Serious incident Dornier 228-202 N263MC, Sunday 9 July 1989

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Date:	Sunday 9 July 1989
Time:	17:05 LT
Type:	Dornier 228-202
Owner/operator:	Midway Airlines
Registration:	N263MC
MSN:	8141
Engine model:	GARRETT TPE 331-5
Fatalities:	Fatalities: 0 / Occupants: 16
Other fatalities:	0
Aircraft damage:	None
Category:	Serious incident
Location:	Chicago, IL - United States of America
Phase:	Unknown
Nature:	Unknown
Departure airport:	Madison, WI (KMSN)
Destination airport:
Investigating agency:	NTSB
Confidence Rating:	Accident investigation report completed and information captured

Narrative:
A NEAR MIDAIR COLLISION OCCURRED AT 5000 FEET MSL IN UNCONTROLLED AIRSPACE, BUT WITHIN THE 30 MILE VEIL OF O'HARE, WHERE A MODE C TRANSPONDER WAS REQUIRED. SEPARATION WAS ABOUT 200 FEET HORIZONTAL AND 100 FEET VERTICAL. THE CREW OF A COMMUTER MADE A STEEP 45 DEGREE BANK AND A NOSE DOWN MANEUVER OF ABOUT 15 DEGREES TO AVOID THE TWIN ENGINE BEECH BARON. O'HARE APPROACH HAD ISSUED TRAFFIC TO THE MIDWAY COMMUTER.

Probable Cause: POOR LOOKOUT BY THE CREW OF THE DORNIER AND THE BARON.

Accident investigation: