CHI89IA144

NTSB incident investigation · Dornier DO-228 · Chicago, IL · July 9, 1989

Incident · No injuriesIncident investigationFinal report
Date
July 9, 1989, 16:05 local (21:05 UTC)
Place
Chicago, IL
Injuries
16 uninjured
Damage
No damage
Phase of flight
Enroute
Aircraft
N263MCDornier DO-228
Weather
Visual (VMC) · Day
Status
Completed · report August 26, 1992
Report
Approved by Office Director
Case key
14287

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the incident.

On this page

Probable cause

Poor lookout by the crew of the dornier and the baron.

Sequence of events

NTSB’s coding before 2008: each occurrence and phase of flight, and the causes and factors under it. The codes are defined in NTSB’s coding manual.

Near collision between aircraftDescent
Visual lookout - inadequatePilot in commandCause
Visual lookout - inadequatePilot of other aircraftCause

Analysis

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.

Aircraft

Registration
N263MC
Reported as
Dornier DO-228
Category
Airplane
Engine
Garrett TPE 331-5, 715 horsepower, turbo prop
Damage
No damage
Flight
Part 135
Registered owner
Midway Airlines
Airworthiness certificate
Standard, Transport
Departed
MSN · Madison, WI
Flight plan
IFR

Matched to the registry by N-number and the event date; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.

Flight crew

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Certificate
Airline transport
Airplane ratings
Multi-engine land, Single-engine land
Instrument ratings
Airplane
Medical
Class 1, Valid Medical--no waivers/lim.
Seat
Left

Weather

Conditions
Visual (VMC) · Day
Wind
220° at 11 knots
Visibility
6 statute miles
Lowest ceiling
5,000 ft broken
Temperature
95 °F, dew point 72 °F
Altimeter
29.00 inHg
Observed at
DPA, 20 nm away