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| Title: | Loss of control, Delta Air Lines, Inc., McDonnell Douglas DC-9-14, N3305L, Greater Southwest International Airport, Fort Worth, Texas, May 30, 1972 |
| Micro summary: | On a simulated go-around, this McDonnell Douglas DC-9-14 experienced uncommanded roll in the presence of the wake vortex of a preceding DC-10. |
| Event Time: | 1972-05-30 at 0724 CDT |
| File Name: | 1972-05-30-US.pdf |
| Publishing Agency: | National Transportation Safety Board (NTSB) |
| Publishing Country: | USA |
| Report number: | NTSB-AAR-73-3 |
| Pages: | 44 |
| Site of event: | Landing, GSW RWY 13 |
| Latitude/Longitude: | N32°50' W097°03' |
| Departure: | Dallas Love Field Airport, Dallas, Texas, USA |
| Destination: | Greater Southwest International Airport (GSW) |
| Airplane Type(s): | Douglas DC-9-14 |
| Flight Phase: | Missed Approach |
| Registration(s): | N3305L |
| Operator(s): | Delta Air Lines |
| Type of flight: | Revenue |
| Occupants: | 4 |
| Fatalities: | 4 |
| Serious Injuries: | 0 |
| Minor/Non-Injured: | 0 |
| Other Injuries: | 0 |
| Executive Summary: | A Delta Air Lines, Inc., DC-9-14 crashed while attempting a go-around following a landing approach to Runway 13 at Greater Southwest International Airport, Fort Worth, Texas, at 0724 central daylight time, May 30, 1972. Three Delta Air Lines pilots and one Federal Aviation Administration air carrier operations inspector, the only occupants of the airplane, sustained fatal injuries. The aircraft was demolished by fire and impact. The DC-9 was on a training flight scheduled for the purpose of qualifying two captain trainees for type ratings in the DC-9. A McDonnell Douglas DC-10, American Airlines, Inc., Flight 1114, also on a training flight, had completed a "touch and go" landing on Runway 13 just prior to the landing approach of the DC-9. The final approach phase of the Delta DC-9 appeared normal until the airplane passed the runway threshold. At that time, the airplane began to oscillate about the roll axis. After two or three reversals, the airplane rolled rapidly to the right and struck the runway in an extreme right-wing-low attitude. Fire occurred shortly after initial impact. The National Transportation Safety Board determines that the probable cause of the accident was an encounter with a trailing vortex generated by a preceding "heavy" jet which resulted in an involuntary loss of control of the airplane during the final approach. Although cautioned to expect turbulence the crew did not have sufficient information to evaluate accurately the hazard or the possible location of the vortex. Existing FAA procedures for controlling VFR flight did not provide the same protection from a vortex encounter as was provided to flights being given radar vectors in either IFR or VFR conditions. As a result of the investigation of this accident, the Safety Board has made eight recommendations to the Administrator of the Federal Aviation Administration. |
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