NMAC.

Narrative

COMING BACK FROM A TRAINING FLT; WE WERE APCHING THE TFC PATTERN FROM THE S-SW AT 1300 FT MSL. WE HEARD AND SAW THE HELI ENTERING AT A 45 DEG ANGLE DOWNWIND. WE ENTERED THE TFC PATTERN ON A FULL DOWNWIND AND ANNOUNCED OUR POS AND INTENTIONS. WE TRIED TO ESTABLISH CONTACT WITH THE HELI -- NO ANSWER. ABOUT 1/4 LENGTH OF THE RWY; THE HELI VEERED ABOUT 45 DEGS OFF TO THE L TOWARDS THE MIDDLE OF THE RWY; AND THEN PARALLELED THE RWY (CTRLINE -- HELI EQUALLED APPROX 200 FT). OBSERVING THE HELI FLT PATH; WE WERE CLOSING UP ON ABOUT THE SAME HEIGHT. BEING ALMOST ABEAM THE NUMBERS; AND BEING WELL CLR OF THE HELI; WE STARTED TO GO THROUGH COCKPIT PROCS TO PREPARE FOR LNDG (CARB HEAT -- PWR BACK -- FLAPS -- AIRSPD). LOOKING BACK TO OBSERVE THE HELI WE SAW THAT THE HELI CHANGED HIS FLT PATH AND WAS NOW FLYING A 45 DEG ANGLE TOWARDS US; CLOSED UP WITHIN APPROX 200 FT AND THEN PARALLELING OUR FLT PATH. BEING AT A LOWER ALT AND TO AVOID A POSSIBLE MIDAIR COLLISION AND TO KEEP VISUAL CONTACT WITH THE HELI; I DECIDE TO EXECUTE A SHORT APCH (PWR IDLE -- FULL FLAPS) TO CLR THE HELI FLT PATH BELOW HIM (APPROX 200 FT) AND SLIGHTLY BEHIND HIM. WE LANDED THE AIRPLANE; ROLLED OUT AND CLRED THE RWY AT THE END AND WAITED FOR HELI TFC OVER THE NUMBERS TO CLR FOR US TO BACK TAXI. AFTER BOTH ACFT HAD BEEN PARKED BOTH ACFT MET FOR A DISCUSSION. HELI STUDENT DID NOT ANSWER RADIO CALL. LOW TIME HELI STUDENT APPROX 25 HRS; 16 YR OLD; SECOND OR THIRD SOLO FLT BACK FROM PRACTICE AREA. A JUDGEMENT AND DECISION HAD TO BE TAKEN VERY FAST TO PREVENT POSSIBLE MIDAIR COLLISION. KNOWING AND UNDERSTANDING FAR 91.113/91.127(B)(2) AND AIM; I BELIEVE THAT; IN THIS OCCURRENCE; SOMETHING HAD TO BE DONE FAST AND BY NOT VIOLATING FAR'S. I CONSIDER THE ACTION TAKE AS A POSSIBLE PREVENTION OF A MIDAIR COLLISION. THIS OCCURRENCE WAS DISCUSSED BY ME AND THE LCL FSDO TO GIVE THE LCL FSDO INSIGHT TO THIS MATTER.