Narrative:
The Boeing 707, named "Kanchenjunga", operated on a flight from Mumbai (Bombay) to London via Delhi, Beirut and Geneva. The flight to and takeoff from Beirut where routine, except for a failure of the no. 2 VOR. At 07:00 GMT the pilot reported reaching FL190 to Geneva ACC. He was told to maintain that flight level "unless able to descend VMC one thousand on top". The pilot confirmed this and added that they were passing abeam Mont Blanc. The controller noted that the flight wasn't abeam Mont Blanc yet and radioed "you have 5 miles to the Mont Blanc", to which the pilot answered with "Roger." Flight 101 then started to descend from FL190 until it struck the Mont Blanc at an elevation of 15585 feet (4750 m).
PROBABLE CAUSE: "The commission concluded that the most likely hypothesis was the following: a) The pilot-in-command, who knew on leaving Beirut that one of the VORs was unserviceable, miscalculated his position in relation to Mont Blanc and reported his own estimate of this position to the controller; the radar controller noted the error, determined the position of the aircraft correctly and passed a communication to the aircraft which, he believed, would enable it to correct its position.; b) For want of a sufficiently precise phraseology, the correction was mis-understood by the pilot who, under the mistaken impression that he had passed the ridge leading to the summit and was still at a flight level which afforded sufficient safety clearance over the top of Mont Blanc, continued his descent."
Navigational error
Controlled Flight Into Terrain (CFIT) - Mountain
accident date: 24-01-1966
type: Boeing 707-437
registration: VT-DMN
| Status: | Accident investigation report completed and information captured |
| Date: | Monday 24 January 1966 |
| Time: | 07:02 UTC |
| Type: |  Boeing 707-437 |
| Operator: | Air-India |
| Registration: | VT-DMN |
| MSN: | 18055/200 |
| First flight: | 1961 |
| Total airframe hrs: | 16188 |
| Engines: | 4 Rolls-Royce Conway 508 |
| Crew: | Fatalities: 11 / Occupants: 11 |
| Passengers: | Fatalities: 106 / Occupants: 106 |
| Total: | Fatalities: 117 / Occupants: 117 |
| Aircraft damage: | Destroyed |
| Aircraft fate: | Written off (damaged beyond repair) |
| Location: | Mont Blanc ( France)
|
| Crash site elevation: | 4750 m (15584 feet) amsl |
| Phase: | En route (ENR) |
| Nature: | International Scheduled Passenger |
| Departure airport: | Beirut International Airport (BEY/OLBA), Lebanon |
| Genève-Cointrin Airport (GVA/LSGG), Switzerland | |
| Flightnumber: | 101 |
The Boeing 707, named "Kanchenjunga", operated on a flight from Mumbai (Bombay) to London via Delhi, Beirut and Geneva. The flight to and takeoff from Beirut where routine, except for a failure of the no. 2 VOR. At 07:00 GMT the pilot reported reaching FL190 to Geneva ACC. He was told to maintain that flight level "unless able to descend VMC one thousand on top". The pilot confirmed this and added that they were passing abeam Mont Blanc. The controller noted that the flight wasn't abeam Mont Blanc yet and radioed "you have 5 miles to the Mont Blanc", to which the pilot answered with "Roger." Flight 101 then started to descend from FL190 until it struck the Mont Blanc at an elevation of 15585 feet (4750 m).
Probable Cause:
PROBABLE CAUSE: "The commission concluded that the most likely hypothesis was the following: a) The pilot-in-command, who knew on leaving Beirut that one of the VORs was unserviceable, miscalculated his position in relation to Mont Blanc and reported his own estimate of this position to the controller; the radar controller noted the error, determined the position of the aircraft correctly and passed a communication to the aircraft which, he believed, would enable it to correct its position.; b) For want of a sufficiently precise phraseology, the correction was mis-understood by the pilot who, under the mistaken impression that he had passed the ridge leading to the summit and was still at a flight level which afforded sufficient safety clearance over the top of Mont Blanc, continued his descent."
Accident investigation:
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|
Classification:
Language/communication problemsNavigational error
Controlled Flight Into Terrain (CFIT) - Mountain
Sources:
» ICAO Circular Accident Digest 18-IPhotos
accident date: 24-01-1966
type: Boeing 707-437
registration: VT-DMN
Map
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 Beirut International Airport to Genève-Cointrin Airport as the crow flies is 2815 km (1759 miles).
Accident location: Approximate; accuracy within a few kilometers.
Distance from Beirut International Airport to Genève-Cointrin Airport as the crow flies is 2815 km (1759 miles).
Accident location: Approximate; accuracy within a few kilometers.
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.
languages: 
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Boeing 707
- 858 built
- 16th loss
- 13th fatal accident
- 2nd worst accident (at the time)
- 9th worst accident (currently)
France- 2nd worst accident (at the time)
- 6th worst accident (currently)
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