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Finding the black box
With the confirmed discovery of the tail section of AirAsia QZ8501, hopes are high that the discovery of the black box is imminent.
This is the section of the plane in which the black box would have been installed, along with flight data recorders.
Some 95 divers will be dispatched to the wreck, most likely on Thursday, to begin efforts to retrieve it.
As yet, the pings from the black box’s locator beacon have not been detected, possibly due to muddy waters obstructing the signal.
The beacons should not stop pinging for 30 days.
Five ships have been deployed with equipment capable of detecting the black box, including vessels assisted by Britain and France.
Authorities said Russian amphibious aircraft have detected some signals but these are believed to be from the vessels in the search zone.
The next step after finding the black box will be to obtain its data.
This is usually a fairly quick process and can be completed almost instantly, as long as the flight data recorders have not been damaged by water or fire.
Decoding and interpreting the data can take days or weeks, though the results may not be made public for some time.
Five ships have been deployed with equipment capable of detecting the black box, including vessels assisted by Britain and France.
Authorities said Russian amphibious aircraft have detected some signals but these are believed to be from the vessels in the search zone.
The next step after finding the black box will be to obtain its data.
This is usually a fairly quick process and can be completed almost instantly, as long as the flight data recorders have not been damaged by water or fire.
Decoding and interpreting the data can take days or weeks, though the results may not be made public for some time.
AirAsia plane's tail may be lifted to retrieve black
boxes Relatives lay flowers on the coffin of victims of AirAsia Flight 8501 Yongki Jou and his son Brian Youvito Jou, during their cremation procession in Surabaya, East Java, Indonesia, Thursday, Jan. 8, 2015. Divers were hoping to zero in on the flight's black boxes Thursday, after search and recovery operations got a much-needed boost with the discovery of a chunk of the plane's tail - nearly two weeks after it plummeted into the sea, killing everyone onboard. (Trisnadi/Associated Press) PANGKALAN BUN, Indonesia - Strong currents and blinding silt thwarted divers' attempt on Thursday to find AirAsia Flight 8501's black boxes, which are believed to still be in the recently discovered tail of the crashed plane. The flight data and cockpit voice recorders are crucial to helping determine what caused the jet carrying 162 passengers and crew to vanish on Dec. 28, halfway into a two-hour flight between Surabaya, Indonesia, and Singapore. Three more bodies recovered Thursday raised the total to 43, said Suryadi B. Surpiyadi, a search and rescue operation coordinator. Days after sonar detected what appeared to be chunks of wreckage on the sea floor, an unmanned underwater vehicle Wednesday zoomed in on the plane's tail, lying upside down and partially buried in the ocean floor. Divers took advantage of a brief break in weather Thursday to try to locate the black boxes, but they were unable to make it past currents and 1-meter (3-foot) visibility, said National Search and Rescue chief Henry Bambang Soelistyo. He said expert teams from Indonesia and France were looking at other options, including a crane to lift the tail. Ping-emitting beacons in the black boxes still have about 20 days of battery life, but high waves had prevented the deployment of ping locators, which are dragged by ships. Six ships with ping locators were in the search area in the Java Sea, said Nurcahyo Utomo, an investigator of the National Commission for Transportation Safety. But he said that based on pictures taken by the divers, he believed that the black boxes were still attached to their original location in the plane's tail. "Once detected, we will try to find and lift up the black boxes as soon as possible," he said. Officials are hopeful many of the 119 bodies still unaccounted for will be found inside the fuselage, which is thought to be lying near the tail. It's not clear what caused the plane to crash, but bad weather is believed to be a contributing factor. Just before losing contact, the pilot told air traffic control he was approaching threatening clouds, but was denied permission to climb to a higher altitude because of heavy air traffic. No distress signal was issued. http://www.washingtonpost.com/business/divers-looking-for-black-boxes-in-crashed-airasia-plane/2015/01/07/1e996da8-96d8-11e4-8385-866293322c2f_story.html |
Divers search wreckage of AirAsia jet's tail for black
boxes (Reuters) - Scores of divers plunged into the Java Sea on Thursday to search the wreckage of an AirAsia jet for the black box recorders that could reveal why the plane crashed, Indonesia's search and rescue agency said. Flight QZ8501 vanished from radar screens over the northern Java Sea on Dec. 28, less than half-way into a two-hour flight from Indonesia's second-biggest city of Surabaya to Singapore. There were no survivors among the 162 people on board. The cause of the crash remains a mystery, with hopes centering on the so-called black boxes - the flight data recorder and the cockpit voice recorder - providing vital clues. The plane which crashed was an Airbus A320-200, which carries the recorders near the tail section. The tail of the plane was found on Wednesday, upturned on the sea bed about 30 km (20 miles) from the plane's last known location at a depth of around 28-32 meters. "After we found the tail, our plan is to do everything step by step," Fransiskus Bambang Soelistyo, head of the search and rescue agency, told a news conference in Jakarta. "First we will (check whether) the black box is still at its place, in the tail, or if it has detached." A total of 84 divers are in ships in the vicinity and teams began searching the jet's tail at 0645 local time (6.45 p.m. EST), with visibility poor and strong currents still impeding efforts, Soelistyo added. Should diving teams confirm the location of the recorders, the tail will probably be plucked out of the sea using a crane capable of lifting 70 tonnes. Ships with acoustic "pinger locators" designed to pick up signals from the black boxes were at the location but were no longer being used, in a possible sign of confidence among Indonesian officials that the recorders will be found soon. Two Japanese ships that were part of the international effort to find the plane would now leave the mission on Friday, Soelistyo added. "Now that the tail is confirmed, we are confident," Mardjono Siswosuwarno, the main investigator of the National Transportation Safety Committee, told Reuters late on Wednesday. "In my opinion, the pinger locators are no longer necessary to finding the black box." Forty bodies and debris from the plane have been plucked from the surface of the waters off Borneo, but strong winds and high waves have been hampering divers' efforts to reach larger pieces of suspected wreckage detected by sonar on the sea floor. In Pangkalan Bun, the southern Borneo town closest to the crash site, Indonesian armed forces chief Moeldoko said he would personally lead any mission to lift the jet's tail. Weather agency officials warned on Thursday that although weather conditions at search areas had improved over the last two days, it was likely to worsen from Friday onwards. Indonesia AirAsia, 49 percent owned by Malaysia-based AirAsia budget group, has come under pressure from the authorities in Jakarta since the crash. The transport ministry has suspended the carrier's Surabaya-Singapore license, saying it only had permission to fly the route on Mondays, Tuesdays, Thursdays and Saturdays. Flight QZ8501 took off on a Sunday, though the ministry said this had no bearing on the accident. AirAsia has said it is cooperating fully with the ministry's investigations. That investigation would be completed by Friday evening, the transport ministry said. |
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