What should engine power be limited to during ground operations?

The correct answer is that engine power during ground operations should be limited to 70% N2. This limitation is set to ensure operational safety and engine integrity while the aircraft is on the ground.

Maintaining engine power at this level prevents excessive stress on engine components, reduces wear and tear, and ensures proper temperature management. During ground operations, particularly while taxiing or holding, limiting the power to 70% N2 helps avoid situations such as compressor stall or excessive engine temperature that may arise from operating at higher power settings. In addition, it ensures compliance with regulatory requirements and safety standards established by manufacturers and aviation authorities to protect the overall health of the engine over its operational lifetime.