Buffalo Airways Flight 721

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Buffalo Airways Flight 721
Buffalo Airways Boeing 707-399C N106BV (24715638762).jpg
A Buffalo Airways Boeing 707, similar to the one involved
Accident
Date13 April 1987 (1987-04-13)
Summary Controlled flight into terrain due to pilot error
SiteNear Kansas City International Airport, Missouri, United States
39°14′50.2″N94°44′45.6″W / 39.247278°N 94.746000°W / 39.247278; -94.746000
Aircraft
Aircraft type Boeing 707-351C
OperatorBuffalo Airways, leased by Burlington Air Express
IATA flight No.BV721
ICAO flight No.BVA721
Registration N144SP
Flight origin Oklahoma City Airport, Oklahoma, United States
1st stopover Wichita Dwight D. Eisenhower National Airport, Kansas, United States
2nd stopover Kansas City International Airport, Missouri, United States
Destination Fort Wayne International Airport, Indiana, United States
Occupants4
Passengers1
Crew3
Fatalities4
Survivors0

On 13 April, 1987, Buffalo Airways Flight 721, a Boeing 707-351C operating a national cargo flight in the United States from Oklahoma City Airport, Oklahoma, to Fort Wayne International Airport, Indiana, with stopovers in Wichita, Kansas and Kansas City, Missouri, crashed on approach to its second stopover. All four people on board were killed. The investigation on the crash found out that the accident was a case of controlled flight into terrain, caused mainly by errors of the crew. [1]

Contents

Aircraft

The aircraft involved in the accident was a Boeing 707-351C registered as N144SP and manufactured in 1966. [1] The aircraft was owned by Buffalo Airlines, a texan cargo airline, and operated for Burlington Air Express.[ citation needed ]

The three crew members on board were 52 years old pilot Clarence Brenner, 40 years old first officer David Lee Zupancic and 22 years old flight engineer Nichols Paul Pannell. On board there was also an airline-authorized passenger, 36 years old John Earl Lemery, that boarded the plane in Wichita. [2]

Accident

Flight 721 departed from Wichita at around 9:22 pm local time, after an uneventful first leg from Oklahoma City, with four crew members and a single passenger on board. The climb and cruise went as planned and at 9:42 pm local time the aircraft started the approach to Kansas City and prepared for a ILS landing. When the crew initiated the descent from the cruising altitude the visibility and weather conditions were normal. Ten minutes after the beginning of the approach the first officer reported to the air traffic controller their descent altitude in 100 feet increments above minimum decision height, just a minute later the aircraft was 200 feet above minimum decision height and so the air traffic controller, after receiving a low altitude alert from his radar, asked to the crew of Flight 721 to check their current altitude. The controller warned the pilots two separate times, and they didn't respond on both occasions. [3] Less than ten seconds after the aircraft impacted the ground, the aircraft's flight recorder recorded an increase of the engine power, in the crew's last attempt to save the plane. The aircraft impacted treetops on a hill located about five and a half kilometers south of the airport in Platte County, then rolled right and finally crashed and burst into flames about 600 meters from the initial impact site. All four occupants on board were killed. [1] [4] [2] [5] [2] [6]

Investigation

The National Transportation Safety Board investigation on the accident found out that the main cause of the crash were errors by the crew that didn't follow the minimum decision height, leading to the aircraft being outside the glideslope path, putting it in a collision course with surrounding terrain. The report cited bad cockpit resource management as the main cause of the errors committed by the crew members. Also the aircraft's ground proximity warning system (GPWS) system failed for unknown reasons, and so didn't warn the pilots in time to adjust the aircraft altitude. [3] [4]

References

  1. 1 2 3 "Accident Boeing 707-351C N144SP Monday 13 April 1987". Aviation Safety Network. Retrieved 23 August 2025.
  2. 1 2 3 JOSEPH KEENAN (14 April 1987). "Four die in plane crash". UPI. Retrieved 27 August 2025.
  3. 1 2 "AIRCRAFT ACCIDENT/INCIDENT SUMMARY" (PDF). NTSB. Retrieved 27 August 2025.
  4. 1 2 "Crash of a Boeing 707-351C in Kansas City: 4 killed". Bureau of Aviation Accidents Archives. Retrieved 27 August 2025.
  5. "Cargo Jet Crash Kills Four in Kansas City". Los Angeles Times. 14 April 1987. Retrieved 27 August 2025.
  6. "707 CREW WAS WARNED BEFORE CRASH". Washington Post. 15 April 1987. Retrieved 27 August 2025.