Investigation Summary
The collision occurred at approximately 5,000 feet in heavy cloud cover and falling snow. United Flight 826 was inbound to Idlewild Airport (now JFK) and had been instructed to hold at the Preston intersection. However, one of the aircraft's two VHF Omni-directional Range (VOR) receivers was inoperative, making it difficult for the crew to identify the intersection precisely. Combined with a high approach speed, the DC-8 overshot the holding point by approximately 11 miles. TWA Flight 266 was under radar vectors for an approach to LaGuardia Airport when the United jet struck it from the side. The investigation highlighted the dangers of high-speed jet operations in a congested terminal area still largely reliant on procedural separation and manual navigation, especially during the poor visibility caused by the winter storm.
Final Conclusions
The Civil Aeronautics Board (CAB) determined the probable cause was United Flight 826 proceeding beyond its cleared limit and the confines of the airspace allocated to it. A contributing factor was the high speed of the DC-8 as it approached the Preston intersection, coupled with the failure of the crew to notify air traffic control of their inoperative navigation equipment, which would have necessitated different handling in the busy New York corridor.
Photographic Evidence (1)
Video Analysis
No video analysis linked for this case file yet.
Systems & Failure Modes
VOR Receiver
The United DC-8 had one failed receiver, which prevented the crew from using two separate radio beams to cross-reference their exact position at the Preston intersection.
Flight Data Recorder
The DC-8 was equipped with a 'black box' that provided investigators with critical speed and altitude data, a relatively new technology in 1960.
Radar Vectoring
TWA 266 was being actively vectored by radar, but United 826 was operating under procedural separation, meaning controllers were not monitoring its exact position on a screen.
Interesting Facts
- 01It was the first aviation accident investigation to make significant use of a Flight Data Recorder (FDR).
- 02The collision was the deadliest air disaster in history at the time of its occurrence.
- 0311-year-old Stephen Baltz initially survived the crash in Brooklyn but died the following day in the hospital.
- 04The United DC-8 was traveling at approximately 301 knots, nearly double the speed expected for that phase of the approach.
- 05Six people on the ground in Brooklyn were killed when the DC-8 struck the Pillar of Fire Church and surrounding buildings.
Safety Actions & Advisories
Speed Restrictions
The FAA established a maximum speed limit of 250 knots for aircraft operating below 10,000 feet within 30 nautical miles of a destination airport.
Equipment Failure Reporting
New regulations mandated that pilots immediately report any malfunctions of navigation or communication equipment to Air Traffic Control.
Positive Radar Control
The disaster accelerated the implementation of 'positive control' airspace, requiring all aircraft in busy terminal areas to be equipped with transponders and under active radar surveillance.