ASN Aircraft accident Learjet 23 N959SC Detroit City Airport, MI (DET)
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Status:Accident investigation report completed and information captured
Date:Monday 22 July 1991
Type:Silhouette image of generic LJ23 model; specific model in this crash may look slightly different
Learjet 23
Operator:Jetstream Inc.
Registration: N959SC
MSN: 23-045A
First flight: 1965
Engines: 2 General Electric CJ610-4
Crew:Fatalities: 2 / Occupants: 2
Passengers:Fatalities: 1 / Occupants: 1
Total:Fatalities: 3 / Occupants: 3
Aircraft damage: Destroyed
Aircraft fate: Written off (damaged beyond repair)
Location:Detroit City Airport, MI (DET) (   United States of America)
Phase: Initial climb (ICL)
Departure airport:Detroit City Airport, MI (DET/KDET), United States of America
Destination airport:Chicago-Midway Airport, IL (MDW/KMDW), United States of America
Parking brake not released prior to takeoff. The plane remained low and slow after liftoff, then banked (rocked) left & right in nose high attitude, settled, hit trees and crashed about 200 feet beyond the runway. The aircraft was about 430 lb (195 kg) overweight.

Probable Cause:

PROBABLE CAUSE: "Improper preflight by the pilot, his failure to abort the takeoff while there was sufficient runway remaining, and his failure to assure that the aircraft attained sufficient airspeed for lift-off and climb. Factors related to the accident were: the pilot's failure to assure the aircraft was within its maximum weight limitation, his improper use of the parking brake, and insufficient information in the pilot operating handbook concerning the aircraft parking brake."

Accident investigation:

Investigating agency: NTSB
Status: Investigation completed
Duration: 1 year and 2 months
Accident number: CHI91MA224
Download report: Summary report

Brake problem
Loss of control



photo of Learjet-23-F-BSUX
accident date: 22-07-1991
type: Learjet 23
registration: F-BSUX

This map shows the airport of departure and the intended destination of the flight. The line between the airports does not display the exact flight path.
Distance from Detroit City Airport, MI to Chicago-Midway Airport, IL as the crow flies is 395 km (247 miles).

This information is not presented as the Flight Safety Foundation or the Aviation Safety Network’s opinion as to the cause of the accident. It is preliminary and is based on the facts as they are known at this time.
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