Why is engine monitoring considered essential during flight?

Engine monitoring is considered essential during flight because it directly impacts the aircraft's performance, safety, and overall operational reliability. Keeping a close watch on engine parameters—such as oil pressure, temperature, RPM, and fuel flow—allows pilots to detect any abnormalities early. This proactive approach helps in identifying potential issues before they escalate into critical failures. Ensuring the engine operates within its specified limits is crucial for maintaining operational integrity and the safety of everyone aboard.

While maximizing cruising altitude, improving passenger comfort, and maintaining optimal fuel efficiency are all important aspects of flight, these outcomes are closely tied to the effective management and health of the engine. A well-monitored engine promotes better performance, which in turn supports those other objectives, but the primary imperative is ensuring that the engine remains safe and reliable throughout the flight.