TORONTO -- Iranian investigators are 鈥渢rying to do the right thing鈥� by providing Canadian officials with more information than would typically be allowed under international protocols during the investigation into the downing of Ukrainian Airlines Flight 752, according to the chair of the Transportation Safety Board.

鈥淲hat our investigators have said is that they believe the accident investigators from Iran are trying to do the right thing,鈥� TSB Chair Kathy Fox said during an interview on CTV鈥檚 Power Play, adding that the Iranian teams have been 鈥渧ery helpful and co-operative.鈥�

鈥淭hey are definitely following the international protocols and they鈥檙e pursing different lines of inquiry to find out what happened on that tragic day.鈥�

Fifty-seven Canadian citizens and 29 permanent residents were among the 176 people killed when an Iranian surface-to-air missile struck a Ukrainian aircraft over Tehran on Jan. 8.

Two Canadian air-crash investigators were deployed to Tehran. Fox said the investigators were given the opportunity to visit the crash site and view and examine the wreckage before travelling to Ukraine to meet with that country鈥檚 air accident investigation team.

鈥淭hey鈥檙e not necessarily giving us all the information, but they鈥檙e certainly giving more than we鈥檙e technically entitled to,鈥� Fox said.

Although the plane鈥檚 flight-data recorders remain in Iran, Fox said the TSB has been assured its investigators will be allowed to be present when the information is downloaded. However, it remains to be seen when and where that process may take place.

鈥淲e have been assured by the Iranian accident investigation bureau that we will have access,鈥� she said.

鈥淲e will be able to be present during the download and analysis, we just don鈥檛 know where or when. But we do hope that鈥檚 soon, because it鈥檚 very important to get that information.鈥�

TSB investigators are still fighting to play a bigger role in the probe, both to ensure the accuracy of the investigation and to improve transparency as questions of Iran鈥檚 trustworthiness linger.

鈥淚 think it would be beneficial for everybody if Canada -- given our expertise, our reputation for thorough and independent investigations -- could play a larger role in the investigation,鈥� Fox said.

鈥淚 think that would help a lot to maybe give a better perception in terms of the potential transparency, openness, and thoroughness of the investigation.鈥�

Fox noted that it remains to be seen what role Canada will play in the investigation after the flight-data information is downloaded.