Investigation Summary
The investigation into Flight 967 is one of the most enduring mysteries of the early jet era. The aircraft, a Douglas DC-7B, was owned by Delta Air Lines and operated by National Airlines under an equipment interchange agreement. This arrangement allowed through-plane service from Miami to Los Angeles, with National flying the Miami-Tampa-New Orleans legs, Delta scheduled for New Orleans-Dallas, and American Airlines for Dallas-Los Angeles. The flight was cruising at 14,000 feet in clear weather when it suddenly turned 70 degrees and vanished from radar. Search teams recovered only ten bodies and minor buoyant debris, such as upholstery and life rafts. A significant portion of the investigation focused on Robert Vernon Spears, a naturopath and convicted felon who was listed on the manifest but was later found alive in Arizona. It was discovered that William Taylor, a friend of Spears, had boarded the flight using Spears' ticket after Spears purchased a $100,000 life insurance policy. While the FBI and CAB investigated the possibility of a bombing for insurance purposes, the lack of wreckage meant no forensic evidence of an explosion could be confirmed.
Final Conclusions
The Civil Aeronautics Board (CAB) officially concluded that the probable cause of the accident was unknown due to a lack of physical evidence. While sabotage was heavily suspected because of the suspicious circumstances surrounding Robert Spears and William Taylor, investigators could not definitively link them to the crash without the aircraft's fuselage.
Photographic Evidence (1)
Video Analysis
National Airlines Flight 967 News Report | 16 November 1959 — A news report covering the disappearance of National Airlines Flight 967 into the Gulf of Mexico and the subsequent search for survivors and wreckage.
If playback is blocked, the owner has disabled embedding — use the link above.
Airframe & Maintenance
Systems & Failure Modes
Wright R-3350 Engines
The four reciprocating engines powering the DC-7B; no evidence of engine failure was found in the limited debris recovered.
Military Radar (Houma)
The primary source of flight path data, which showed a sudden turn and descent below the radar's horizon.
Interesting Facts
- 01The aircraft was owned by Delta Air Lines but operated by National Airlines under an interchange agreement.
- 02A Coast Guard lookout at Pilottown reported seeing a red flash 'as big as the sun' followed by a falling white light at the time of the crash.
- 03Only 10 bodies and a small amount of floating debris were ever recovered; the main wreckage remains on the sea floor.
- 04Robert Vernon Spears, who was supposed to be on the flight, was arrested in January 1960 in Phoenix, Arizona.
- 05William Taylor, who boarded in Spears' place, was linked to a $100,000 air travel insurance policy taken out by Spears, though Taylor also purchased a personal policy at the airport.
Safety Actions & Advisories
Passenger Manifest and Identity Verification
Source ↗The investigation highlighted the ease with which passengers could swap tickets or use false identities, leading to increased scrutiny of passenger manifest procedures and the eventual implementation of stricter identity verification for air travel.
Airport Insurance Sales Regulation
Source ↗The suspicious $100,000 insurance policy taken out by Spears for a passenger who was not him prompted discussions regarding the regulation of automated air travel insurance kiosks at airports to prevent fraud-motivated sabotage.
Known Controversies & Unanswered Questions
Suspected Sabotage
Reference ↗While the CAB officially listed the cause as unknown, the FBI and investigators strongly suspected a bomb was placed on board by Robert Spears to fake his own death for insurance money. However, without the wreckage, no physical proof of an explosive device was ever found.