What powers each AHRS if its respective power source is lost?

What powers each AHRS if its respective power source is lost?

• A. External power only
• B. Solar power
• C. Battery power for up to 11 minutes
• D. Generator power

Answer: (C)

The important idea is that attitude data must stay available even if the main power source fails. In the CRJ-550, each AHRS has its own independent backup power. If the primary power source feeding a particular AHRS is lost, that unit continues to operate on its dedicated battery for up to about 11 minutes. This provides continued attitude and heading information long enough for the crew to restore power, switch to an alternate reference, or reconfigure navigation as needed. External power or generator power isn’t available in this situation because the source is already lost, and solar power isn’t used for powering AHRS. The backup battery design ensures the system remains usable during brief electrical outages.

The important idea is that attitude data must stay available even if the main power source fails. In the CRJ-550, each AHRS has its own independent backup power. If the primary power source feeding a particular AHRS is lost, that unit continues to operate on its dedicated battery for up to about 11 minutes. This provides continued attitude and heading information long enough for the crew to restore power, switch to an alternate reference, or reconfigure navigation as needed. External power or generator power isn’t available in this situation because the source is already lost, and solar power isn’t used for powering AHRS. The backup battery design ensures the system remains usable during brief electrical outages.