The investigation also identified deficiencies in FAA guidance regarding helicopter route altitudes and boundaries. As a result, routine excursions above the authorized helicopter route altitudes and close proximity incidents that presented a risk of midair collision went unrecognized by Army safety personnel. These recommendations call for comprehensive reforms to helicopter route design, air traffic control procedures, safety management systems, data sharing, and collision avoidance technology. “We will vigorously advocate for the implementation of our safety recommendations — that’s how we prevent a tragedy like this from happening again.”The final the findings, probable cause, and safety recommendations, is available on the accident investigation webpage. Additional material, including the preliminary report, previously issued safety recommendations, news releases, the public docket, investigative updates, and links to photos and videos, are also available on that page.