PROBABLE CAUSE: "The cause of the accident was attributed to pilot error due to the following combination of events: 1) low visibility; 2) tiredness; 3) anxiety; 4) disorientation; 5) lack of experience of overshooting in fog; 6) over-reliance on pressure instruments; 7) position error in pressure instruments; 8) lacunae in training; 9) unsatisfactory overshoot procedure; 10) indifferent flap selector mechanism design; 11) wrong flap selection"
The Board made the following recommendations:
1) Screens should be used during blind flying training.
2) If technically possible, the present director horizons should be replaced by more up-to-date instruments with a greater range of travel and more obvious failure warning flags. The co-pilot's instrument display should, if possible, be equipped with the same type of servo-altimeter as that now provided for the pilot-in-command.
3) Research should he made to determine how far the pressure instruments on the Vanguard are rendered inaccurate during rapid changes of pitch-attitude by position error of the static vent. Depending on the results of this research the necessary modifications should be made to the Vanguard simulator.
4) The system whereby no positive approval of an operator's weather minima is required to be given by the Ministry is unsatisfactory. It gives power whilst withholding responsibility. Positive approval or disapproval should be required.
5) Frequent regular checks should be made of the runway visual range lighting system to ensure that it does not materially differ in intensity from the runway lighting proper.
6) The flight data recorder should include a parameter for elevator angles.
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 Edinburgh-Turnhouse Airport to London-Heathrow Airport as the crow flies is 529 km (331 miles).