As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SMOKE WAS VISIBLE IN THE COCKPIT AND CABIN 4 MINUTES AFTER THE APU BLEED WAS TURNED ON. APU OIL DPI WAS POPPED AFTER RUN, REMOVED OIL FILTER AND FOUND METAL SHAVINGS, AND FOUND OIL PUDDLES IN APU INLET. REMOVED APU IAW MM 49-10-00. INSTALLED SERVICEABLE APU REF MM 49-10-00. OPS AND LEAK CHECKED GOOD. NO SMOKE OR MUSTY ODOR DETECTED IN CABIN WITH APU RUNNING.