The system of 1984, full authority of the invention comprises a first computer, 1984, 16 which is sensitive to the conditions of operation of an apparatus 10, and a second computer 62 which is sensitive to a selection of these conditions. An analog control circuit 22 is also sensitive to the operating conditions in order to generate signals corresponding to the control signals coming from the first computer 16 and which is located in the intervals of acceptable values. The switching means 71, 72, 75 are provided in order to isolate the apparatus 10 of the first computer 16 and its control in the second computer 62 in response to the difference between the signals predetermined begettest in the circuit of the control and the corresponding signals coming from the first computer 16. / p & & p & application is a gas turbine engine.
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