Narrative:
A McDonnell Douglas DC-10-10 operated by United Airlines, suffered a landing accident at Denver-Stapleton Airport, CO.
As the captain was deploying reversers during landing, reversers no. 2 and 3 unlocked and deployed, but reverser no. 1 was binding and only moved to the unlocked position. The captain was not warned of this condition, though the second officer should have monitored the illumination of the reverser lights. The captain said he reached to check the no. 1 lever. At about that time, the aircraft yawed right. Despite immediate action by the captain, directional control of the aircraft was lost due to yawing caused by the inoperative thrust reverser. The aircraft continued off the runway, crossed two taxiways and the nose gear collapsed.
After stopping, evacuation was ordered. Evacuation slides deployed normally, but with the aircraft on its nose, use of slides at doors 4L & 4R was discontinued due to excessive vertical angle of slides.
Investigation revealed that after touchdown, engine no. 1 accelerated with forward thrust as no. 2 and 3 engines provided reverse thrust. At about the same time, the aircraft's nose lifted off the runway to a 4 degree attitude and the aircraft went off the runway.
Probable cause:
monitoring..inadequate..flight engineer
thrust reverser,cockpit control..bent
thrust reverser,cockpit control..binding(mechanical)
reversers..improper use of..pilot in command
directional control..not maintained..pilot in command
thrust reverser..inoperative
Runway excursion
| Status: | Accident investigation report completed and information captured |
| Date: | Monday 12 September 1988 |
| Time: | 13:50 |
| Type: |  McDonnell Douglas DC-10-10 |
| Operator: | United Airlines |
| Registration: | N1830U |
| MSN: | 46629/208 |
| First flight: | 1975 |
| Total airframe hrs: | 37265 |
| Engines: | 3 General Electric CF6-6D |
| Crew: | Fatalities: 0 / Occupants: 10 |
| Passengers: | Fatalities: 0 / Occupants: 197 |
| Total: | Fatalities: 0 / Occupants: 207 |
| Aircraft damage: | Substantial |
| Aircraft fate: | Repaired |
| Location: | Denver-Stapleton International Airport, CO (DEN) ( United States of America)
|
| Phase: | Landing (LDG) |
| Nature: | Domestic Scheduled Passenger |
| Departure airport: | Chicago-O'Hare International Airport, IL (ORD/KORD), United States of America |
| Denver-Stapleton International Airport, CO (DEN/KDEN), United States of America |
A McDonnell Douglas DC-10-10 operated by United Airlines, suffered a landing accident at Denver-Stapleton Airport, CO.
As the captain was deploying reversers during landing, reversers no. 2 and 3 unlocked and deployed, but reverser no. 1 was binding and only moved to the unlocked position. The captain was not warned of this condition, though the second officer should have monitored the illumination of the reverser lights. The captain said he reached to check the no. 1 lever. At about that time, the aircraft yawed right. Despite immediate action by the captain, directional control of the aircraft was lost due to yawing caused by the inoperative thrust reverser. The aircraft continued off the runway, crossed two taxiways and the nose gear collapsed.
After stopping, evacuation was ordered. Evacuation slides deployed normally, but with the aircraft on its nose, use of slides at doors 4L & 4R was discontinued due to excessive vertical angle of slides.
Investigation revealed that after touchdown, engine no. 1 accelerated with forward thrust as no. 2 and 3 engines provided reverse thrust. At about the same time, the aircraft's nose lifted off the runway to a 4 degree attitude and the aircraft went off the runway.
Probable Cause:
Probable cause:
monitoring..inadequate..flight engineer
thrust reverser,cockpit control..bent
thrust reverser,cockpit control..binding(mechanical)
reversers..improper use of..pilot in command
directional control..not maintained..pilot in command
thrust reverser..inoperative
Accident investigation:
 |
|
Classification:
Engine reverse issue Runway excursion
Sources:
» NTSBPhotos
Map
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 Chicago-O'Hare International Airport, IL to Denver-Stapleton International Airport, CO as the crow flies is 1436 km (897 miles).
Distance from Chicago-O'Hare International Airport, IL to Denver-Stapleton International Airport, CO as the crow flies is 1436 km (897 miles).
This information is not presented as the Flight Safety Foundation or the Aviation Safety Network’s opinion as to the cause of the accident. It is preliminary and is based on the facts as they are known at this time.
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