Narrative:

My crew and I were returning back to home base after dropping off a patient at a hospital. About 5 NM north of ZZZ at 1700 ft MSL, I looked up from the instrument panel and saw a red and white high wing tail dragger airplane at around 100 ft in front of me headed in the opposite direction. I climbed and turned hard right avoiding the aircraft. I think the aircraft may have come within 50 ft of us. I don't believe he saw us since I didn't see him take any evasive action. Before the incident, I made a position report on CTAF at about 5 NM north. I had both red anti-collision and white strobe lights turned on. I also had my landing light on. I never heard any radio calls on the CTAF. I had glanced down at the instrument panel to see if my GPS had captured on my desired course, when I looked back up, I saw the aircraft. I was scanning outside for traffic during takeoff, climb, and cruise, but somehow I didn't see this aircraft till it was almost too late. I will attempt to be even more vigilant in the future. It is possible that this converging aircraft was behind the windscreen center pillar while I was looking outside. When I looked back up from the panel he was almost upon us. In the future I'll move my head around more in an attempt to eliminate any blind spots.

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Original NASA ASRS Text

Title: AN EMS ACFT AND A GA HIGH WING TAIL DRAGGER HAD AN NMAC IN ZZZ UNITED STATES CLASS G.

Narrative: MY CREW AND I WERE RETURNING BACK TO HOME BASE AFTER DROPPING OFF A PATIENT AT A HOSPITAL. ABOUT 5 NM N OF ZZZ AT 1700 FT MSL, I LOOKED UP FROM THE INST PANEL AND SAW A RED AND WHITE HIGH WING TAIL DRAGGER AIRPLANE AT AROUND 100 FT IN FRONT OF ME HEADED IN THE OPPOSITE DIRECTION. I CLBED AND TURNED HARD R AVOIDING THE ACFT. I THINK THE ACFT MAY HAVE COME WITHIN 50 FT OF US. I DON'T BELIEVE HE SAW US SINCE I DIDN'T SEE HIM TAKE ANY EVASIVE ACTION. BEFORE THE INCIDENT, I MADE A POS RPT ON CTAF AT ABOUT 5 NM N. I HAD BOTH RED ANTI-COLLISION AND WHITE STROBE LIGHTS TURNED ON. I ALSO HAD MY LNDG LIGHT ON. I NEVER HEARD ANY RADIO CALLS ON THE CTAF. I HAD GLANCED DOWN AT THE INST PANEL TO SEE IF MY GPS HAD CAPTURED ON MY DESIRED COURSE, WHEN I LOOKED BACK UP, I SAW THE ACFT. I WAS SCANNING OUTSIDE FOR TFC DURING TKOF, CLB, AND CRUISE, BUT SOMEHOW I DIDN'T SEE THIS ACFT TILL IT WAS ALMOST TOO LATE. I WILL ATTEMPT TO BE EVEN MORE VIGILANT IN THE FUTURE. IT IS POSSIBLE THAT THIS CONVERGING ACFT WAS BEHIND THE WINDSCREEN CTR PILLAR WHILE I WAS LOOKING OUTSIDE. WHEN I LOOKED BACK UP FROM THE PANEL HE WAS ALMOST UPON US. IN THE FUTURE I'LL MOVE MY HEAD AROUND MORE IN AN ATTEMPT TO ELIMINATE ANY BLIND SPOTS.

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.