After an EICAS Control Panel (ECP) failure, which buttons remain operative?

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Multiple Choice

After an EICAS Control Panel (ECP) failure, which buttons remain operative?

Explanation:
When a panel fails, the system preserves only the essential controls that allow you to access and cycle through information on the EICAS display. The buttons that stay operative are the ones that manage the EICAS pages and messages: PRI to show the primary EICAS page, STRAT to access the STRAT-related view, CAS to display Cautions and Advisories, and STEP to step through pages or messages. These controls are wired to independent or backup paths, so they remain usable even when the ECP is down, letting you still review critical information. The other options don’t map to survivable EICAS functions on a failed panel. Navigation in general, broad category selections, or arbitrary lettered buttons aren’t guaranteed to work when the ECP is down.

When a panel fails, the system preserves only the essential controls that allow you to access and cycle through information on the EICAS display. The buttons that stay operative are the ones that manage the EICAS pages and messages: PRI to show the primary EICAS page, STRAT to access the STRAT-related view, CAS to display Cautions and Advisories, and STEP to step through pages or messages. These controls are wired to independent or backup paths, so they remain usable even when the ECP is down, letting you still review critical information.

The other options don’t map to survivable EICAS functions on a failed panel. Navigation in general, broad category selections, or arbitrary lettered buttons aren’t guaranteed to work when the ECP is down.

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