AN SMA PLT LANDED ON A FREEWAY WITH AN UNRESPONSIVE ENG.

Narrative

NO PROBS OF SIGNIFICANCE WERE FOUND ON THE FIRST 3 TOUCH- AND-GOES. ON THE LAST ONE; STUDENT DRIFTED AWAY FROM THE RWY ON DOWNWIND LEG. AT THE POINT OF TURNING BASE LEG; WE WERE TOO FAR OUT AND AT TOO LOW OF AN ALT. IN ORDER TO BRING US BACK ON THE CORRECT ALT STUDENT ADDED TOO MUCH PWR SO AT THE POINT OF TURNING TO FINAL; ALT WAS CLOSE TO TFC PATTERN ALT (1900 FT MSL). CARB HEAT WAS TURNED ON; FULL FLAPS WERE USED AND PWR WAS SET TO IDLE; SO OUR FINAL APCH TURNED IN TO BE A GLIDE. AFTER TOUCHING THE RWY AT ABOUT MIDPOINT; FLAPS WERE RETRACTED; CARB HEAT WAS SHUT OFF AND PWR WAS ADDED. AFTER CLBING ABOUT 200- 250 FT; THE ENG SPUTTERED ONCE OR TWICE AND PWR WAS LOST. MY FIRST REACTION WAS PUSHING MY L HAND OVER THE STUDENT'S R HAND ON THE THROTTLE; IN ORDER TO REASSURE WE HAD FULL PWR. WHAT TURNED OUT TO BE WE HAD THE THROTTLE TO A FULL PWR POS. THEN; COMPLETE PWR WAS LOST AND I TURNED THE SMA INTO A STEEP L TURN IN ORDER TO ATTEMPT A LNDG ON RWY 4. WHILE PERFORMING THAT TURN; I WAS CONVINCED I HAD SUFFICIENT ALT AND WAS CLOSE ENOUGH TO RWY 4 TO MAKE THIS A SUCCESSFUL LNDG. HOWEVER; AT MY APPROX 135 POINT; IT APPEARED TO BE IMPOSSIBLE TO CLR THE TREES AT THE APCH END OF RWY 4. THE ONLY 'SUITABLE' LNDG SPOT AT THAT TIME SEEMED TO BE INTERSTATE 79; WHICH ELEVATION IS LOWER THAN 4G7. BECAUSE OF LOW ALT; NO RESTART ATTEMPTS WERE MADE. LNDG WAS MADE WITH THE TFC FLOW IN THE NBOUND LANE OF INTERSTATE 79 WHERE A GUARDRAIL WAS HIT WITH; I BELIEVE; THE R HORIZ STABILIZER IN ORDER TO AVOID TFC. THE SMA SPUN AROUND AND CAME TO A STOP AFTER ABOUT 100 FT AT APPROX PM05 EST. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING: THE RPTR STATES THAT THE LCL FAA OFFICE DRAINED ALL OF HIS FUEL WHEN IT FOUND THAT HE WAS USING AUTO FUEL UNDER THE APPROPRIATE STC. THE RPTR HAS NOT HEARD BACK FROM THE FAA ABOUT THIS. THE FAA SUSPECTS CARB ICE CAUSED THE FAILURE. THE ACFT LOST ITS L WING AND STRUT; THE PROP WAS DAMAGED; AND THE R TAILPLANE WAS DAMAGED. THERE WERE NO INJURIES TO THE CREW OR PASSING AUTOS. MOST OF THE DAMAGE HAPPENED WHEN THE RPTR MANEUVERED TO AVOID AN AUTO ON THE FREEWAY.