Originally posted by the Voice of America. Voice of America content is produced by the Voice of America, a United States federal government-sponsored entity, and is in the public domain. Iran: 'Human Error' Caused Ukraine Crash VOA News Iran claims "human error" was responsible for the downing of a Ukrainian passenger plane earlier this year that killed all 176 people on board. The Iranian Civil Aviation authority said late Saturday, "A failure occurred due to a human error in following the procedure" for aligning the radar. The misalignment caused a "107-degree error" in the system, Iran said. On the same night of the plane downing, Iran had launched a ballistic missile attack targeting U.S. soldiers in Iran. The attack was in response to the killing of one of Iran's top generals in a U.S. missile strike in Iraq. .