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Arrange these steps following a single display unit failure:

1. The display blanks or is annunciated as failed

2. The crew recognises which information has been lost

3. Reversion is selected to move that content to a working screen

4. The surviving screen presents combined content

5. The flight continues with a degraded but usable presentation

Select the correct sequence.

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

Answer: A

Correct answer: 1, 2, 3, 4, 5

The sequence runs from the failure to the continued flight. The display blanks or is annunciated as failed (1); the crew recognises which information has been lost (2), which is not always obvious when several parameters share a screen.

Reversion is then selected to move that content onto a working screen (3), the surviving screen presents the combined content (4), and the flight continues with a degraded but usable presentation (5). Recognition must precede reversion - the crew has to know what is missing before choosing what to bring back.

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