ISTR WITH STUDENT HIT DEER ON RWY AT NIGHT.

Narrative

I WAS ACTING IN MY CFI CAPACITY COMPLETING THE CHKOUT OF A COMMERCIAL CANDIDATE STUDENT OF MINE IN AN SMA. HE WAS ALREADY COMPETENT IN THE ACFT IN MY OPINION; BUT WE NEEDED 1/4 HRS MORE TO MEET THE FBO'S INSURANCE REQUIREMENTS IN MAKE AND MODEL. I WAS ALSO USING THE OPPORTUNITY TO COMPLETE THE STUDENT'S BIENNIAL FLT REVIEW. WE DEPARTED ISP FOR E HAMPTON ARPT FOR SOME VOR TRACKING AND NIGHT TKOF AND LNDGS. IT WAS DARK AT TKOF AND VISIBILITY WAS ABOVE 8 MI AND THE CEILING WAS ABOVE 10000 FT. SURFACE WINDS WERE WESTERLY AT APPROX 10 KTS. AT MY DIRECTION; WE ENTERED A L DOWNWIND FOR RWY 28 AT HTO AND FLEW A NORMAL TFC PATTERN. BOTH LNDG AND TAXIING LIGHTS WERE ON FOR THE ENTIRE LNDG PHASE. THE STUDENT ACCOMPLISHED A SATISFACTORY LNDG TOUCHING DOWN ON THE NUMBERS OF RWY 28 AND WE WERE DECELERATING WHEN 3 DEER WERE SUDDENLY OBSERVED WALKING FROM R TO L ACROSS THE RWY. I QUICKLY DETERMINED THAT THERE WAS INSUFFICIENT RWY SPACE AND AIRSPD TO SAFELY APPLY FULL PWR AND TKOF OVER THE DEER; SO I FULLY RETARDED THE PWR; BRAKED AS MUCH AS POSSIBLE WITHOUT LOSING CTL AND TURNED TO THE R. THIS ACTION RESULTED IN OUR MISSING 2 OF THE DEER AND APPARENTLY CLIPPING ONLY THE END OF THE LAST OF THE 3. I TAXIED UP TO THE FBO (CLOSED AT NIGHT) TO EXAMINE THE ACFT IN THE FLOOD LIGHTS THAT WERE ON. A THOROUGH WALK AROUND SHOWED ONLY A SLIGHT DENT IN THE LOWER L ENG COWLING AND A LITTLE BLOOD ON THE OUTER 1/5 INCHES ON ONE PROP BLADE. I RAN THE ACFT UP TWICE AND EXERCISED THE GOVERNOR FULLY AND REEXAMINED THE ACFT. THERE WERE NO PROP NICKS; LOOSENESS OR OIL LEAKS; NOR WAS THERE ANY UNUSUAL ENG VIBRATION. THE COWL FLAPS WERE ALSO FULLY OPERATIONAL IN THE GND CHK. I WAS SATISFIED THAT THE ACFT WAS AIRWORTHY FOR THE SHORT TRIP BACK TO ISLIP; SO I TELEPHONED OUR FBO AND NOTIFIED THEM OF THE SITUATION AND THAT WE WOULD BE RETURNING. HOWEVER; I WAS GREATLY CONCERNED ABOUT THE DEER CARCASS LAYING ON THE RWY AND THE POSSIBILITY OF ANOTHER ACFT COMING IN ON 28 AND HAVING AN INCIDENT. AS THE ARPT WAS DESERTED; I CALLED FLT SVC ON A PUBLIC PHONE AND NOTIFIED THEM TO SEE IF A NOTAM COULD BE ISSUED OR IF THEY COULD HELP. THEY WERE VERY HELPFUL AND CONTACTED THE LCL POLICE TO REMOVE THE CARCASS. I ALSO SAID I WOULD CALL THEM TO FILE AN INCIDENT RPT WHEN I ARRIVED BACK AT ISLIP. WE THEN TOOK OFF WITHOUT INCIDENT AND THE ACFT PERFORMED IN A SATISFACTORY MANNER ON THE RETURN FLT WITH NO UNUSUAL FLT OR ENG CHARACTERISTICS NOTICED. NEW YORK APCH ON 132.25 ADVISED THAT THE POLICE WERE ALREADY REMOVING THE DEER SO I WAS RELIEVED THAT THE RWY WAS NO LONGER A POTENTIAL THREAT TO OTHER ACFT. UPON ARRIVING BACK AT THE FBO AT ISLIP; I CONTACTED THE FLT SVC WATCH OFFICER AND FILED A PRELIMINARY INCIDENT RPT. THE NEXT DAY; THE INSPECTOR FROM OUR LCL FSDO CONTACTED ME FOR ADDITIONAL INFO. I BELIEVE I ACTED QUICKLY AND PRUDENTLY TO MAKE A POTENTIALLY LIFE THREATENING SITUATION MUCH LESS SO; WITH RELATIVELY MINOR DAMAGE TO THE ACFT AND NONE AT ALL TO THE OCCUPANTS. I ALSO BELIEVE THAT I EXERCISED MY BEST JUDGEMENT IN DETERMINING THAT THE ACFT DID NOT SUSTAIN ANY DAMAGE THAT WOULD MAKE IT UNSAFE OR UNAIRWORTHY FOR THE RETURN FLT TO ISLIP. I EVEN LEFT THE GEAR DOWN DURING THE FLT TO ELIMINATE ONE ADDITIONAL POTENTIAL PROBLEM.