What was found
WHITE SMOKE FILLED CABIN ON GROUND. SECURED APU BLEED AND SMOKE DISSIPATED. TURNED BLEED ON, PACS OFF. NO SMOKE, OILY ODORS. RAN ACFT & ISOLATED COCKPIT PRE & CAD PAC. WITH COCKPIT PRE RUNNING FOR SEVERAL MINUTES THERE WAS NORMAL OPS & NO OILY ODOR. WITH CAP PAC RUNNING THERE WAS A STRONG OIL ODOR. REMOVED BOTH WATER EVAPERATOR CAPS & FOUND METAL CHIPS IN CAP PAC WATER EVAPORATOR. CLEANED BOTH SOCKETS IN REF TO 750 MM. OK TO INSTALL SOCKS. INSTALLED SOCKS. & EVAPORATOR CAPS IN REF TO 750 MM. REMOVED FWD ACM IN REF TO 750 MM. OK TO INSTALL ACM 4/8 SERVICED ACM OIL LEVEL AND INSTALLED NEW ACM ON A/C IAW 750 MM.