1.1 Why Event Investigation is important

1. Maintenance was the primary cause of 8.3% of the US accidents in the 1990s for 100+ passenger jets.
   
   
2. A maintenance event started the accident chain in 26% of the worldwide accidents in 2003 for Western- and Eastern-built jets and turboprops.
   
   
3. Worldwide ramp incidents cost $5 billion in 2004.
   
   
4. Event investigation programs help to identify contributing factors to errors and violations and to create corrective actions to prevent future events.
   
   
5. Event investigation is a method for sharing human performance issues within the organization.
   
   
6. Event investigation is a key part of a Safety Management System, required by many National Aviation Authorities (NAAs).