Event Details

Title:Runway overrun, Piedmont Airlines, Boeing 737, N751N, Greensboro, North Carolina, October 28, 1973
Micro summary:This Boeing 737 overran the runway on landing.
Event Time:1973-10-28 at 2221 EST
File Name:1973-10-28-US.pdf
Publishing Agency:National Transportation Safety Board (NTSB)
Publishing Country:USA
Report number:NTSB-AAR-74-7
Site of event:RWY 14
Latitude/Longitude:N3606' W07957'
Departure:Nashville International Airport, Nashville, Tennessee, USA
Destination:Piedmont Triad International Airport, Greensboro, North Carolina, USA
Airplane Type(s):Boeing 737
Flight Phase:Landing
Operator(s):Piedmont Airlines
Type of flight:Revenue
Serious Injuries:5
Other Injuries:0
Executive Summary:At 2221 EST On October 28, 1973, Piedmont Airlines Flight 20 (N751N), a B-737, ran off the end of runway 14 after landing at the Greensboro-High Point-Winston-Salem Regional Airport, in Greensboro, North Carolina. There were 92 passengers and 4 crewmembers aboard; 4 passengers and 1 flight attendant were injured slightly.

Flight 20 made an ILS approach to runway 14 and touched down at a faster-than-normal airpseed 2,600 feet beyond the approach end of the runway, during heavy rain showers. The aircraft ran off the end of the runway, and the three landing gears collapsed as the aircraft crossed a service road, 640 feet beyond the runway. The aircraft was damaged substantially.

The National Transportation Safety Board determines that the probable cause of this accident was ineffective braking action caused by dynamic hydroplaning on a rain-flooded runway. Additional factors which contributed to the accident were: (1) An unstabilized downwind approach; (2) a relatively long, fast touchdown on a downsloping runway; (3) delayed deployment of the automatic spoilers; and, (4) failure of the crew to deploy the spoilers manually.
Learning Keywords:Operations - Braking Issues (General)
Operations - Runway Overrun
Operations - Slippery Runway, Taxiway, Apron
Operations - Unstabilized Approach
Systems - Flight Controls - Spoilers - Slats - Flaps
Systems - Landing Gear
Systems - Landing Gear - MLG Collapse
Systems - Landing Gear - Nose Gear Collapse


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