46 Years ago today: On 18 December 1977 a Swiss SATA Caravelle crashed into the sea while approaching Funchal, killing 36 out of 57 occupants.

Date:Sunday 18 December 1977
Time:20:14 UTC
Type:Silhouette image of generic S210 model; specific model in this crash may look slightly different
Sud Aviation SE-210 Caravelle 10R
Operator:SA de Transport Aérien – SATA
First flight:1965-12-06 (12 years )
Total airframe hrs:21134
Engines:Pratt & Whitney JT8D-7
Crew:Fatalities: 1 / Occupants: 5
Passengers:Fatalities: 35 / Occupants: 52
Total:Fatalities: 36 / Occupants: 57
Aircraft damage:Damaged beyond repair
Location:4 km (2.5 mls) SSE off Funchal Airport (FNC) (   Portugal)
Phase:Approach (APR)
Nature:Int’l Non Scheduled Passenger
Departure airport:Genève-Cointrin Airport (GVA/LSGG), Switzerland
Destination airport:Funchal Airport (FNC/LPFU), Portugal

Flight SATA 730 was an international charter service from Zurich to Funchal Airport, Madeira, Portugal via Geneva, Switzerland. The Caravelle aircraft landed at Geneva at 14:30 UTC. Departure was delayed because a hydraulic pump had to be replaced. The flight deck crew consisted of two captain. A new captain was in the left-hand seat and was piloting the aircraft. The other captain (who was in the right-hand seat) performed the duties of pilot-in-command, pilot responsible for the initiation to Funchal, route check pilot and co-pilot. Initiation of the new captain was necessary because of the difficult approach and landing at Funchal. However, this initiation ought to have been made by day.
The aircraft took off at 16:26. The flight then progressed in accordance with the flight plan. At 19:38 the crew contacted Madeira control, reporting Rose Point at FL330; the aircraft was cleared to leave this flight level at 19:41. The crew then asked for descent instructions and received clearance to descend to FL50; it was requested to contact control again when this level was reached or when overflying the Porto Santo (PST) NDB. At 19:55 the crew reported being overhead the PST at FL85. The aircraft was instructed to continue its descent to FL50, then to contact Funchal approach control.
At 19:57 the crew contacted Funchal approach control, which stated that runway 06 was in service and cleared the aircraft to descend to 3500 ft, the QNH being 1014.0 mb.
After being cleared for the approach the crew descended below the 720 ft permitted during circling, even though they had lost sight of the runway. The pilots, had lost sight of the runway lights at the end of the downwind leg and at the beginning of the base leg, when the aircraft was already flying below 200 ft. The radio altimeter had probably been preset to 200 ft, but the pilots did not check its indications. The aircraft touched the sea soon after the base leg turn. The landing gear and flaps (20°) were out.
Probable Cause:

CAUSE: “The accident was caused by an involuntary ditching during the approach. The fact that the aircraft was flying below the descent plane may have been due to a lack of co-ordination between the pilots and a sensorial illusion on the part of the crew, when it was preoccupied with the search for visual runway references.”