Divers retrieve crashed jet’s data recorder
Indonesia closing in on other black box
JAKARTA: Indonesian Navy divers retrieved one of the black boxes of the Sriwijaya Air’s Boeing jet that plunged into the Java Sea shortly after takeoff on Saturday, a key step in discovering what caused the aircraft carrying 62 people to crash.
Black boxes are crucial to understanding what happened as they capture sound in the cockpit and monitor flight data. The aircraft in this instance was a nearly 27-year-old 737-500, not the much newer Boeing 737 Max just emerging from a 20-month grounding. The Max was grounded globally after two crashes, including a Lion Air flight in October 2018 that also plummeted into Indonesia’s Java Sea.
Search teams retrieved the flight-data recorder on Tuesday and are seeking to get the other box soon, military chief Hadi Tjahjanto said in a news briefing. Their locator beacons were detected soon after the crash, and efforts to collect the flight recorders were hampered by muddy waters and debris from the jet scattered in the sea. The beacons on both boxes were dislodged by the force of impact.
The recorder appears to be a model capable of capturing 300 or more flight parameters, said James Cash, who was the US National Transportation Safety Board’s specialist on the devices before retiring.
Black boxes that have been submerged require special handling to dry out electronic components and it’s possible it may have suffered damage in the high-speed impact, Mr Cash said. But that rarely confounds investigators.
“I would say there’s a 99% chance they are going to get the data out of it,” he said.
Flight-data recorders monitor a plane’s track, flight-control movements by pilots and scores of readings showing how systems on the plane are functioning.
Divers are still searching for a second device that captures pilot communications and ambient sound from the cockpit. Despite being known as black boxes, they are painted bright orange to make them easy to spot in wreckage.
Indonesia is one of the world’s fastest-growing aviation markets, but also has one of the worst safety records. The country’s planes were barred by the European Union in 2007 over safety concerns. The ban wasn’t fully lifted until 2018.
The black boxes will provide more information on what caused the plane to plunge more than 10,000 feet (about 3,000 metres) in a matter of seconds. Both pilots in command of Sriwijaya Air Flight SJ182 were experienced and the airline has a solid safety record, with no fatal accidents since it was founded in 2003. The 737-500 model itself also has a good safety record.
Representatives from Boeing and the US NTSB will leave for Jakarta this week to help with the investigation, a person familiar with the matter said, asking not to be named because the matter is private. The Indonesian government has granted them a waiver to enter the country during its coronavirus-related travel ban.
Human remains collected from the crash site have been handed over for identification, along with 30 bags containing parts of the plane, search and rescue operation director Rasman MS said at a briefing on Tuesday. One victim was identified as 29-year-old Okky Bisma. Seven children and three infants were among the passengers.
Flight 182 was delayed for 56 minutes in Jakarta, according to FlightRadar24, as heavy rain lashed the Indonesian capital. Soekarno-Hatta International Airport’s official weather report about 10 minutes before the afternoon crash said there was light rain with a cloud ceiling starting at 1,800 feet.
Weather is known to be a contributing factor in several crashes in Indonesia.
Preliminary data appear to show the pilots were possibly disoriented, at least partly because of the bad weather, aviation analyst Gerry Soejatman said.
Sriwijaya Air started out as a carrier with just one Boeing 737-200, flying short routes from Jakarta. It now flies across the Indonesian archipelago as well as internationally to Timor-Leste and Penang in Malaysia. Flight 182 was headed to Pontianak on the island of Borneo.
Indonesia, with a population of about 270 million people spread over thousands of islands, is the world’s fifth-biggest aviation market in terms of scheduled capacity, according to OAG Aviation Worldwide.
The pandemic has squeezed the country’s airlines, as it has with others around the world, and domestic seat capacity is still 32% below pre-pandemic levels, OAG said.