The crew was at fault in a Polish plane crash that killed the country's president and nearly 100 other people last April, a Russian-led investigation found Wednesday.
The crew should have decided to divert to another airport in light of "repeated and timely" warnings about bad weather in Smolensk, Russia, the Interstate Aviation Committee concluded.
The presence of a Polish Air Force commander in the cockpit may also have contributed to the crash, the IAC said, noting that he had alcohol in his blood at the time of the crash.
Polish President Lech Kaczynski, his wife, and many top Polish officials died in the crash as they headed to a memorial service to mark a World War II massacre.
The crew of the Polish presidential plane was under psychological pressure to land the plane at Smolensk, fearing Kaczynski would react negatively to a decision to divert the plane, IAC chair Tatyana Anodina said.