Narrative:

While conducting multi-engine flight training with one engine shut down; flying eastbound in level flight at 4;500; my student and I received a traffic advisory from oklahoma city approach control referencing a gulfstream to our east; descending to 4;000. The student was practicing simulated instrument conditions with his outside visibility restricted and I was acting as safety pilot watching for traffic. I told the student that with existing visibility and ceilings it might be difficult to see traffic from that direction and instructed him to turn to the west; away from the potential traffic conflict. The gulfstream traffic also received a traffic call referencing our position and after a few moments replied 'seminole in sight.' due to our new westbound heading; traffic arriving into the terminal area from the east would have been obscured by our fuselage and not visible to us. About one minute later the gulfstream appeared on our right approximately 2;000 horizontal feet north of us and descending through our altitude in a 30 degree bank from west to south turning towards our aircraft on what appeared to be a near collision course. The gulfstream then appeared to increase its rate of descent allowing it to pass approximately 400 ft directly under our aircraft as if the gulfstream crew had only seen our aircraft at the last moment. Due to the high speed of the gulfstream and the sudden nature of the incident I did not have time to react before the gulfstream had already passed beneath us. After passing beneath us the gulfstream appeared to continue its descent to perhaps as low as 3;000 ft MSL as it recovered from the high rate of descent required to avoid us. I heard the gulfstream crew advise the controller that they had descended to 3;500 to avoid traffic.it's not clear to me how the situation came to occur. I do not know if the gulfstream was vectored into us or if the gulfstream was providing its own navigation. After the incident I asked the approach controller 'oke city approach; [call sign] I thought that gulfstream said they had us in sight' and the gulfstream crew replied 'guess we got a real good look at you'. I understood the statement to mean they also thought we had gotten close. If the controller had advised the gulfstream to stop above us or issued the gulfstream a vector to avoid us the potential hazard would have been avoided. Also; the gulfstream crew presumably lost visual contact with us and had they notified the controller of that fact he could have responded appropriately.

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Original NASA ASRS Text

Title: PA44 instructor and student report a NMAC with a Gulfsteam jet near OKC at 4;500 FT; while practicing engine out maneuvers. The southbound Gulfsteam traffic is reported at 12 o'clock by ATC and the PA44 pilots elect to make a 180 degree turn from east to a westerly heading. One minute later the Gulfsteam is sighted diving below the PA44 from right to left.

Narrative: While conducting multi-engine flight training with one engine shut down; flying eastbound in level flight at 4;500; my student and I received a traffic advisory from Oklahoma City Approach Control referencing a Gulfstream to our east; descending to 4;000. The student was practicing simulated instrument conditions with his outside visibility restricted and I was acting as safety pilot watching for traffic. I told the student that with existing visibility and ceilings it might be difficult to see traffic from that direction and instructed him to turn to the west; away from the potential traffic conflict. The Gulfstream traffic also received a traffic call referencing our position and after a few moments replied 'Seminole in sight.' Due to our new westbound heading; traffic arriving into the terminal area from the east would have been obscured by our fuselage and not visible to us. About one minute later The Gulfstream appeared on our right approximately 2;000 horizontal feet north of us and descending through our altitude in a 30 degree bank from west to south turning towards our aircraft on what appeared to be a near collision course. The Gulfstream then appeared to increase its rate of descent allowing it to pass approximately 400 FT directly under our aircraft as if the Gulfstream crew had only seen our aircraft at the last moment. Due to the high speed of the Gulfstream and the sudden nature of the incident I did not have time to react before the Gulfstream had already passed beneath us. After passing beneath us the Gulfstream appeared to continue its descent to perhaps as low as 3;000 FT MSL as it recovered from the high rate of descent required to avoid us. I heard the Gulfstream crew advise the controller that they had descended to 3;500 to avoid traffic.It's not clear to me how the situation came to occur. I do not know if the Gulfstream was vectored into us or if the Gulfstream was providing its own navigation. After the incident I asked the Approach Controller 'Oke City Approach; [call sign] I thought that Gulfstream said they had us in sight' and the Gulfstream crew replied 'Guess we got a real good look at you'. I understood the statement to mean they also thought we had gotten close. If the controller had advised the Gulfstream to stop above us or issued the Gulfstream a vector to avoid us the potential hazard would have been avoided. Also; the Gulfstream crew presumably lost visual contact with us and had they notified the controller of that fact he could have responded appropriately.

Data retrieved from NASA's ASRS site as of July 2013 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.