What was found
HOSE / SMOKE IN COCKPIT AND IN UPPER CARGO AREA FROM LT PACK. DEFERRED PER MEL 21-14 DMI 8649 PLACARD INSTALLED ID 34518. REF DMI 8649 HAZE / SMOKE IN COCKPIT AND IN UPPER CARGO AREA FROM LT PACK. CHECKED RT AMD LT COALESER BAGS, NO OIL EVIDENT, OPERATED PACKS WITH APU DUPLICATED PROBLEM. RAN ENGINES 1 & 3, OPERATED A/C PACKS SMOKE CLEARED. APU PRODUCING SMOKE, EVIDENCED BY HIGH OIL USAGE. LT PACK.