The crew of the Polish presidential jet that crashed in Russia last year were not informed of the weather conditions before takeoff, the Interstate Aviation Committee (MAK) said on Wednesday, RIA Novosti reported.
Then Polish President Lech Kaczynski and 95 other top officials died in the April 10 crash.
"There were serious flaws where the preparation of the crew, control over the flight and a choice of alternative airports were concerned," MAK head Tatyana Anodina said.
She said the crew did not have "factual and actual" information about the weather conditions near Smolensk.