The "FAA Office of Accident Investigation" refers to the division within the Federal Aviation Administration (FAA) responsible for investigating aviation accidents and incidents in the United States. The FAA is a government agency under the Department of Transportation, tasked with regulating and overseeing the safety of civil aviation.

The Office of Accident Investigation is responsible for:

1. Investigating accidents and incidents: The office investigates all aviation accidents and incidents, including those involving commercial airlines, general aviation, and other aircraft.
2. Determining probable causes: The office works to determine the probable causes of accidents and incidents, identifying contributing factors such as human error, mechanical failures, or environmental conditions.
3. Developing safety recommendations: Based on the results of investigations, the office develops safety recommendations to prevent similar accidents or incidents from occurring in the future.
4. Improving aviation safety: The office collaborates with other FAA offices, industry stakeholders, and international organizations to implement safety recommendations and improve the overall safety of the aviation system.

The FAA Office of Accident Investigation plays a critical role in promoting aviation safety by:

• Identifying and addressing safety risks
• Developing and implementing safety policies and procedures
• Providing guidance and oversight to the aviation industry
• Collaborating with international aviation organizations to share best practices and safety information

The office's work helps to reduce the risk of accidents and incidents, protecting the safety of passengers, crew members, and people on the ground.