What is involved in the “run-up” check before flight?

The “run-up” check before flight is a critical procedure that focuses on performing engine and systems checks. This phase involves verifying that the helicopter's engine is operating properly, and it includes conducting various tests to assess the performance and functionality of key systems such as the fuel and electrical systems. By running through these checks, pilots can identify any potential issues that could affect flight safety or performance before they take off.

Conducting a thorough run-up check ensures that all systems are functioning within normal parameters. This includes monitoring engine RPM, temperature, and pressures. It may also involve checking hydraulic systems and verifying that all flight controls are operating appropriately. This comprehensive assessment is vital to ensure that pilots can confidently proceed with the flight, knowing that their aircraft is in a safe and reliable condition.

The other answer choices focus on aspects that are either too narrow or do not encompass the full scope of what the run-up check entails, such as visual inspections of the flight path, checking fuel levels alone, or testing communication systems exclusively. While each of these components has its own importance in the broader context of pre-flight preparation, they do not reflect the comprehensive nature of engine and systems checks that are performed during the run-up.