Narrative:

I climbed after takeoff to an altitude of 2600 ft which was 600 ft above my assigned altitude of 2000 ft. It resulted in a setting off the TCASII on a commercial jet. I was not aware of the TCASII warning at the time. There were many contributing factors. The first was my decision to take off during the morning rush hour. I became aware of the rush hour after I had already gotten in line with all of the other planes. Another factor was the active runway. It had a slight tailwind. This meant that while taxiing we had a slight headwind which blew jet exhaust at my plane. I endured strong jet exhaust for 15-20 mins during taxiing. The exhaust made me nauseous, but I kept telling myself that fresh air after takeoff would fix the problem. (My mistake.) upon takeoff, I found myself struggling to keep from vomiting. My assigned altitude was clearly written on my lap tablet. At the time I was unaware that I had been effected by the carbon monoxide. I became aware of my altitude violation only after ATC asked me to 'say altitude.' I then immediately descended to 2000 ft. I finished my 80 mi flight to college station, tx. The nausea cleared up in about 4 hours. I had a headache all day. All of these contributing factors were within my control.

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Original NASA ASRS Text

Title: NMAC BTWN A DEP C150 WHO OVERSHOT HIS ALT AND A DEP ACR 3 NM SW OF IAH, TX.

Narrative: I CLBED AFTER TKOF TO AN ALT OF 2600 FT WHICH WAS 600 FT ABOVE MY ASSIGNED ALT OF 2000 FT. IT RESULTED IN A SETTING OFF THE TCASII ON A COMMERCIAL JET. I WAS NOT AWARE OF THE TCASII WARNING AT THE TIME. THERE WERE MANY CONTRIBUTING FACTORS. THE FIRST WAS MY DECISION TO TAKE OFF DURING THE MORNING RUSH HR. I BECAME AWARE OF THE RUSH HR AFTER I HAD ALREADY GOTTEN IN LINE WITH ALL OF THE OTHER PLANES. ANOTHER FACTOR WAS THE ACTIVE RWY. IT HAD A SLIGHT TAILWIND. THIS MEANT THAT WHILE TAXIING WE HAD A SLIGHT HEADWIND WHICH BLEW JET EXHAUST AT MY PLANE. I ENDURED STRONG JET EXHAUST FOR 15-20 MINS DURING TAXIING. THE EXHAUST MADE ME NAUSEOUS, BUT I KEPT TELLING MYSELF THAT FRESH AIR AFTER TKOF WOULD FIX THE PROB. (MY MISTAKE.) UPON TKOF, I FOUND MYSELF STRUGGLING TO KEEP FROM VOMITING. MY ASSIGNED ALT WAS CLRLY WRITTEN ON MY LAP TABLET. AT THE TIME I WAS UNAWARE THAT I HAD BEEN EFFECTED BY THE CARBON MONOXIDE. I BECAME AWARE OF MY ALT VIOLATION ONLY AFTER ATC ASKED ME TO 'SAY ALT.' I THEN IMMEDIATELY DSNDED TO 2000 FT. I FINISHED MY 80 MI FLT TO COLLEGE STATION, TX. THE NAUSEA CLRED UP IN ABOUT 4 HRS. I HAD A HEADACHE ALL DAY. ALL OF THESE CONTRIBUTING FACTORS WERE WITHIN MY CTL.

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.