Friday, November 09, 2018

Lion Air: Sensor was replaced day before crash but problems persisted

Problems were reported on a Lion Air jet that crashed into the sea off Jakarta even after technicians replaced a sensor on board the aircraft, investigators said.
Indonesian authorities confirmed Wednesday that the angle of attack (AOA) sensor was replaced after a flight from Manado, in North Sulawesi to Denpasar, Bali on October 28. The Boeing 737 MAX 8 then made another flight to Jakarta that same day, and the pilots reported further problems.
All 189 people on board Flight 610 died when the new Boeing 737 MAX 8 crashed into the sea on October 29, 13 minutes after taking off from Jakarta on a short flight to Pangkal Pinang on the Indonesian island of Bangka.
Investigators said the jet experienced problems on its last four flights -- including, crucially, the flight that crashed, according to Soerjanto Tjahjono, the head of the National Transportation Safety Committee (KNKT).
Boeing released an operational bulletin on Wednesday, warning all airlines about how to address any erroneous readings related to the AOA sensor. The Federal Aviation Administration (FAA) later issued its own directive that advised pilots about how to respond to similar problems.
Almost two weeks after the crash, authorities are still searching for the plane's cockpit voice recorder (CVR), which is believed to be buried under deep mud. If found, it should reveal what happened in the cockpit in the final seconds of the flight.
Investigators are already examining the flight data recorder that was pulled off the sea bed, some 30 meters under water, on November 1.
A wallet is seen in the water where the plane went down.
09/11/18 Helen Regan and Masrur Jamaluddin/CNN

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