Narrative:Control was lost during a 3-engine missed ILS approach procedure and the aircraft crashed.
|Date:||Wednesday 31 March 1971|
|Operator:||Western Air Lines|
|C/n / msn:|| 19439/621|
|First flight:|| 1966|
|Total airframe hrs:||11521|
|Engines:|| 4 Pratt & Whitney JT3D-3B|
|Crew:||Fatalities: 5 / Occupants: 5|
|Passengers:||Fatalities: 0 / Occupants: 0|
|Total:||Fatalities: 5 / Occupants: 5 |
|Airplane damage:|| Damaged beyond repair|
|Airplane fate:|| Written off (damaged beyond repair)|
|Location:||Ontario International Airport, CA (ONT) (United States of America)
|Phase:|| Approach (APR)|
|Departure airport:||Los Angeles International Airport, CA (LAX/KLAX), United States of America|
|Destination airport:||Ontario International Airport, CA (ONT/KONT), United States of America|
Failure of the aircraft rudder hydraulic actuator support fitting led to the loss of left rudder control. The loss of control situation was worsened by the degraded external visual clues (600 feet overcast; 1200m visibility in fog haze and smoke).
PROBABLE CAUSE: "The failure of the aircraft rudder hydraulic actuator support fitting. The failure of the fitting resulted in the inapparent loss of left rudder control which, under the conditions of the flight, precluded the pilots’ ability to maintain directional control during a simulated engine-out missed-approach. The existing weather conditions degraded external visual cues, thereby hampering rapid assessment of aircraft performance by the flight check captain."
Official accident investigation report
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 Los Angeles International Airport, CA to Ontario International Airport, CA as the crow flies is 75 km (47 miles).