How often must an aircraft undergo a mandatory safety inspection?

An aircraft must undergo a mandatory safety inspection at least once a year to ensure that it meets regulatory safety standards and continues to operate safely. These inspections are crucial for identifying any potential issues that could lead to accidents or malfunctions during operation. The yearly frequency allows for thorough examinations of the aircraft's systems, structure, and components while providing adequate time intervals for maintenance and repairs as needed.

The regulation is designed to balance safety, operational readiness, and logistical demands faced by aircraft operators. Inspections that are performed annually help maintain a consistent record of safety compliance throughout the aircraft's operational life.

More frequent inspections, such as those suggested in the other choices, could theoretically lead to additional safety benefits, but they are not mandated as regular practice in regulations governing aircraft maintenance. Annual inspections strike a practical balance, ensuring safety without imposing undue operational burdens on the operators.