No fatalities

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

Tromsø, NorwayLanding (descent or approach)

On July 17, 1973, a Convair CV-640 (registration HB-IMM) operated by SATA - Société Anonyme de Transport Aérien Genève was involved in an aviation accident near Tromsø, Norway during landing or approach. No fatalities were reported. Investigators recorded the probable cause as: Wrong approach configuration on part of the captain who failed to follow several points of the approach procedure. This summary draws on records from the Bureau of Aircraft Accidents Archives (B3A); 1 related events involving the same aircraft type or operator are linked below.

Sourcesthe Bureau of Aircraft Accidents Archives (B3A)Primary reportUpdated 1781232484Data APIEditorial standards

A charter flight from Zurich landed nose-first on runway 19, causing the nose gear to collapse. Both main gears subsequently failed, and the aircraft slid off the runway into a grassy area. All 60 occupants evacuated safely.

Accident Description

A charter flight originating from Zurich conducted an approach to runway 19 under excellent weather conditions. The crew configured the aircraft for landing, but the approach setup deviated from standard procedures. As a result, the aircraft touched down in a nose-down attitude, causing the nose landing gear to strike the runway first. The nose gear collapsed immediately upon touchdown due to excessive g-loads.

After the nose gear failure, the aircraft slid on its nose for several meters before both main landing gears also collapsed. The airplane then slid on its belly for dozens of meters, veered left off the runway, and came to rest on a grassy area. The aircraft sustained substantial damage and was deemed beyond repair. All 60 occupants on board were evacuated safely.

Probable Cause

The official investigation determined the probable cause was a wrong approach configuration on the part of the captain, who failed to follow several points of the approach procedure. Contributing factors included:

  • The aircraft landed in a nose-down attitude, causing the nose gear to touchdown first and collapse due to excessive g-loads.
  • The flaps were set to 40°, while company procedures did not allow more than 33°.
  • The approach was completed with a tailwind of 10 knots, the maximum allowable speed for the configuration.
  • The captain failed to initiate appropriate corrective actions in a timely manner.

No other causes or factors were reported.