MINR · McDonnell Douglas MD-80 · 1989-09-12 · CHICAGO, IL, USA
Event
NTSB number
CHI89FA183
Event ID
20001213X29315
Type
Accident
Date
1989-09-12
Location
CHICAGO, IL, USA
Injuries
Highest injury
MINR
Fatal
0
Serious
0
Minor
2
Uninjured
108
Total aboard
110
Aircraft
Make
McDonnell Douglas
Model
MD-80
Registration
N244AA
FAR Part
121
Engines
2
Damage
SUBS
Conditions
Light
NDRK
Weather
VMC
Probable cause
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.