FLT CREW OF B777-200; FATIGUED BY EXTENDED INTL FLT SCHEDULE AND INABILITY TO OBTAIN ADEQUATE SLEEP DURING BREAKS; GETS BEHIND THE AIRPLANE ON APCH TO RKSI AND HAS TO STRUGGLE TO ESTABLISH A STABILIZED CONDITION.

Narrative

THIS WAS THE 4TH DAY OF A 5 DAY SFO PACIFIC IDENT. I HAD NOT SLEPT VERY WELL AT THE HOTEL FOR THE FIRST 2 DAYS OF OUR LAYOVER. THIS WAS A 17 HR TIME ZONE CHANGE. THE FO WAS ALSO EXPERIENCING THE SAME SLEEP DEPRIVATION PROBS. THIS WAS THE END OF A 9 HR DUTY DAY THAT WENT FROM RKSI-ZZZZ-RKSI. OUR HOME TIME WAS XA00-XB00. WE BOTH HAD COMMENTED ON THE WAY BACK ABOUT HOW TIRED WE WERE. ALL WAS NORMAL UNTIL THE APCH CTLR BECAME OVERLOADED AND TURNED US THROUGH THE FINAL AT A 60 DEG HDG AND FORGOT US. WE WERE HEADING 300 DEGS TO INTERCEPT RWY 33R. ATC TURNED US TO 270 DEGS AND FLEW US THROUGH FINAL. A NEW CTLR CAME ON AND TURNED US BACK TO FINAL AND CLRED US FOR APCH. I DISENGAGED THE AUTOPLT TO GET US DOWN AND BACK TO FINAL AND THIS OVERLOADED THE FO (VERY TIRED). IN THE PROCESS THE APCH MODE DID NOT GET ARMED AND THE FLAPS WERE NOT SET AT THE LOWER SETTING FOR THE SPD I HAD CALLED FOR. WE FLEW THROUGH THE FINAL ABOUT 1/4 OF A MI AND GOT ABOUT 10 KTS BELOW THE SELECTED FLAPS. (AUTOTHROTTLES WERE IN THROTTLE HOLD INSTEAD OF SPD.) I WAS ABLE TO CORRECT RIGHT AWAY AND GET ON A STABLE APCH AT ABOUT 7 NM OUT. REST OF APCH AND LNDG WERE NORMAL. THE ACFT WAS NEVER IN DANGER BUT THIS HAD THE POTENTIAL FOR A MORE SERIOUS PROB. THIS IS THE FIRST TIME THIS HAS HAPPENED TO ME AND I FEEL FATIGUE IS A MAJOR ISSUE.