Narrative:

I performed on line weather check; preflighted; boarded and started engine per checklist. Clicked three times on unicom/ASOS and heard and set altimeter setting and 'winds 090 at 8 KTS;' favoring runway 10. Taxied to runway 10; performed run-up; observed and heard no other traffic or calls during taxi and run-up and announced on unicom 'taking runway 10 for departure.' taxied onto runway 10 and started takeoff roll. Coming through approximately 50 KTS I observed what appeared to be landing lights coming opposite direction on the runway. The opposite end of the runway was not visible and the lights were at pavement level and rising a bit. Immediately; I rejected the takeoff and initiated heavy braking. While braking I verified there was indeed another aircraft on the roll; opposite direction on runway 28. I veered to the extreme right edge of the runway and considered veering off the runway to avoid collision if necessary. I observed the opposing aircraft rotate and lift off. The aircraft was a business jet. I estimate the aircraft was 75 to 100 ft overhead when it passed over. I made a radio call asking the jet if it was normal for him to takeoff downwind with no radio calls. There was no response. I re-entered the runway; made a radio call and departed with a left crosswind departure. I observed the jet to the south of the airport and turning toward the east and then heard the pilot call to enter the pattern. I clicked three times on the unicom/ASOS frequency and the automated voice said; 'wind 090 at 9 KTS...favoring runway 10.' I repeated the same on the unicom that winds were favoring 10 not 28. The jet then stated 'ah; ah; well we have an emergency and are using runway 3.' there is no runway 3 at santa theresa. It seemed they knew they took off downwind; causing a possible tragedy; and would say anything to protect themselves. The entire near miss could have been avoided if the jet's pilot used the unicom and took-off into the wind as proper.

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Original NASA ASRS Text

Title: The pilot of a light single engine aircraft aborted his takeoff from Runway 10 at 5T6 when a business jet took off opposite direction without making position and intention calls on CTAF.

Narrative: I performed on line weather check; preflighted; boarded and started engine per checklist. Clicked three times on UNICOM/ASOS and heard and set altimeter setting and 'winds 090 at 8 KTS;' favoring Runway 10. Taxied to Runway 10; performed run-up; observed and heard no other traffic or calls during taxi and run-up and announced on UNICOM 'taking Runway 10 for departure.' Taxied onto Runway 10 and started takeoff roll. Coming through approximately 50 KTS I observed what appeared to be landing lights coming opposite direction on the runway. The opposite end of the runway was not visible and the lights were at pavement level and rising a bit. Immediately; I rejected the takeoff and initiated heavy braking. While braking I verified there was indeed another aircraft on the roll; opposite direction on Runway 28. I veered to the extreme right edge of the runway and considered veering off the runway to avoid collision if necessary. I observed the opposing aircraft rotate and lift off. The aircraft was a business jet. I estimate the aircraft was 75 to 100 FT overhead when it passed over. I made a radio call asking the jet if it was normal for him to takeoff downwind with no radio calls. There was no response. I re-entered the runway; made a radio call and departed with a left crosswind departure. I observed the jet to the south of the airport and turning toward the east and then heard the pilot call to enter the pattern. I clicked three times on the UNICOM/ASOS frequency and the automated voice said; 'wind 090 at 9 KTS...favoring Runway 10.' I repeated the same on the UNICOM that winds were favoring 10 not 28. The jet then stated 'ah; ah; well we have an emergency and are using Runway 3.' There is no Runway 3 at Santa Theresa. It seemed they knew they took off downwind; causing a possible tragedy; and would say anything to protect themselves. The entire near miss could have been avoided if the jet's pilot used the UNICOM and took-off into the wind as proper.

Data retrieved from NASA's ASRS site as of April 2012 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.