The federal government has been ordered to hand over an investigation into the Whitsundays, in north Queensland, a helicopter crash that killed four Australian Defence Force (ADF) airmen during a military exercise.
Crash During Talisman Sabre
The tragedy occurred on the evening of July 28, 2023, during Talisman Sabre, the largest joint military exercise between Australia and the United States.Captain Danniel Lyon, Corporal Alexander Naggs, Warrant Officer Class 2 Phillip Laycock, and Lieutenant Maxwell Nugent were flying an MRH-90 helicopter, also known as a Taipan, with the callsign “Bushman 83,” on a routine mission to pick up soldiers from Lindeman Island, south of Hamilton Island, when the aircraft plunged into the ocean.
Despite heavy rain close to the threshold for cancelling the mission, the crew was cleared for a new flight plan.
The helicopter was one of four flying in formation when it suddenly climbed and then nosedived into the water.
As soon as it was light the next day, hundreds of ADF and emergency services personnel searched the area for the four men.
By day three, the army announced it had become a recovery mission. The search effort lasted three months.
Safety Concerns Raised

Since the tragedy, multiple inquiries have been held, including by the Inspector-General of the Australian Defence Force.
Whistleblowers told the inquiry they had expressed serious concerns about the TopOwl helmet-mounted visor, which they believed would cost lives because they tended to display serious inconsistencies when compared with real readings.
A sleep expert also gave evidence that the men were working under hazardous levels of fatigue, sleeping during the day in hot tents next to a busy airport and fire station.
Senate Motion
Senator Roberts said families had been left “bewildered” by the Commonwealth Director of Public Prosecutions’ (CDPP) decision not to lay charges against Defence despite Comcare’s findings.“When four airmen die, there must be transparency if the government wants confidence in the decision not to prosecute,” Senator Roberts said.
“Their sons, brothers, and partners put their life on the line for this country, so they deserve answers and transparency.”
His motion succeeded in compelling the release of Comcare’s evidence brief and investigations, but senators voted down his push for the CDPP to release its reasons for not prosecuting.
That would have forced disclosure of internal assessments, legal advice, correspondence, including all written and digital records of interaction. Coalition and Labor senators opposed the move, arguing it would breach long-standing legal privilege.

Labor’s Anthony Chisholm said it was not appropriate to release the material while families had formally asked the CDPP to review its decision.
“We remember the lives, dedication, and spirit of [the four men,]” Senator Chisholm said.
“[But] the decision to prosecute lies with the Commonwealth Director of Public Prosecutions, which is an independent statutory agency.”
Families Seeking Answers
The soldiers’ families have been pressing for greater transparency, saying the lack of charges has left them without accountability.Roberts said he hoped the release of Comcare’s report would help them find peace.
“I call on the government to comply with the order in full,” he said.







