A Continental Airlines Boeing 737 and a Continental Express Embraer 145 where involved in an airprox near Newark, NJ on January 16.
An air traffic controller at the New York TRACON gave the Continental Express crew the frequency for nearby Teterboro Airport instead of the Newark Airport.
As a result, Newark was temporarily unable to contact the crew as both planes approached Newark. The planes were 600 feet apart in altitude, much closer than the minimum required vertical separation of 1,000 feet.
The FAA is investigating the near miss, which occurred at 14:10 between Continental Flight 536 arriving from Phoenix and the Embraer (ContinentalExpress Flight 2614) arriving from Halifax, Nova Scotia.