Investigators revealed that eight minutes after the last complete transmission from Malaysia Airlines Flight 370, there was a "partial ping" from the missing aircraft that could help investigators unravel what happened to the missing jet before it stopped flying.
The final partial transmission from the missing Boeing , which disappeared from civilian radar on March 8, "originates with the aircraft for reasons not understood," said Chris McLaughlin, senior vice president of Inmarsat PLC, which operates the satellite.
The company is investigating the partial ping - or digital handshake between the jet and the satellite - as "a failed login" to its satellite network or as "potential attempt by the system [aboard the aircraft] to reset itself," Mr. McLaughlin said.
The partial ping could have several possible explanations, he added, but that human interaction with the satellite communications system had been ruled out.
"We're not looking at this [partial ping] as someone trying to turn on the system and communicate," he said.
The partial ping is the latest in a series of clues that have presented new questions for investigators as they try to piece together what happened to the missing aircraft and the 239 people aboard.
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