As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SMOKE IN CABIN. SUPPLEMENTAL DATA UPDATE FOUND COOLING FAN SHAFT SHEARED AND FAN HOUSING BROKEN. THIS IS THE LATEST CONFIGURATION (-6) WHICH WAS INSTALLED ON THIS APU ON JUNE 11, 1999. THIS HAS BEEN A LONG TIME PROBLEM, AND HONEYWELL IS WORKING ON FIXING THESE COOLING FAN FAILURES RESULTING IN APU REMOVALS.