What was found
SYS A HYD QTY IND DROPPED TO ZERO QTY APPROX ONE HR AND 20 MINS INTO FLT. NR 1 ENG HYD LOW PRESS LIGHT ILLUMINATED. CHECKLIST PROCEDURE INITIATED LANDING UNEVENTFUL. GROUND INVESTIGATION LEAKING HALF WAY POINT LEFT WING. FOUND NR 2 SPOIL-ER RETURN LINE CRACKED BELOW NR 3 SPOILER. REPLACED LINE WITH TEMP FLEX LINE. CYCLED FLAPS AND SLATS SEVERAL TIMES, NO LEAKS FOUND. NO CLEARANCE PROBLEMS FOUND. THIS WAS AN EMERGENCY LANDING INTO PDX. A/C CALLED 20 MINS OUT BEFORE LANDING IN PDX.