Narrative:

I was inbound to evm on an IFR plan, nearing the airport I saw areas of ground fog, mostly east of the airport. I flew the RNAV 27 approach, saw portions of runway, but was not in a position from which landing was practical. I circled west of airport in good VFR, saw runway 9, PAPI, VOR, etc, though some areas still obscured by the fog, I approached runway 9 visually, a fog patch drifted over the west end of the runway, I sidestepped over and around the fog, decided enough runway remained and landed about 2000 ft (?) from threshold. Braking action seemed fair to poor (wet runway) and I did not realize this until too little runway remained. Maximum braking and reverse finally stopped plane with gear just into overrun, no damage to aircraft, passenger or ground equipment. My judgement failures: 1) misjudge runway condition, remaining, needed. 2) should have abandoned approach when fog drifted in. 3) should have gone around as soon as braking condition recognized. 4) best: should have gone elsewhere while fog burned off.

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Original NASA ASRS Text

Title: AN SMA NEARLY RAN OFF THE END OF A SHORT, WET RWY IN MARGINAL VMC.

Narrative: I WAS INBOUND TO EVM ON AN IFR PLAN, NEARING THE ARPT I SAW AREAS OF GND FOG, MOSTLY E OF THE ARPT. I FLEW THE RNAV 27 APCH, SAW PORTIONS OF RWY, BUT WAS NOT IN A POS FROM WHICH LNDG WAS PRACTICAL. I CIRCLED W OF ARPT IN GOOD VFR, SAW RWY 9, PAPI, VOR, ETC, THOUGH SOME AREAS STILL OBSCURED BY THE FOG, I APCHED RWY 9 VISUALLY, A FOG PATCH DRIFTED OVER THE W END OF THE RWY, I SIDESTEPPED OVER AND AROUND THE FOG, DECIDED ENOUGH RWY REMAINED AND LANDED ABOUT 2000 FT (?) FROM THRESHOLD. BRAKING ACTION SEEMED FAIR TO POOR (WET RWY) AND I DID NOT REALIZE THIS UNTIL TOO LITTLE RWY REMAINED. MAX BRAKING AND REVERSE FINALLY STOPPED PLANE WITH GEAR JUST INTO OVERRUN, NO DAMAGE TO ACFT, PAX OR GND EQUIP. MY JUDGEMENT FAILURES: 1) MISJUDGE RWY CONDITION, REMAINING, NEEDED. 2) SHOULD HAVE ABANDONED APCH WHEN FOG DRIFTED IN. 3) SHOULD HAVE GONE AROUND AS SOON AS BRAKING CONDITION RECOGNIZED. 4) BEST: SHOULD HAVE GONE ELSEWHERE WHILE FOG BURNED OFF.

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.