SMA HAS ELECTRICAL FAILURE. ELECTS TO CONTINUE FLT USING PILOTAGE. RECEIVES LIGHT SIGNAL BUT LANDS ON CLOSED RWY.

Narrative

WHILE ON A VFR TRIP TO BISMARCK; ND; ON THE MORNING OF JUN/XX/92; I LOST ALL MY ELECTRICAL PWR APPROX 30 MI SW OF BISMARCK. I WAS FROM CENTENNIAL ARPT IN ENGLEWOOD; CO (DENVER). THE AIRPLANE HAD AN ANNUAL APPROX 3 MONTHS BEFORE TRIP. I GOT OUT MY VFR MAPS AND NAVIGATED BY COMPASS COURSE AND LINES TO BISMARCK. I ENTERED THE PATTERN AND WAS FLYING UP TO 21L RWY. THE TWR GAVE ME A GREEN LIGHT. I THEREFORE OVERFLEW THE RWY; DID A 360 DEG BASE FINAL; LANDED ON THE RWY. IT TURNED OUT THAT THE RWY WAS CLOSED (INDICATED ON ATIS) AS THERE WERE CONTRACTORS ON THE OTHER END OF THE RWY. THEY GAVE ME RED/GREEN ON MY APCH; HOWEVER; BY THIS TIME I WAS WATCHING LNDG AREA AND NOT TWR. NO CLOSED MARKINGS WERE ON THE RWY. MY RUNOUT ON THE GND WAS VERY SHORT AND I WAS MANY YARDS FROM ANYONE ON THE RWY. I SHOULD HAVE NOTICED THE LAST SIGNALS FROM THE TWR; CONTINUED CIRCLING. ALSO; THEY SHOULD HAVE PUT A TEMPORARY X ON THE RWY THRESHOLD. BROKEN LEAD ON THE GENERATOR WAS THE CAUSE OF THE ELECTRICAL FAILURE. I HAD THE GENERATOR OVERHAULED LEAD REPAIRED BEFORE DEP.