Advisory Circular 120-16E describes the 10 elements required of an air carrier maintenance program. These 10 elements are:
1. Airworthiness responsibility
2. Air carrier maintenance manual
3. Air carrier maintenance organization
4. Accomplishment and approval of maintenance and alterations
5. Maintenance schedule
6. Required Inspection Items
7. Maintenance recordkeeping system
8. Contract maintenance
9. Personnel training
10. Continuing Analysis and Surveillance System (CASS)