Possible 5th signal detected in search for MH370 black boxes

[PERTH] Searchers engaged in a race against time to pinpoint "pings" from the missing Malaysian airliner's black boxes yesterday detected a possible fifth signal, fuelling hopes that wreckage will soon be found.

The beacons on flight MH370's data and cockpit voice recorders are due to fade, more than a month after the Boeing 777 vanished. So the Australian-led search is racing to determine an exact location before sending down a submersible to plumb the Indian Ocean depths.

The Perth-based Joint Agency Coordination Centre (JACC) said that the latest ping was detected yesterday afternoon by an Australian air force P-3C Orion surveillance plane, which has been dropping dozens of sonar buoys into the remote wat…