The role of FAA and NTSB as air travel regulators:

Both the Major air carrier and general aviation accidents (non-commercial aircrafts such as charter planes) are extensively covered under the Aviation Accident law. The aviation accidents are generally caused due to faulty equipment, violations of the rule and procedures prescribed by the Federal Aviation Administration, issues with the structure and design of aircrafts, negligence in the selection of service providers of a carrier and human negligence such as pilot errors.

The air travel in the United States is regulated by two main federal agencies, i.e., the National Transportation Safety Board (NTSB) and the Federal Aviation Administration (FAA). Federal  Aviation Administration is responsible for defining safety standards and rules for the air carriers and aircraft manufacturers. The standards and rules are strictly imposed and organizations are penalized if they fail to comply. On the other hand, the National Transportation Safety Board performs all the investigations after a civil aircraft accident case is reported and shares its recommendations to improve the safety of air travel.