What must be verified before replacing aircraft components?

Before replacing aircraft components, it is essential to verify that the new components are approved and compatible with existing systems because safety and functionality are paramount in aviation. Each component of an aircraft is designed and certified to meet specific standards and regulatory requirements. Using components that are not approved could jeopardize the integrity of the aircraft, leading to potential system failures and safety hazards.

Compatibility with existing systems ensures that the new component functions as intended within the overall architecture of the aircraft. This includes considerations like electrical systems, hydraulic systems, and physical mounting. Verification also involves checking that the component meets all necessary certifications from regulatory bodies, which helps maintain the airworthiness of the aircraft.

While other options may seem relevant—such as the proper disposal of old components or aesthetics—these factors do not directly impact safety or the operational capability of the aircraft in the same way that component approval and compatibility do. Testing in flight, while important, generally pertains to operational confirmation after installation rather than a prerequisite for component replacement.