Narrative:

En route in VFR conditions and on a beacon code with ATC; our plane suffered a primary electrical failure which I discovered by my normal scan of the ammeter and engine analyzer (which shows battery output in its scroll). I activated the standby alternator and decreased the load by turning off non-essential equipment. I reviewed the emergency checklist and advised ATC of the electrical loss. Shortly thereafter; the standby alternator failed as well. All communication with ATC were lost. The engine continued to operate normally. I began to consider landing options: I was over mountainous terrain and was unfamiliar with airports in the vicinity. Since the engine was operating normally and it was VFR at my destination; I decided to continue on to ZZZ1 approximately 15-20 mins away; where I was very familiar with the field. I continued to consider landing options and since; without power; I had no way of confirming that the gear was down and locked after manual extension; I elected to perform a gear up landing. With no traffic in the pattern; I selected a grass runway used by gliders adjacent to the paved runway. I cut power only when landing was assured and landed. No injuries occurred. An incident report was filed with tower at XA25. After landing; I noted that I had inadvertently left my wallet with my current pilot and medical certificates in it in my luggage at ZZZ2 with my husband. As a result; I did not have those documents available for the FAA aviation safety inspector when I was interviewed later that day.

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Original NASA ASRS Text

Title: A BE33 EXPERIENCED A TOTAL ELECTRICAL SYS FAILURE. THE PLT ELECTED A GEAR UP LNDG WITHOUT A MANUAL EXTENSION ATTEMPT.

Narrative: ENRTE IN VFR CONDITIONS AND ON A BEACON CODE WITH ATC; OUR PLANE SUFFERED A PRIMARY ELECTRICAL FAILURE WHICH I DISCOVERED BY MY NORMAL SCAN OF THE AMMETER AND ENG ANALYZER (WHICH SHOWS BATTERY OUTPUT IN ITS SCROLL). I ACTIVATED THE STANDBY ALTERNATOR AND DECREASED THE LOAD BY TURNING OFF NON-ESSENTIAL EQUIP. I REVIEWED THE EMER CHKLIST AND ADVISED ATC OF THE ELECTRICAL LOSS. SHORTLY THEREAFTER; THE STANDBY ALTERNATOR FAILED AS WELL. ALL COM WITH ATC WERE LOST. THE ENG CONTINUED TO OPERATE NORMALLY. I BEGAN TO CONSIDER LNDG OPTIONS: I WAS OVER MOUNTAINOUS TERRAIN AND WAS UNFAMILIAR WITH ARPTS IN THE VICINITY. SINCE THE ENG WAS OPERATING NORMALLY AND IT WAS VFR AT MY DEST; I DECIDED TO CONTINUE ON TO ZZZ1 APPROX 15-20 MINS AWAY; WHERE I WAS VERY FAMILIAR WITH THE FIELD. I CONTINUED TO CONSIDER LNDG OPTIONS AND SINCE; WITHOUT PWR; I HAD NO WAY OF CONFIRMING THAT THE GEAR WAS DOWN AND LOCKED AFTER MANUAL EXTENSION; I ELECTED TO PERFORM A GEAR UP LNDG. WITH NO TFC IN THE PATTERN; I SELECTED A GRASS RWY USED BY GLIDERS ADJACENT TO THE PAVED RWY. I CUT PWR ONLY WHEN LNDG WAS ASSURED AND LANDED. NO INJURIES OCCURRED. AN INCIDENT RPT WAS FILED WITH TWR AT XA25. AFTER LNDG; I NOTED THAT I HAD INADVERTENTLY LEFT MY WALLET WITH MY CURRENT PLT AND MEDICAL CERTIFICATES IN IT IN MY LUGGAGE AT ZZZ2 WITH MY HUSBAND. AS A RESULT; I DID NOT HAVE THOSE DOCUMENTS AVAILABLE FOR THE FAA AVIATION SAFETY INSPECTOR WHEN I WAS INTERVIEWED LATER THAT DAY.

Data retrieved from NASA's ASRS site as of January 2009 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.