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Search For Flight MH370 Black Boxes Ends; 'Pings' Discounted

The underwater search for black boxes from a missing Malaysian Airlines jet has ended, as the robotic sub that searched nearly 330 square miles of the ocean hasn't found anything to back the idea that "pings" detected came from emergency equipment.

Search and salvage teams will now assess where they should look next for the jet's remains, after Australia's Joint Agency Coordination Center said that "no signs of aircraft debris have been found" by the American Bluefin-21 robotic sub.

When the pings were first detected, the news set off hopes that the mystery of the jet's final resting place might soon be solved. But a senior U.S. Navy official now says the signals detected off the coast of Australia probably didn't come from the plane's data recorders.

From Sydney, reporter Stuart Cohen tells our Newscast unit:

"On Wednesday, a senior U.S. Navy official told CNN that those signals probably came from the ship conducting the search and not from the missing plane at all. The search is far from over, however. Authorities are still moving ahead with plans to broaden the search over tens of thousands of square miles of ocean using high-powered sonar. That's expected to take as long as a year."

"We know that the aircraft entered the water in a long but narrow arc of the southern Indian Ocean," the coordinating agency said, according to Australia's ABC news. "The focus of the ATSB's (Australian Transport Safety Bureau) work now is to narrow the search area of this arc."

The agency said that the ATSB "has advised that the search in the vicinity of the acoustic detections can now be considered complete and in its professional judgment, the area can now be discounted as the final resting place of MH370."

The news comes days after officials finally released satellite data that includes communications with the missing airliner – a move that family members of the passengers had been seeking for weeks.

The Boeing 777 airliner went missing more than 11 weeks ago, with 239 people on board.

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