-A. RAN ENGINES FOR 30 MINUTES AND ODOR DISSIPATED. R & R RECIRC FILTERS AGAIN AS A PRECAUTION IAW AMM 21-21-41/401. GOOD TO CONTINUE, APU DEFERRED REF LP 9910181.