Abstract2.1. Accident2.2. Near misses2.3. Risk2.4. Safety2.5. Reliability2.6. Risk management2.7. Incident2.8. Airworthiness2.9. Quality2.10. Airworthiness2.11. Availability2.12. Aircraft maintenance2.13. Sources and types of failure in aircraft2.14. Maintenance system and tasks2.15. Component servicing2.16. Overhaul2.17. Bay servicing2.18. Replacement/throwaway2.19. Functional testing2.20. Calibration2.21. Nondestructive evaluation2.22. Avionics maintenance2.23. Software maintenance2.24. Interdependence of operations and maintenance