An internal preliminary report from the Federal Aviation Administration (FAA) reportedly showed that the number of staff members working at the air control tower at Ronald Reagan National Airport in Arlington, Virginia, was “not normal for the time of day and volume of traffic.”

On Wednesday night, an American Airlines plane and Army helicopter collided near Reagan National Airport outside of Washington, D.C., and all 67 people onboard both aircraft are presumed to be dead.

The Associated Press obtained a report which showed one air traffic controller was working two positions at the time of the crash. 

Typically, the two assignments are split between two air traffic controllers, not just one.

The cause of the shortage has been attributed to employee turnover and other factors like tight budgets, and ultimately, it has resulted in many controllers working 10-hour days and as many as six days a week, the Times reported.

Fox News Digital’s Louis Casiano contributed to this report.