FAA Investigates False TCAS Alerts at Ronald Reagan Washington National Airport

On the morning of March 1, 2025, the Federal Aviation Administration (FAA) reported that multiple pilots received false Traffic Collision Avoidance System (TCAS) alerts while approaching Ronald Reagan Washington National Airport (DCA). The unexpected warnings caused concern among flight crews, with some aircraft forced to execute go-arounds.

Unexplained Midair False TCAS Alerts

According to the FAA, TCAS is an airborne system designed to operate independently of ground-based air traffic control (ATC), providing collision threat alerts and traffic displays to pilots. However, on this particular morning, several commercial flights landing at DCA experienced midair collision warnings despite no aircraft being present in close proximity.

Alarming Frequency of False TCAS Alerts

Photo By Matti Blume

A CBS News analysis of air traffic control audio revealed that at least 12 flight crews reported false TCAS warnings between 06:00 and 10:00 local time. Among these, three flights had to conduct go-arounds, and six of the incidents occurred within an 11-minute span after 09:00.

Affected Flights and Pilot Reports

One of the affected flights, American Eagle flight 4538, operated by Republic Airways and arriving from New York City’s John F. Kennedy International Airport, encountered a TCAS warning indicating an unidentified aircraft 600 feet above them. The crew reported that they saw nothing to confirm the alert.

Similarly, American Eagle flight 5197, arriving from Minneapolis, experienced the same issue, while American Eagle flight 5098 received two separate TCAS alerts during its approach. The FAA acknowledged these incidents but has not yet confirmed the exact number of affected flights.

FAA Statement on the False TCAS Alerts

In a statement provided to CBS News, the FAA confirmed that multiple flight crews received onboard collision warnings despite no aircraft being in the vicinity. “Some of the crews executed go-arounds as a result of the alerts,” the FAA stated, emphasizing that an investigation is underway to determine the cause of the malfunction.

Photo By Kentaro Iemoto

Connection to Recent Midair Collision

These false TCAS alerts come in the wake of a tragic midair collision over the Potomac River near Washington, involving an American Eagle CRJ700 regional jet and a US Army Black Hawk helicopter. Preliminary findings from the National Transportation Safety Board (NTSB) suggest that the helicopter crew may have missed a crucial instruction from ATC before the crash. Investigators also suspect that the helicopter was flying at an altitude higher than authorized along its designated route.