On 29 October 2018, a Lion Air Boeing 737-MAX 8 crew had difficulty controlling the pitch of their aircraft after takeoff from Jakarta and after eventually losing control, a high speed sea impact followed. The Investigation found that similar problems had also affected the aircraft's previous flight following installation of a faulty angle-of-attack sensor and after an incomplete post-flight defect entry, rectification had not occurred. Loss of control occurred because the faulty sensor was the only data feed to an undisclosed automatic pitch down system, MCAS, which had been installed on the 737-MAX variant without recognition of its potential implications.