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11. Aeroplane aerodynamics, structures and systems

If the battery fails on the ground (INS System)

  • an amber light appears on the MSU and a horn sounds.
  • a red warning light appears on the MSU and a horn sounds.
  • a red light appears on the CDU and a horn sounds.

Explanation from PART66Online

Loss of the standby battery on the ground threatens the critical alignment, so it is annunciated as a red warning on the mode selector unit accompanied by an aural horn to draw immediate crew attention. A red (not amber) indication reflects the seriousness of losing battery backup during alignment.

T

ta2x asked · 13 Feb 2019

What is MSU?

Community Comments (1)

G
grigo92 20 Apr 2019
INS MSU ( Mode Selector Unit)

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