The Interstate Aviation Committee (MAK) has sent Poland its final report on the plane crash that killed then Polish President Lech Kaczynski.
The Tu-154 that crashed in April 2010 near the western Russian city of Smolensk was carrying Kaczynski and other senior Polish officials to a ceremony to honor Polish officers killed by Soviet secret police in 1940.
The details of the investigation, which were criticized by Polish Prime Minister Donald Tusk in December, are expected to be revealed at a press conference in Moscow later on Wednesday.
Russian investigators first submitted the report on October 20. The conclusions named 'pilot error' as the main reason for the deadly crash, which killed 96 people.
Tusk sent the report back with 150 comments and suggestions which require further study. He described the investigation as "unacceptable," saying that some of the conclusions it had made were "without foundation."
Polish cabinet spokesman Pawel Gras said Tusk would not cut short his holiday in the Italian Dolomites to read the report.
Poland's leading investigator, Edmund Klich, said he doubted all of Poland's comments on the report had been adopted by the Russian side, since they would have taken weeks to consider and were only handed over in mid-December.
Polish experts earlier said they were dissatisfied with the documents provided by Russia. Most of the complaints concerned a lack of technical details about the Severny airport in Smolensk at which the plane was to land.
Klich said there are 150 separate remarks to the Russian conclusions which required additional evidence and study. "I suspect Russia has not done this," he told the PAP agency.
A spokesman for MAK dismissed the claims, saying that the Russian commission had had a total of 24 days to study the remarks made by the Polish side. He also said the Russian experts even worked through the New Year holidays to prepare the report.
After the report is handed over to Poland, it will be studied by Polish Interior Minister Jerzy Miller. The Polish commission is later expected to voice its position on the conclusions made in the report.
MOSCOW, January 12 (RIA Novosti)
