To maintain compliance with safety standards, how often should Airworthiness Directives be reviewed?

Airworthiness Directives (ADs) are issued by the Federal Aviation Administration (FAA) to address safety issues and compliance for aircraft, including helicopters. Regular review of these directives is essential for maintaining the safety and airworthiness of the aircraft.

The correct approach to reviewing ADs is “regularly, as issued by the FAA.” This means that pilots and maintenance personnel should stay informed about new ADs and review applicable ones as they are published. Since ADs can vary greatly in their nature and urgency, the frequency of their issuance may be sporadic or may occur multiple times in a short span. It’s not tied to a specific calendar timeframe like monthly or yearly reviews.

This proactive approach ensures that any safety issues are addressed promptly and that the aircraft complies with the latest regulations, preventing potential hazards. Regular review enables adherence to the updates that affect the aircraft's airworthiness status and avoids overlooking critical safety information.

Meanwhile, the other options suggest fixed intervals or conditions that do not adequately align with the FAA's approach to AD updates, which depend on ongoing safety assessments rather than a predetermined timeline. This makes the correct answer essential for effective safety management and compliance in aviation operations.