What was found
DURING AN INSPECTION MECHANIC REMOVED AFT XMSN LUBE FILTER & NOTICED LARGE METALLIC CHIPS IN THE FILTER HOUSING & ON THE FILTER PACKS. DISASSEMBLED FILTER & FOUND MORE CHIPS. DUE TO A PREVIOUS EXPERIENCE ON N6682D, CREW CHIEF DIRECTED MECHANIC TO REMOVE BLOWER DRIVE SHAFT & REMOVE BLOWER INPUT COVER ON THE XMSN TO DETERMINE WHETHER THE CHIPS CAME FROM THE BLOWER INPUT SEAL ON THE XMSN. IT WAS DETERMINED THE RING INSIDE THE SEAL THAT'S CONNECTED TO METAL TABS TO KEEP THE SEAL TIGHT AROUND THE BLOWER INPUT WAS MISSING. MX NOTIFIED THE DOM AS WELL AS THE LEAD IN THE XMSN SHOP ON HOW TO PROCEED. DECIDED TO SEND A REPLACEMENT AFT XMSN ASSEMBLY TO THE WORK SITE.