The article appears to be mostly accurate in its presentation of the events and statements concerning the plane crash. It reports on President Aliyev's accusations and the response from Russian President Putin, which are verifiable through the cited state news agencies like AZERTAC. The mention of the preliminary investigation and the involvement of international experts in analyzing the flight data adds credibility to the claims. However, there are details, such as the exact cause of the crash, that remain unconfirmed, notably the potential shrapnel damage, which lowers the accuracy score slightly. The lack of independent verification of the claims made by Azerbaijani and Russian officials also suggests the need for more corroborative evidence.

The article predominantly presents the Azerbaijani perspective, particularly focusing on President Aliyev's accusations against Russia. While it does mention Putin's response and the Russian investigation, these are brief and lack depth compared to the detailed account of Aliyev's statements. There is an evident imbalance as the article does not explore other potential perspectives or expert opinions that could provide a more nuanced view of the situation. This one-sidedness may lead readers to perceive a bias towards the Azerbaijani narrative, and the article could improve by including more diverse viewpoints, such as independent aviation experts or additional insights from Russian officials.

The article is well-structured and clearly presents the sequence of events and key statements from involved parties. The language is straightforward and professional, allowing readers to easily follow the narrative. The decision to include direct quotes from President Aliyev and references to official statements adds to the clarity. There are no significant instances of emotive language, and the tone remains neutral throughout. However, some complex aspects, such as the technical analysis of the crash data, could be elaborated further to enhance understanding. Overall, the article maintains a high level of clarity, making it accessible to a broad audience.

The article cites several official sources, including Azerbaijan's state news agency AZERTAC and the Kazakh government, which are generally reliable for official statements. However, the reliance on these sources without additional independent or third-party verification raises questions about the overall quality and impartiality of the information. While Reuters is mentioned in relation to the analysis of flight recorders, more independent sources or expert commentary could bolster the article's credibility. The lack of diverse sources and potential over-reliance on state-controlled media may affect the perceived reliability of the article's content.

The article demonstrates a good level of transparency by detailing the investigation processes and the involvement of international experts in analyzing the flight data. It also outlines the cooperation between Kazakhstan and Azerbaijan, providing readers with a sense of the efforts towards ensuring a credible investigation. The mention of the criminal case opened by Russia's investigative committee adds to the transparency, showing that multiple parties are involved in addressing the tragedy. However, the article could improve by disclosing more about the potential biases or affiliations of the sources cited, particularly in the context of the geopolitical tensions between Azerbaijan and Russia.