Investigation and Results
The accident was investigated by the National Transportation Safety Board (NTSB), which published its final report on March 12, 1976. In that report, the NTSB determined the following probable cause for the accident:
"The aircraft's encounter with adverse winds associated with a very strong thunderstorm located astride the ILS localizer course, which resulted in high descent rate into the non-frangible approach light towers. The flight crew's delayed recognition and correction of the high descent rate were probably associated with their reliance upon visual cues rather than on flight instrument reference. However, the adverse winds might have been too severe for a successful approach and landing even had they relied upon and responded rapidly to the indications of the flight instruments."
The NTSB also found the following contributing factor:
"Contributing to the accident was the continued use of runway 22L when it should have become evident to both air traffic control personnel and the flight crew that a severe weather hazard existed along the approach path."
This accident led to the development of the original low level windshear alert system by the U.S. Federal Aviation Administration in 1976 that was installed at 110 FAA towered airports between 1977 and 1987.
Read more about this topic: Eastern Air Lines Flight 66
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