Known as the Airborne Collision Avoidance System (ACAS) or Traffic Alert Collision Avoidance System (TCAS), it is a system ...

The FAA said that several flight crews inbound to the Reagan National Airport reported onboard alerts when no other aircraft were nearby.

The FAA is investigating reports about recent flights at Reagan National Airport in Washington, D.C., receiving false alarms about midair collisions over the weekend.

In one blitz just after 9 a.m., six similar false alerts were reported within 11 minutes of each other, according to the news station.

“It’s been happening all morning. Let me know if you see anything. No one else has seen anything except for on the TCAS,” one air traffic controller can be heard telling an inbound fligh ...

The Federal Aviation Administration is investigating why multiple commercial flights about to land at Reagan National Airport, near Washington D.C., repeatedly received midair collision alerts when ...

Several flight crews reported the mystery alerts on their Traffic Collision Avoidance System, known as TCAS, on Saturday “indicating another aircraft was nearby when no other aircraft were in ...

The tragic midair collision at Reagan Washington National Airport in January this year brought the focus on the congested ...

"It's been happening all morning. Let me know if you see anything. No one else has seen anything except for on the TCAS," one air traffic controller can be heard telling an inbound flight.