|37000 Feet||Browse and search NASA's
Aviation Safety Reporting System
|Local Time Of Day||1201 To 1800|
|Locale Reference||atc facility : jot|
|Altitude||msl bound lower : 7300|
msl bound upper : 7300
|Controlling Facilities||tracon : ord|
tower : stl
|Operator||common carrier : air carrier|
|Make Model Name||Medium Large Transport, Low Wing, 2 Turbojet Eng|
|Flight Phase||descent other|
|Route In Use||enroute : on vectors|
|Operator||general aviation : personal|
|Make Model Name||Sail Plane|
|Flight Phase||cruise other|
|Affiliation||company : air carrier|
|Function||flight crew : captain|
oversight : pic
|Qualification||pilot : flight engineer|
pilot : atp
|Experience||flight time last 90 days : 225|
flight time total : 9000
flight time type : 5000
|Function||flight crew : single pilot|
|Qualification||pilot : student|
On descent into chicago midway at approximately 5 NM southeast of jot while on a vector heading of 050 degree at 7300' MSL we passed through a group of 3 gliders. We missed the glider on our right by approximately 200' laterally. We passed directly over the other 2 gliders, missed them by 500' vertically. No radar traffic warning was issued. An airlines medium large transport (same route) descending in front of us advised approach of the presence of a light aircraft just south of the jot VOR at 5500' MSL. As we approached jot VOR we spotted this aircraft at 12 O'clock descending. I believe this was the tow plane. Just after spotting this aircraft we ran through the gliders. Evasive action was taken. No injuries. The chicago TRACON supervisor stated the on duty controller did not see the gliders or tow plane on radar.
Original NASA ASRS Text
Title: NMAC BETWEEN ACR MLG AND GLIDERS.
Narrative: ON DESCENT INTO CHICAGO MIDWAY AT APPROX 5 NM SE OF JOT WHILE ON A VECTOR HEADING OF 050 DEG AT 7300' MSL WE PASSED THROUGH A GROUP OF 3 GLIDERS. WE MISSED THE GLIDER ON OUR RIGHT BY APPROX 200' LATERALLY. WE PASSED DIRECTLY OVER THE OTHER 2 GLIDERS, MISSED THEM BY 500' VERTICALLY. NO RADAR TFC WARNING WAS ISSUED. AN AIRLINES MLG (SAME ROUTE) DESCENDING IN FRONT OF US ADVISED APCH OF THE PRESENCE OF A LIGHT ACFT JUST SOUTH OF THE JOT VOR AT 5500' MSL. AS WE APCHED JOT VOR WE SPOTTED THIS ACFT AT 12 O'CLOCK DESCENDING. I BELIEVE THIS WAS THE TOW PLANE. JUST AFTER SPOTTING THIS ACFT WE RAN THROUGH THE GLIDERS. EVASIVE ACTION WAS TAKEN. NO INJURIES. THE CHICAGO TRACON SUPERVISOR STATED THE ON DUTY CTLR DID NOT SEE THE GLIDERS OR TOW PLANE ON RADAR.
Data retrieved from NASA's ASRS site as of August 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.