WASHINGTON Authentic Stefon Diggs Jersey , March 13 (Xinhua) -- Messages sent by a maintenance alert system cannot provide the "physical location" of a missing plane but indicate whether there are system or engine failures, a U.S. expert said Thursday.

The Wall Street Journal reported earlier in the day that the communication system of the missing Malaysia Airlines plane, a Boeing 777 with 239 people on board Jalyn Holmes Jersey , continued to "ping" a satellite for a number of hours after the plane disappeared off radar early Saturday.

The signal came from the jet's "airplane health management system," or Aircraft Communication Addressing and Reporting System (ACARS), which provides a flow of data on the airliner's operations Brian O'Neill Jersey , said the report.

The newspaper later retracted one detail in its original report, which had incorrectly stated that U.S. investigators were looking at data automatically downloaded and sent to the ground from the plane's Rolls-Royce Trent engines.

"I've heard conflicting versions of exactly what the WSJ was reporting. That may have been the ADS-B system, Automatic Dependent Surveillance-Broadcast system Daniel Carlson Jersey , which sends a signal twice per second broadcasting the aircraft position and altitude," Bill Waldock, an expert on aviation accident investigation from U.S.-based Embry-Riddle Aeronautical University Mike Hughes Jersey , told Xinhua.

If the ADS-B was still working properly, air traffic control should have been able to track the aircraft within 150 to 200 miles (240 to 320 km) of land Jaleel Johnson Jersey , he said.

"The automatic feature periodically transmits 'bursts' of condensed system condition and function data Pat Elflein Jersey ," said the expert.

He said that before Air France Flight 447 crashed into the Atlantic on June 1, 2009, the French airline's maintenance headquarters received four bursts of such data.

"These indicated multiple system failures and the last indicated a loss of pressurization. The main problem is that the data in a single burst isn't time-sequenced Danielle Hunter Jersey , so it is difficult to determine the order in which they occurred," Waldock said.

"Most modern airliners have the system in various configurations Eric Kendricks Jersey ," he said.

RIO DE JANEIRO? April 26 (Xinhua) -- Brazil's sports minister Ricardo Leyser said Rio de Janeiro is on track to host the greatest ever Olympic Games? despite concerns about slow ticket sales and an ongoing political and economic crisis.

In an exclusive interview with Xinhua? Leyser vowed Rio would offer a "harmonious climate" that guaranteed a memorable experience for fans and athletes.

"Brazilians have endured many crises and we have always worked together to overcome our problems? guaranteeing that the country resumes its path toward economic growth and income distribution?" Leyser said.

"This will be no exception. The crisis will be overcome and the Olympics will take place in a harmonious climate with many records falling. Brazil will be well placed in the medals tally - in both the Olympics and Paralympics."

An impeachment process against President Dilma Rousseff and the country's worst recession in decades have led to fears of apathy among Brazilians towards the Olympics.

With 100 days to go before the opening ceremony at the Maracana stadium? about half of the 7.5 million Olympic tickets remain unsold.

But Leyser said interest from fans would improve as the Games drew nearer.

"There is still time for people to get excited about the Games?" he said. "The Olympics are a unique opportunity for people to see great sporting idols and have direct contact with sports that? despite being spectacular? don't attract a big audience.

"Brazil is starting to stand out in sports that are barely recognized by the (Brazilian) public. Rugby? badminton? handball? table tennis and hockey are good examples. The Paralympic Games also generate a lot of excitement for many people. Brazil has some great Paralympic medallists. One of them is (swimmer) Daniel Dias? the world's best Paralympian and a three-time winner of t. Odell Beckham Jr Jersey Myles Jack Jersey Authentic Mitchell Trubisky Jersey Authentic Minkah Fitzpatrick Jersey Le'Veon Bell Youth Jersey Lamar Jackson Kids Jersey Khalil Mack Kids Jersey Kareem Hunt Kids Jersey Julio Jones Kids Jersey JuJu Smith-Schuster Steelers Jersey

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