Narrative:

I was returning from a medical flight from mexico. I landed at calexico, ca, to go through customs and refuel. It was very hot, 104 degrees and when I departed I experienced difficulty in starting the engines. After much waiting and cranking it finally started. As I was climbing I noticed the ammeter indicated a strong charging cycle. Just before I reached julian VOR I noticed the gauge was discharging. I immediately recycled the alternator switch to see if it would reengage but it didn't. I shut down all electrical use except the DME and 1 radio. Initially, I planned on landing at palomar airport (near san diego) but it was IFR (fog). At that point fallbrook airport was the next closest. I radioed unicom and was told it was clear. I descended and dropped the gear, which drained the battery. As I got close to fallbrook, they radioed to tell me they thought the gear was all the way down. I flew low over the airport and manually pumped the gear pump. I had a confirmed green light and at that point the battery gave up, all electrical was off. Before I lost the electrical, I lowered flaps, but was only able to get 5/8 degree flaps. I set up an approach for runway 18 (the active runway). The plane floated a bit and set down with rollout. I had excessive speed and was on the brakes upon touchdown. The runway was short (2100 ft). I realized it wasn't going to stop by the end of the runway. The last 100 ft or so I was unable to move the front wheel and as a result the plane exited the runway at the left end corner. There was a 12-15 ft slope leading down to a freshly plowed level field. When the plane stopped, it was upright, all passenger exited the plane. No one was injured in any fashion. All system were shut down. All seats shoulder straps installed in addition to the seat belts. The damage, thus far, is the front wheel broke off, the right strut bent back under the plane with its wheel broken off. The propeller struck the soft earth and 1 blade was loose, not bent. On the underbelly, by the front wheel, there appears some indention of the skin. There is no other apparent damage to wings or structural components. I suspect the cause of the electrical failure is the regulator or at the outside the alternator. This has been reported to the san diego GADO office for their review. At no time did I feel out of control or that it was the wrong judgement call to land at fallbrook. During this flight I was carrying, as a passenger, an AME, who observed me carefully and complemented my handling of this event.

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Original NASA ASRS Text

Title: RWY EXCURSION IN LNDG PROC OVERSHOT AFTER PRIMARY ELECTRICAL SUPPLY PROB CAUSED DIVERSION TO ALTERNATE ARPT.

Narrative: I WAS RETURNING FROM A MEDICAL FLT FROM MEXICO. I LANDED AT CALEXICO, CA, TO GO THROUGH CUSTOMS AND REFUEL. IT WAS VERY HOT, 104 DEGS AND WHEN I DEPARTED I EXPERIENCED DIFFICULTY IN STARTING THE ENGS. AFTER MUCH WAITING AND CRANKING IT FINALLY STARTED. AS I WAS CLBING I NOTICED THE AMMETER INDICATED A STRONG CHARGING CYCLE. JUST BEFORE I REACHED JULIAN VOR I NOTICED THE GAUGE WAS DISCHARGING. I IMMEDIATELY RECYCLED THE ALTERNATOR SWITCH TO SEE IF IT WOULD REENGAGE BUT IT DIDN'T. I SHUT DOWN ALL ELECTRICAL USE EXCEPT THE DME AND 1 RADIO. INITIALLY, I PLANNED ON LNDG AT PALOMAR ARPT (NEAR SAN DIEGO) BUT IT WAS IFR (FOG). AT THAT POINT FALLBROOK ARPT WAS THE NEXT CLOSEST. I RADIOED UNICOM AND WAS TOLD IT WAS CLR. I DSNDED AND DROPPED THE GEAR, WHICH DRAINED THE BATTERY. AS I GOT CLOSE TO FALLBROOK, THEY RADIOED TO TELL ME THEY THOUGHT THE GEAR WAS ALL THE WAY DOWN. I FLEW LOW OVER THE ARPT AND MANUALLY PUMPED THE GEAR PUMP. I HAD A CONFIRMED GREEN LIGHT AND AT THAT POINT THE BATTERY GAVE UP, ALL ELECTRICAL WAS OFF. BEFORE I LOST THE ELECTRICAL, I LOWERED FLAPS, BUT WAS ONLY ABLE TO GET 5/8 DEG FLAPS. I SET UP AN APCH FOR RWY 18 (THE ACTIVE RWY). THE PLANE FLOATED A BIT AND SET DOWN WITH ROLLOUT. I HAD EXCESSIVE SPD AND WAS ON THE BRAKES UPON TOUCHDOWN. THE RWY WAS SHORT (2100 FT). I REALIZED IT WASN'T GOING TO STOP BY THE END OF THE RWY. THE LAST 100 FT OR SO I WAS UNABLE TO MOVE THE FRONT WHEEL AND AS A RESULT THE PLANE EXITED THE RWY AT THE L END CORNER. THERE WAS A 12-15 FT SLOPE LEADING DOWN TO A FRESHLY PLOWED LEVEL FIELD. WHEN THE PLANE STOPPED, IT WAS UPRIGHT, ALL PAX EXITED THE PLANE. NO ONE WAS INJURED IN ANY FASHION. ALL SYS WERE SHUT DOWN. ALL SEATS SHOULDER STRAPS INSTALLED IN ADDITION TO THE SEAT BELTS. THE DAMAGE, THUS FAR, IS THE FRONT WHEEL BROKE OFF, THE R STRUT BENT BACK UNDER THE PLANE WITH ITS WHEEL BROKEN OFF. THE PROP STRUCK THE SOFT EARTH AND 1 BLADE WAS LOOSE, NOT BENT. ON THE UNDERBELLY, BY THE FRONT WHEEL, THERE APPEARS SOME INDENTION OF THE SKIN. THERE IS NO OTHER APPARENT DAMAGE TO WINGS OR STRUCTURAL COMPONENTS. I SUSPECT THE CAUSE OF THE ELECTRICAL FAILURE IS THE REGULATOR OR AT THE OUTSIDE THE ALTERNATOR. THIS HAS BEEN RPTED TO THE SAN DIEGO GADO OFFICE FOR THEIR REVIEW. AT NO TIME DID I FEEL OUT OF CTL OR THAT IT WAS THE WRONG JUDGEMENT CALL TO LAND AT FALLBROOK. DURING THIS FLT I WAS CARRYING, AS A PAX, AN AME, WHO OBSERVED ME CAREFULLY AND COMPLEMENTED MY HANDLING OF THIS EVENT.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.