B737-200 LANDS LONG ON A WET RWY; UNABLE TO STOP ON THE RWY AND USES THE OVERRUN. RWY EXCURSION OCCURS.

Narrative

DURING LNDG ROLLOUT ON RWY 35; PASSED THE END OF THE RWY LIGHTS AT A SLOW TAXI SPD. WE HAD TO USE THE OVERRUN TO TURN AROUND. WX WAS RPTED (ATIS) AS 1400 FT SCATTERED; 2500 FT BROKEN; WIND 070 DEGS AT 20 KTS; 10 MI VISIBILITY. WE PLANNED FOR A VOR DME RWY 35 APCH WITH TRANSITION TO VISUAL APCH AS BEING THE MOST LIKELY EVENT. WE APCHED XXXXX AT FLAPS 5 DEGS AND GEAR UP (210-220 KTS) AT 1200 FT AGL. GEAR WAS DOWN AND FLAPS 25 DEGS WITHIN 1 1/2 MI OF YYYYY; SO PROPER CONFIGN WAS APPROX 1 1/2 MI LATE. SPD AND ALT WERE NORMAL. ESTIMATED THE FIELD WAS IN SIGHT AT 540 FT (MDA) AND 3-4 MI FROM THE ARPT. LINED UP ON RWY AND STARTED DOWN FROM MDA (540 FT) AT PAPI GLIDE PATH AT APPROX 10 KTS FAST. OTHERWISE; THE APCH WAS STABILIZED. TWR RPTED THE WINDS AT 26 KTS. (LATER THE ATIS WAS RPTING HVY RAIN AND WINDS 100 DES AT 23 KTS GUSTING TO 26 KTS.) WE ADDED 3 KTS TO THE TARGET SPD. LANDED LONG; ABOUT 2000-3000 FT PAST THE THRESHOLD AND WENT TO 1.3 EPR IN REVERSE THRUST. BRAKING BEGAN SLIGHTLY AFTER TOUCHDOWN AND SEEMED NORMAL WITH DECELERATION ADEQUATE. AT 60 KTS; STOWED THE THRUST REVERSERS WITH MORE THAN 1000 FT OF RWY REMAINING. DECELERATION SUDDENLY SEEMED TO BE BELOW NORMAL; SO INCREASED BRAKE PRESSURE AND GOT ANTI-SKID PULSING. SLIGHTLY REDUCED BRAKING TO MAINTAIN ACFT FROM SLIPPING AND ALLOWED IT TO SLOWLY GO ON TO THE OVERRUN AREA TO A COMPLETE STOP. ESTIMATE THAT THE MAIN GEAR WAS COMPLETELY ON THE OVERRUN. EXECUTED A 180 DEG TURN BACK TO THE RWY AND TAXIED NORMALLY. THE RWY WAS WET ON LNDG. SHOULD HAVE USED FULL BRAKES AND RELIED ON ANTI-SKID. LNDG CLOSER TO THE END AND USING THE ILS APCH TO HAVE MORE TIME TO BE STABILIZED.