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Arrange the path of a parameter from sensor to recorder in order:

1. A sensor produces a signal at the aircraft system

2. The flight data acquisition unit collects and converts it

3. The value is placed in its allocated word in the data frame

4. The frame is written to the crash protected memory

5. The oldest material beyond the retention period is overwritten

Select the correct sequence.

  • A.1, 3, 2, 4, 5
  • B.1, 2, 4, 3, 5
  • C.1, 2, 3, 4, 5
  • D.2, 1, 3, 4, 5

Answer: C

The acquisition unit sits between the aircraft and the recorder, so a fault there loses parameters while the recorder itself remains serviceable. The frame layout is what ties a word position to a particular parameter.

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