Which outcome results when hot gas bypass valving malfunctions causing excessive flow bypass in a turbofan engine?

💡 Explanation

When hot gas bypass malfunctions allow excessive bypass, the compressor operates further from its design point causing reduced pressure ratio and lower core mass flow leading to reduced thrust and increased fuel consumption. Therefore, thrust decreases accompanied by increased fuel burn, rather than stall, overheating, or fan overspeed which arise from distinct mechanisms.

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