What was found
SMOKE FILLED COCKPIT & CABIN AFTER ACTIVATION OF BLEED AIR ON APU. BORESCOPED APU INLET AREA AND IMPELLER. HEAVY AMOUNTS OF OIL THROUGHOUT THE AREA. REMOVED APU IAW MM 498-10-00 AND DRAINED OIL. CLEANED OUT APU CONTAINMENT BOX AS REQUIRED. INSTALLED THE APU IAW MM 49-10-00. APU OPS AND LEAK CHECKED GOOD. INSTALLED CONTAINMENT BOX ACCESS PANEL AND APU ACCESS PANEL. INSTALLED CONTAINMENT BOX, APU ACCESS PANELS. INSTALLED CONTAINMENT BOX ACCESS PANEL. OVERSEALED. INSTALLED APU ACCESS PANEL.