Close proximity air carrier-medium large transport GA-small aircraft 1 NM east of cgx.

Attributes
ACN	188024
Time
Date	199109
Day	Mon
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : cgx airport : mdw
State Reference	IL
Altitude	msl bound lower : 3000 msl bound upper : 3000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : ord
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	climbout : intermediate altitude cruise other
Route In Use	enroute : on vectors
Flight Plan	IFR
Aircraft 2
Make Model Name	Small Aircraft, High Wing, 1 Eng, Fixed Gear
Flight Phase	cruise other
Flight Plan	VFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 150 flight time total : 2800 flight time type : 1000
ASRS Report	188024
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 130 flight time total : 12000 flight time type : 9800
ASRS Report	187611
Events
Anomaly	conflict : nmac
Independent Detector	other controllera other flight crewa
Resolutory Action	none taken : insufficient time
Consequence	Other
Miss Distance	horizontal : 0 vertical : 200
Supplementary
Primary Problem	Flight Crew Human Performance

Narrative:

Near miss with light single engine aircraft. Other aircraft passed within 200 ft vertically (according to ATC altitude readout) and directly underneath our aircraft. The captain spotted aircraft at the same time ATC was calling traffic at 2 O'clock and less than a mi. Our aircraft was being flown on autoplt and there was no time to take any evasive action. Our aircraft was not TCASII equipped but believe we would have been alerted to the traffic sooner if we had TCASII.

Original NASA ASRS Text

Title: CLOSE PROX ACR-MLG GA-SMA 1 NM E OF CGX.

Narrative: NEAR MISS WITH LIGHT SINGLE ENG ACFT. OTHER ACFT PASSED WITHIN 200 FT VERTICALLY (ACCORDING TO ATC ALT READOUT) AND DIRECTLY UNDERNEATH OUR ACFT. THE CAPT SPOTTED ACFT AT THE SAME TIME ATC WAS CALLING TFC AT 2 O'CLOCK AND LESS THAN A MI. OUR ACFT WAS BEING FLOWN ON AUTOPLT AND THERE WAS NO TIME TO TAKE ANY EVASIVE ACTION. OUR ACFT WAS NOT TCASII EQUIPPED BUT BELIEVE WE WOULD HAVE BEEN ALERTED TO THE TFC SOONER IF WE HAD TCASII.

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.