AirAsia crash investigation: In their first public report, Indonesian investigators did not pinpoint a single underlying reason why flight QZ8501 disappeared from the radar, but set out a sequence spotlighting the faulty component, maintenance lapses and crew actions. "There was a chain of events, starting with a broken (part), how it was handled and then after it was handled what the consequences were and how the pilot handled it. It's difficult for me to say what the main cause was," National Transportation Safety Committee (NTSC) investigator Nurcahyo Utomo said. Bad weather did not play a role.
Caption: An Airbus investigator walks near part of the tail of the AirAsia QZ8501 passenger plane in Kumai Port, near Pangkalan Bun, Central Kalimantan in this January 12, 2015 file photo. Indonesian investigators said on December 1, 2015 that a chronically faulty component and the crew's attempt to fix the problem were among the factors that contributed to the crash of an AirAsia passenger jet last year, killing all 162 aboard. (Reuters)