United Airlines Flight 232

United Airlines Flight 232
FAA · Public domain · source
Occurrence type	Accident
Caption	A United Airlines McDonnell Douglas DC-10 similar to the one involved in the accident
Date	July 19, 1989
Site	Sioux Gateway Airport, Sioux City, Iowa, Iowa, United States
Passengers	285
Crew	11
Injuries	172
Fatalities	111
Survivors	185
Aircraft type	McDonnell Douglas DC-10
Operator	United Airlines
Registration	N1819U
Origin	Stapleton International Airport, Denver, Colorado
Destination	Philadelphia International Airport, Philadelphia, Pennsylvania
Stopover	Chicago O'Hare International Airport, Chicago, Illinois

United Airlines Flight 232 was a scheduled United Airlines McDonnell Douglas DC-10 aircraft that suffered a catastrophic failure of its tail section during flight, leading to a loss of hydraulic systems and subsequent crash at Sioux Gateway Airport in Sioux City, Iowa. The accident occurred on July 19, 1989, while the aircraft was en route from Stapleton International Airport in Denver, Colorado to Philadelphia International Airport in Philadelphia, Pennsylvania, with a scheduled stopover at Chicago O'Hare International Airport in Chicago, Illinois. The crew, led by Captain Alfred C. Haynes, a veteran pilot with United Airlines, included First Officer William Records and Flight Engineer Dudley Dvorak, who all played crucial roles in attempting to save the aircraft. The accident was also investigated by the National Transportation Safety Board (NTSB), with assistance from the Federal Aviation Administration (FAA), McDonnell Douglas, and General Electric, the manufacturer of the CF6 engine.

Introduction

The McDonnell Douglas DC-10 was a widely used wide-body aircraft in the 1980s, with United Airlines operating a large fleet of the type. The aircraft involved in the accident, registered as N1819U, was a DC-10-10 variant, powered by three General Electric CF6 turbofan engines. On the day of the accident, the aircraft departed from Stapleton International Airport in Denver, Colorado, bound for Philadelphia International Airport in Philadelphia, Pennsylvania, with a scheduled stopover at Chicago O'Hare International Airport in Chicago, Illinois. The crew consisted of Captain Alfred C. Haynes, First Officer William Records, and Flight Engineer Dudley Dvorak, all of whom were experienced aviators with United Airlines. The aircraft was also equipped with a Collins Aerospace flight control system and a Honeywell autopilot system. The National Weather Service had issued a severe thunderstorm warning for the area, which included Sioux City, Iowa, and the crew was aware of the weather conditions.

Accident

The accident occurred at approximately 15:00 local time, when the tail section of the aircraft suffered a catastrophic failure, resulting in a loss of hydraulic systems and subsequent loss of control. The crew, led by Captain Alfred C. Haynes, attempted to control the aircraft using throttle control, but were unable to prevent the aircraft from crashing at Sioux Gateway Airport in Sioux City, Iowa. The impact and subsequent fire resulted in the deaths of 111 people, with 185 survivors, including the crew. The accident was witnessed by several people on the ground, including Sioux City, Iowa residents and airport personnel. The American Red Cross and Sioux City, Iowa emergency services responded to the accident, providing assistance to the survivors. The Federal Bureau of Investigation (FBI) and the National Transportation Safety Board (NTSB) also responded to the scene, with the NTSB leading the investigation.

Investigation

The investigation into the accident was led by the National Transportation Safety Board (NTSB), with assistance from the Federal Aviation Administration (FAA), McDonnell Douglas, and General Electric, the manufacturer of the CF6 engine. The investigation revealed that the failure of the tail section was caused by a faulty engine mount, which had been damaged during a previous maintenance procedure. The investigation also identified several contributing factors, including inadequate maintenance procedures and a lack of pilot training on the use of throttle control in emergency situations. The NTSB issued several recommendations as a result of the investigation, including changes to maintenance procedures and the development of new pilot training programs. The FAA also issued several airworthiness directives, requiring airlines to inspect and modify their DC-10 fleets to prevent similar accidents. The International Air Transport Association (IATA) and the International Civil Aviation Organization (ICAO) also reviewed the accident and issued recommendations for improving aviation safety.

Aftermath

The accident had a significant impact on the aviation industry, leading to changes in maintenance procedures and pilot training programs. The NTSB recommendations and FAA airworthiness directives resulted in the modification of DC-10 fleets worldwide, and the development of new pilot training programs focused on emergency procedures. The accident also led to the development of new safety technologies, including improved engine mounts and hydraulic systems. The Sioux City, Iowa community came together to support the survivors and families of the victims, with the Sioux City, Iowa hospital providing medical care to the injured. The American Red Cross and other charity organizations also provided assistance to the families of the victims. The United States Congress held hearings on the accident, with testimony from the NTSB, FAA, and United Airlines.

Legacy

The accident has been the subject of several documentary films and books, including Mayday (TV series) and Aircraft Accident Report. The accident is also commemorated by a memorial at Sioux Gateway Airport in Sioux City, Iowa, which honors the victims and survivors of the accident. The Captain Alfred C. Haynes award is also presented annually by the Air Line Pilots Association to recognize outstanding pilots who have demonstrated exceptional skill and bravery in emergency situations. The National Air and Space Museum and the Smithsonian Institution have also recognized the significance of the accident, with exhibits and displays honoring the crew and passengers of the flight. The International Air Transport Association (IATA) and the International Civil Aviation Organization (ICAO) have also recognized the importance of the accident in improving aviation safety worldwide. Category:Aviation accidents and incidents