Summary
On September 12, 1989, a Mcdonnell Douglas MD-80 (N244AA) was involved in an accident near Chicago, IL. The accident resulted in 2 minor injuries, with 108 people uninjured out of 110 aboard. The aircraft sustained substantial damage.
The National Transportation Safety Board determined the probable cause of this accident to be: A LOSS OF HYDRAULIC SYSTEM PRESSURE DUE TO THE OPERATOR'S FAILURE TO REPLACE A SYSTEM COMPONENT THAT HAD A KNOWN HISTORY OF FAILURES, AND THE PILOT'S IMPROPER USE POWERPLANT CONTROLS RESULTING IN A DEGRADATION OF RUDDER EFFECTIVENESS. A CONTRIBUTING FACTOR WAS THE FAILURE OF THE POWER TRANSFER UNIT SHUTOFF VALVE.
This accident is documented in NTSB report CHI89FA183. AviatorDB cross-references NTSB investigation data with FAA registry records to provide comprehensive safety information for aircraft N244AA.
Accident Details
Probable Cause and Findings
A LOSS OF HYDRAULIC SYSTEM PRESSURE DUE TO THE OPERATOR'S FAILURE TO REPLACE A SYSTEM COMPONENT THAT HAD A KNOWN HISTORY OF FAILURES, AND THE PILOT'S IMPROPER USE POWERPLANT CONTROLS RESULTING IN A DEGRADATION OF RUDDER EFFECTIVENESS. A CONTRIBUTING FACTOR WAS THE FAILURE OF THE POWER TRANSFER UNIT SHUTOFF VALVE.
Aircraft Information
Registered Owner (Historical)
Data Source
Data provided by the National Transportation Safety Board (NTSB). For more information on this event, visit the NTSB Records Search website. NTSB# CHI89FA183