What was found
DURING DESCENT, FUMES AND HAZE APPEARED IN THE COCKPIT AND CABIN. DONNED MASKS & PERFORMED SMOKE CHECKLIST. PASSENGERS & F/A COMPLAINED OF NAUSEA & DIZZINESS. HOT CHEMICAL ODOR. LANDING UNEVENTFUL. GROUND IDLE RUN ODOR RETURNED. FERRIED, REPLACED HYD LINE, PN 82974103-003 ON NR 1 ENGINE AT MIDFRAME ABOVE P2.7 VALVE. IT WAS FOUND TO BE LEAKING. ALSO PERFORMED BOROSCOPE OF BOTH ENGINES. NR1 CHECKED OK. NR 2 FOUND OIL FROM THE NR 5 OIL PRESSURE BEARING TUBE. REPLACED THE ENGINE. ALSO CLEANED THE NACELLES INTERIOR. PERFORMED CHECK FLIGHT AND PASSED. RETURNED TO SERVICE.