132 fatal · BOEING B-737-300 · 1994-09-08 · ALIQUIPPA, PA, USA
Event
NTSB number
DCA94MA076
Event ID
20001206X02233
Type
Accident
Date
1994-09-08
Location
ALIQUIPPA, PA, USA
Coordinates
40.610416, -80.250602
Injuries
Highest injury
FATL
Fatal
132
Serious
0
Minor
0
Uninjured
0
Total aboard
132
Aircraft
Make
BOEING
Model
B-737-300
Registration
N513AU
FAR Part
121
Engines
2
Damage
DEST
Conditions
Light
DAYL
Weather
VMC
Probable cause
A loss of control of the airplane resulting from the movement of the rudder surface to its blowdown limit. The rudder surface most likely deflected in a direction opposite to that commanded by the pilots as a result of a jam of the main rudder power control unit servo valve secondary slide to the servo valve housing offset from its neutral position and overtravel of the primary slide.