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Last updated: 22 September 2020
Date:Monday 7 June 1971
Type:Silhouette image of generic CVLT model; specific model in this crash may look slightly different
Convair CV-580
Operator:Allegheny Airlines
Registration: N5832
C/n / msn: 384
First flight: 1956
Total airframe hrs:33058
Engines: 2 Allison 501-D13
Crew:Fatalities: 2 / Occupants: 3
Passengers:Fatalities: 26 / Occupants: 28
Total:Fatalities: 28 / Occupants: 31
Aircraft damage: Damaged beyond repair
Location:1,5 km (0.9 mls) S of New Haven Airport, CT (HVN) (   United States of America)
Phase: Approach (APR)
Nature:Domestic Scheduled Passenger
Departure airport:Groton-New London Airport, CT (GON/KGON), United States of America
Destination airport:New Haven Airport, CT (HVN/KHVN), United States of America
Flightnumber: 485
The aircraft struck cottages, located 4890 feet short of runway 02, and crashed. The aircraft was on a non precision instrument approach.
The Convair was originally manufactured as a Convair CV-440 and converted to a Convair 580. The plane had flown 8406 hours since the conversion in September 1967.

Probable Cause:

PROBABLE CAUSE: "The captain's intentional descent below the prescribed minimum descent altitude under adverse weather conditions without adequate forward visibility or the crew's sighting of the runway environment. The captain disregarded advisories from his first officer that minimum descent altitude had been reached and that the airplane was continuing to descend at a normal descent rate and airspeed. The Board was unable to determine what motivated the captain to disregard prescribed operating procedures and altitude restrictions and finds it difficult to reconcile the actions he exhibited during the conduct of this flight."

Accident investigation:
Investigating agency: NTSB
Status: Investigation completed
Duration: 1 years
Accident number: NTSB/AAR-72-20
Download report: Final report


Controlled Flight Into Terrain (CFIT) - Ground

» ICAO Accident Digest Circular 118-AN/88 (165-186)

Follow-up / safety actions

NTSB issued 14 Safety Recommendations

Show all...


photo of Convair-CV-580-N5832
accident date: 07-06-1971
type: Convair CV-580
registration: N5832

This map shows the airport of departure and the intended destination of the flight. The line between the airports does not display the exact flight path.
Distance from Groton-New London Airport, CT to New Haven Airport, CT as the crow flies is 70 km (44 miles).

This information is not presented as the Flight Safety Foundation or the Aviation Safety Network’s opinion as to the cause of the accident. It is preliminary and is based on the facts as they are known at this time.
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Convair CV-580

  • 182 built
  • 8th loss
  • 5th fatal accident
  • 2nd worst accident (at the time)
  • 3rd worst accident (currently)
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