In soft alternate mode, does the EEC redline overspeed protection apply to N1 and N2?

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Study for the Engines Auxiliary Power Unit Test. Prepare with multiple choice questions. Each question comes with hints and explanations. Ensure you're ready for the exam!

Multiple Choice

In soft alternate mode, does the EEC redline overspeed protection apply to N1 and N2?

Explanation:
Over speed protection watches the spool speeds and prevents them from exceeding their redline limits. In soft alternate mode, the engine electronic control still guards both spools, so redline overspeed protection is active for both N1 and N2. If either spool nears its limit, the EEC will intervene (such as by trimming fuel) to keep speeds within safe bounds. That’s why protection for both N1 and N2 is provided.

Over speed protection watches the spool speeds and prevents them from exceeding their redline limits. In soft alternate mode, the engine electronic control still guards both spools, so redline overspeed protection is active for both N1 and N2. If either spool nears its limit, the EEC will intervene (such as by trimming fuel) to keep speeds within safe bounds. That’s why protection for both N1 and N2 is provided.

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