After lobbying by Ms Andrews and others, Air Force bosses confirmed in July an independent inquiry would take place.
It is understood Karen Clark, QC, will be announced tomorrow as the head of that inquiry.
The former deputy solicitor-general has a wealth of legal experience and was involved in the coronial inquest for those who died in the CTV Building and the Royal Commission of Inquiry into the Pike River Coal Mine tragedy.
Ms Clark has been asked to make recommendations which will have implications for the entire New Zealand Defence Force, it is understood.
Her inquiry will last up to six months.
Ms Andrews said she could not disclose the terms of reference on which Ms Clark's work would be based but confirmed victims had been consulted and were satisfied with its scope.
"It's been a process but it's been quite positive. They've listened," she said.
Ms Andrews, who was abused by her father from the age of 6, said she was not looking for a mea culpa from the Air Force.
"The thing is, they've already admitted they wronged us," she said. "Their inaction definitely helped him with his offending."
Even with Roper behind bars, the police's investigation into his behaviour continues.
