What was found
AFTER PARKING THE APU GENERATOR FAILED. APU THEN PROCEEDED TO FAIL AND ODOR FILLED CABIN WITH SLIGHT HAZY SMOKE FILLING CABIN AS WELL. CREW COMPLETED SMOKE/ODOR IN THE PLANE QUESTIONAIRE ACCOMPLISHED MAGNETIC CHIP COLLECTOR INSPECTION IN REF TO AMM 49-27-25-206-001-001. FOUND LARGE QUANTITY OF SILVER AND NON SILVER PARTICLES FOR THE MIDFRAME SCAVENGE PUMP CHIP DETECTOR. REMOVED APU IAW AMM 49-11-01-004-109-001. INSPECTED FIRE WALL & EFFECTED SYSTEMS PRIOR TO APU INSTALLATION. INSTALLED NEW APU REF AMM 49-11-01/401. OPS CHECK AND LEAK CHECK GOOD. .REF AMM 49-11-01 , PER RII GMM 09-25-05 AND IDT GMM 09-10-05.