How often is the F/A-18 E/F subjected to a “Phase” inspection?

The correct frequency for a “Phase” inspection on the F/A-18 E/F is every 600 flight hours. This systematic inspection is designed to ensure the aircraft’s continued airworthiness and operational readiness. It is an essential procedure that involves a thorough check of various systems, components, and structural integrity, allowing maintenance personnel to identify any potential issues that may arise from wear and tear during normal operations.

Conducting these inspections every 600 flight hours helps maintain the aircraft to the high safety and performance standards required for military operations. Regular inspections at this interval also align with the operational maintenance schedule and ensure that the aircraft can perform effectively in the demanding environments it is tasked with.

The other intervals listed do not meet the specified requirements for the F/A-18 E/F and do not correspond to the prescribed maintenance guidelines that govern the aircraft's operational lifecycle. Thus, the specification of 600 flight hours is crucial for maintaining optimal performance and safety standards in the fleet.