The FlyRight Aircraft Maintenance (FRAM) division of FlyRight Company (FRC) does all maintenance for FRC's aircraft. Create the data model segment which reflects the following business rules.
- All mechanics are FRC employees. Not all employees are mechanics.
- Some mechanics are specialized in engine (EN) maintenance. Some mechanics are specialized in airframe (AF) maintenance. Some mechanics are specialized in avionics (AV) maintenance. (Avionics are electronic components of aircraft which are utilized in communication and navigation). All mechanics take periodic refresher courses to stay present in their areas of expertise. FRC tracks all courses taken by each mechanic - date, course type, certification (Y/N), and performance.
- FRC maintains a history of employment of all mechanics. The history writes date hired, date promoted, date terminated, and so on.