Air France black box signals start fading

On Friday evening The Brazil Air Force and Navy called off the search for additional victims and wreckage from the crashed jet that killed all 228 people on board.

All search operations are under the control of the French navy

"We'll have a better idea July 1 on how much longer we'll go," said U.S. Air Force Col. Willie Berges, the Brazil-based commander of the American military forces supporting the search, USA Today reported.

Berges said searchers were likely to keep going 12 to 15 days past the 30-day mark of the crash, according to the report.

The two recorders are essential to help determine what happened to the crashed jet that plunged into the ocean killing all 228 people on board.

The black boxes' locator beacons, known as pingers, emit signals for 30 days after the crash. After this time has passed, it could become impossible to locate the black box flight recorders and discover what happened to the Airbus A330 which crashed approximately four hours after taking off from Rio en route for Paris.

Searchers have been combing an area with a radius of 50 miles in the hope of detecting signals from the boxes that can be heard only up to about two miles.

The Airbus A330 plane fell into the Atlantic after running into severe thunderstorms.