GOT OFF COURSE ON FINAL APCH.

Narrative

WE WERE FLYING INTO A FAMILIAR ARPT WITH A RWY BEING LENGTHENED 5000 FT. A LARGE CONCRETE THRESHOLD HAD BEEN POURED AT THE NEW APCH END AND WAS NOW THE MOST DISTINCT LANDMARK ON THE NEW FIELD. AS WE MADE OUR APCH THE SUN WAS QUITE HIGH AND LANDMARKS VERY REFLECTIVE. THE SKY WAS EVEN HAZIER THAN NORMAL; DUE TO A STRONG ON-SHORE FLOW OF VOLCANIC SMOKE. WE ARE NORMALLY CLRED FOR THE VOR DME 17 APCH ABOUT THE SAME TIME WE PICK UP THE FIELD. TODAY; HOWEVER; WE WERE TURNED SHARPLY E TO A 105 DEG HDG TO INTERCEPT THE FINAL APCH COURSE; 157 DEGS INBOUND. I OVERSHOT THE FACILITY WHILE SEARCHING FOR THE FIELD AND TURNED TO A HDG OF ABOUT 170 DEGS TO CORRECT FOR THE OVERSHOOT AND THE WIND. AT THAT TIME; I PICKED OUT WHAT I THOUGHT WAS THE NEW LARGE THRESHOLD. WHILE I WAITED TO GET POSITIVE IDENT; I DIDN'T ADD MORE CORRECTION TO GET BACK ON COURSE AS THE COURSE IS OFFSET TO THE R OF THE RWY. WHEN I PICKED UP THE OLD THRESHOLD ITSELF; IT WAS AHEAD AND SLIGHTLY R. MY LANDMARK WAS NOT THE NEW THRESHOLD. I THEN ASKED FOR AND RECEIVED A 360 DEG TURN TO THE R TO GET IN THE PROPER LNDG SLOT. WHAT DID I RELEARN? 1) NEW CONSTRUCTION SHOULD ALWAYS PUT WARNING FLAPS ON OUR PLANNING. AND 2) IN A VERY FAMILIAR ENVIRONMENT; COMPLACENCY ALWAYS SITS IN YOUR JUMP SEAT.