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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