Investigation Summary
The flight departed La Guardia at approximately 22:20 EDT for a scheduled short-haul trip to Nantucket. As the aircraft approached the destination, weather conditions deteriorated rapidly due to heavy fog. Although the legal minimum visibility for a VOR approach at Nantucket was one mile, the actual visibility had dropped to one-eighth of a mile. The Civil Aeronautics Board (CAB) investigation revealed that the captain failed to acknowledge or act upon radio transmissions from the airline's ground station warning of the worsening weather. The aircraft descended below the minimum descent altitude without visual contact with the runway environment. The Convair 240 struck the ground in a level attitude, skidded through scrub oak, and came to rest in a swampy area where it was consumed by fire. The CAB highlighted significant deficiencies in Northeast Airlines' operational control, noting that the company's radio monitoring and pilot proficiency records were inadequate.
Final Conclusions
The Civil Aeronautics Board determined the probable cause was the captain's decision to attempt an approach and landing when the reported visibility was below the authorized minimums, and his failure to properly monitor the aircraft's altitude during the final stages of the approach. Contributing factors included the airline's lax operational procedures and the crew's failure to adhere to established instrument approach protocols.
Video Analysis
No video analysis linked for this case file yet.
Systems & Failure Modes
VOR (VHF Omnidirectional Range)
A ground-based radio navigation system used by the crew to execute a non-precision approach to Runway 24.
Altimeter
The investigation reviewed the aircraft's altimeters to determine if instrument error contributed to the premature descent, but found no evidence of mechanical failure.
Interesting Facts
- 01The accident resulted in the death of Gordon Dean, former chairman of the U.S. Atomic Energy Commission.
- 02Visibility at the time of the crash was 1/8 mile in fog, while the legal minimum for the approach was 1 mile.
- 03The aircraft crashed 1,450 feet short of the runway and 600 feet to the right of the centerline.
- 04Nine people survived the initial impact and fire, including a two-year-old child.
- 05The crash led to a landmark legal case, Kilberg v. Northeast Airlines, regarding statutory limits on wrongful death damages.
- 06A total of 25 people were killed, including all three crew members and 22 passengers.
Safety Actions & Advisories
Operational Oversight Improvements
The CAB recommended that Northeast Airlines improve its recordkeeping and monitoring of company radio frequencies to ensure crews receive timely weather updates.
Aircrew Proficiency Training
The investigation led to a review of training procedures for instrument approaches and stricter adherence to weather minimums.