KUALA LUMPUR - Even if searchers are able to miraculously pluck Malaysia Airlines flight 370's "black box" from the depths of the vast Indian Ocean, experts say it may not solve one of aviation's greatest mysteries.
Planes, ships and state-of-the-art tracking equipment are hunting for any trace of the passenger jet, which Malaysia said crashed in the forbidding waters after veering far from its intended course.
They face a huge challenge locating the Boeing 777's "black box", which holds vital clues to determining what caused the plane to vanish after it took off from Kuala Lumpur en route to Beijing on March 8.
But experts believe the flight data recorder and cockpit voice recorder may not yield answers on the riddle of how and why the plane diverted an hour into the flight, and embarked on a baffling journey to the southern reaches of the Indian Ocean.
The data recorder details the aircraft's path and other mechanical information for the flight's duration, and "should provide a wealth of information", US-based aviation consultancy firm Leeham Co said in a commentary.
But the cockpit voice recorder -- which could reveal what decisions were made by those at the helm and why -- retains only the last two hours of conversations before the plane's demise.
That means potentially crucial exchanges surrounding the initial diversion, which took place halfway between Malaysia and Vietnam, will be lost.
"Clearly, it won't reveal anything that happened over the Gulf of Thailand -- this will have been overwritten by the end of MH370," it said.
Leeham added that it also remains to be seen whether the cockpit recorder will contain anything pertinent about the plane's final two hours, when it is believed to have either ditched or run out of fuel.
Malaysian Prime Minister Najib Razak said Monday that Flight MH370 had gone down in the Indian Ocean with its 239 passengers and crew, citing new satellite data analysis.
But its exact location and the circumstances of its diversion remain a mystery. No distress signal was ever received.
Three scenarios have gained particular traction: hijacking, pilot sabotage, or a sudden mid-air crisis that incapacitated flight crew and left the plane to fly on auto-pilot for several hours until it ran out of fuel.