1973-07-17: Convair CV-640 — SATA - Société Anonyme de Transport Aérien Genève — Tromsø, Norway

No fatalities • Tromsø, Norway • Landing (descent or approach)

Probable cause

Wrong approach configuration on part of the captain who failed to follow several points of the approach procedure. The following factors were reported: - The plane landed in a nose-down attitude, causing the nose gear to touchdown first and to collapse due to excessive g loads, - The flaps were down at an angle of 40° while the company procedure did not allow more than 33°, - The approach was completed with a tailwind of 10 knots, the maximum allowable speed, - The captain failed to react in time and to initiate appropriate corrective actions.

— NTSB Determination

Accident narrative

Following an uneventful charter flight from Zurich, the crew started the approach to runway 19 in excellent weather conditions. Following a wrong approach configuration, the aircraft landed nose first. On touchdown, the nose gear collapsed and the airplane slid on its nose for several meters before both mains gears collapsed as well. The airplane slid on its belly for dozen meters, veered off runway to the left and came to rest in a grassy area. All 60 occupants were evacuated safely while the aircraft was damaged beyond repair.

Probable cause (official findings): Wrong approach configuration on part of the captain who failed to follow several points of the approach procedure. The following factors were reported: - The plane landed in a nose-down attitude, causing the nose gear to touchdown first and to collapse due to excessive g loads, - The flaps were down at an angle of 40° while the company procedure did not allow more than 33°, - The approach was completed with a tailwind of 10 knots, the maximum allowable speed, - The captain failed to react in time and to initiate appropriate corrective actions.

Frequently asked questions

What happened in the 1973-07-17 Convair CV-640 accident near Tromsø, Norway?

Following an uneventful charter flight from Zurich, the crew started the approach to runway 19 in excellent weather conditions. Following a wrong approach configuration, the aircraft landed nose first. On touchdown, the nose gear collapsed and the airplane slid on its nose for several meters before both mains gears…

Were there any fatalities in the 1973-07-17 Convair CV-640 accident?

No fatalities were recorded in this accident.

What aircraft was involved and where did it happen?

The accident on 1973-07-17 involved a Convair CV-640, registration HB-IMM, operated by SATA - Société Anonyme de Transport Aérien Genève, at Tromsø, Norway.

What was the probable cause of the accident?

Wrong approach configuration on part of the captain who failed to follow several points of the approach procedure. The following factors were reported: - The plane landed in a nose-down attitude, causing the nose gear to touchdown first and to collapse due to excessive g loads, - The flaps were down at an angle of…

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