The incident occurred when an air traffic controller reportedly brought his young child to work at New York's John F. Kennedy airport on February 17th and allowed him to make transmissions to planes that were about to take off.
The apparent voice of a child can be heard on recordings from that day making five transmissions to pilots preparing for takeoff.
In one exchange, the voice can be heard saying, "JetBlue 171 contact departure."
The pilot responds: "Over to departure JetBlue 171, awesome job."
The recordings were posted last month on a Web site for air traffic control-listening aficionados.
The Federal Aviation Administration said it was investigating the incident and taking the matter seriously. The employees involved are not controlling air traffic.
The FAA issued a statement saying "this behavior is not acceptable and does not demonstrate the kind of professionalism expected from all FAA employees."
An FAA spokesman Jim Peters said children of the tower's employees were allowed to visit, but needed to get approval from the FAA first.
JFK International Airport is the sixth busiest airport in the United States.
FAA Investigates Child Directing Pilots
Federal Aviation officials are investigating an incident last month in which a child apparently directed pilots from the air traffic control center at one of the busiest airports in the country.