In the event of power failure of the EICAS Control Panel, what buttons will be operational?

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Multiple Choice

In the event of power failure of the EICAS Control Panel, what buttons will be operational?

Explanation:
When power to the EICAS Control Panel is lost, the system goes into a degraded mode that keeps only the essential controls powered. The buttons that remain operational are PRI, STAT, CAS, and STEP. PRI selects the primary engine data page, STAT displays status and warning information, CAS shows caution/alerts detail, and STEP lets you cycle through the available EICAS pages. These functions are tied to an emergency or essential power path so pilots can still monitor critical systems and navigate what’s shown, even with limited power. Other EICAS controls rely on full panel power and won’t be available in this scenario.

When power to the EICAS Control Panel is lost, the system goes into a degraded mode that keeps only the essential controls powered. The buttons that remain operational are PRI, STAT, CAS, and STEP. PRI selects the primary engine data page, STAT displays status and warning information, CAS shows caution/alerts detail, and STEP lets you cycle through the available EICAS pages. These functions are tied to an emergency or essential power path so pilots can still monitor critical systems and navigate what’s shown, even with limited power. Other EICAS controls rely on full panel power and won’t be available in this scenario.

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