The PRIME BST PUMP ON advisory indicates what?

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Multiple Choice

The PRIME BST PUMP ON advisory indicates what?

Explanation:
PRIME BST PUMP ON tells you that the APU boost pump switch is in the Prime or APU Boost position. This means the APU boost pump is actively being used to prime the fuel system, filling the fuel lines and removing air to prepare for engine start (or to feed the APU as it spools up). It’s a dedicated priming function, not indicating normal engine operation, so seeing this advisory confirms you’re in the priming configuration.

PRIME BST PUMP ON tells you that the APU boost pump switch is in the Prime or APU Boost position. This means the APU boost pump is actively being used to prime the fuel system, filling the fuel lines and removing air to prepare for engine start (or to feed the APU as it spools up). It’s a dedicated priming function, not indicating normal engine operation, so seeing this advisory confirms you’re in the priming configuration.

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