The pilot of the missing plane, Zaharie Ahmad Shah.
A US Navy official says four acoustic pings at the centre
of the search for missing Malaysia Airlines Flight MH370, which
disappeared in March, are no longer believed to be from the
aircraft's black boxes, according to a report by CNN.
Australian search authorities narrowed the search for the
missing jet last month after picking up a series of pings
near where analysis of satellite data put the last location
of the Boeing 777, some 1600 km off Australia's northwest
CNN said authorities now almost universally believe the pings
did not come from the onboard data or cockpit voice
recorders, but instead came from some other man-made source
unrelated to the jetliner that disappeared on March 8,
according to Michael Dean, the U.S. Navy's deputy director of
"Our best theory at this point is that (the pings were)
likely some sound produced by the ship ... or within the
electronics of the Towed Pinger Locator," Dean said.
The discovery of the pings on April 5 and 8 was hailed as a
significant breakthrough but no further promising signals
were heard before the expiry of the batteries on the black
boxes' locator beacons.
A scan of the area around the pings with an unnamed submarine
failed to find any sign of wreckage and no debris linked to
the plane has ever been picked up despite the most extensive
and expensive search effort in aviation history.
Australian authorities leading the search did not immediately
respond to requests for comment.
MH370 was carrying 227 passengers and 12 crew when it
vanished on March 8. Authorities have not ruled out
mechanical problems as a cause but say the evidence,
including the loss of communications, suggests it was
deliberately diverted thousands of kilometres from its
scheduled route from Kuala Lumpur to Beijing.