Which document is key in monitoring the history of an aircraft component?

The document crucial for monitoring the history of an aircraft component is the 2408-16. This document serves as the maintenance record, documenting all maintenance activities, inspections, and alterations performed on a specific aircraft component. Keeping a detailed history is vital for ensuring safety, compliance with regulatory standards, and adherence to the manufacturer’s guidelines.

The 2408-16 includes information such as the part number, serial number, date of service, and details of the work performed, making it an essential tool for maintenance personnel. By reviewing this document, technicians can make informed decisions about the maintenance needs and serviceability of the component, ensuring operational reliability and safety of the aircraft.

In contrast, the other options—the 2408-19, 2408-20, and 2408-21—while relevant to different aspects of aircraft maintenance documentation, do not specifically focus on the detailed history of individual components like the 2408-16 does. Each of these documents has its own purpose and may pertain to other maintenance or operational records, but they do not provide the comprehensive history tracking that the 2408-16 does.