Fatal ORNGE crash report to be released by Transportation Safety Board

The Transportation Safety Board is expected to release its long-awaited report Wednesday morning on the Ornge air ambulance crash that killed two pilots and two paramedics flying out of Moosonee more than three years ago.

• 4 Ornge helicopter crash victims ID'd as from Ontario, Quebec

The crew was on its way to pick up a patient on theAttawapiskat First Nationin northern Ontariowhen thehelicopter they were traveling incrashed one kilometre from an airport in Moosonee, Ont.,shortly after taking off in the early morning hoursofMay 31, 2013 .

The TSB will be addressing the media Wednesday morning at the Sheraton Centre Toronto Hotel to reveal the findingsof itsinvestigation into the crash.

The Federal Ministry of Labour laid 17 charges against the Ontario air ambulance service in a separate investigation on May 30, 2014, exactly one day before the one-year anniversary of the crash.

• Ornge, Ontario's air ambulance service, faces 17 labour code charges

Acourt document obtained by CBC News revealed that many of the charges related directly to sections of the Canada Labour Code that governpilots with little experience operating aircraft together.

The document allegesthat Ornge permitted the pilots to fly the S-76A helicopter "without adequate training in theoperation of that specific aircraft," failed to provide the pilots with "a means to enable them to maintain visual reference while operating at night," and that Donald Mark Filliter, the crew's captain, had "insufficient experience in night operations."

In November 2013,investigators fromTransport Canada also handed down sevendirections to Orngefollowing its investigation into the Moosonee crash.

• Orngedidn't protect health, safety of pilots: federal investigators

Federal investigators saidOrnge failed to adequately educate its pilots onthe health and safety hazards associated with northern operations, among other problems.