As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SEA - DURING TAXI TO GATE AFTER LANDING OF FLT 85 - CREW REPORTED THE AIRBORNE AUXILIARY POWER UNIT SHUTDOWN. THE AIRBORNE AUXILIARY POWER UNIT HAD TURBINE WHEEL MATERIAL FAILURE WHICH RESULTED IN PIECES PENETRATING THE PLENUM. THERE WAS NO DAMAGE TO THE ENCLOSURE OR TO THE AIRCRAFT STRUCTURE. REPLACED THE AIRBORNE AUXILIARY POWER UNIT AND OPERATED NORMALLY. (M)