Lorraine Doyle, 35, spoke of her heartache at sitting through six weeks of evidence and said her and her family have never been able to properly grieve the death of her father Raymond Doyle.
Raymond, who was 57, was one of 16 men who died when the Bond-operated Super Puma crashed into the North Sea in 2009.
The Doyle family, from Cumbernauld, North Lanarkshire, sat through every day of the six-week fatal accident inquiry into the crash.
And as the FAI report was released, Lorraine told the Evening Times it revealed nothing that they didn't already know.
She said: "We knew this already. From day one we knew the crash could have, should have, been avoided.
"Helicopters don't simply fall out of the sky. What was very frustrating for us throughout the FAI was how many witnesses said they simply couldn't remember when asked to give evidence.
"That was heartbreaking. It was total negligence that caused the crash. If Bond had followed proper procedure, my dad would still be alive today.
"Two-and-a-half years after the crash the UK Air Accidents Investigation Branch told us the crash could have been avoided, so we knew this all along.
"We were, and still are, upset and surprised that the advocate recommended an FAI rather than a prosecution and we will have to live with that forever.
"Our loved ones went to work one day and never came home, and the people responsible still haven't been properly held to account."
Lorraine was joined at the FAI and the release of yesterday's report by her mum Wilma, her sister Caroline and Raymond's brother, Tony.
While some of the family's questions were answered in the course of the FAI, she says many more remain. She said: "This isn't really proper closure for the 16 families. All the families have been made to wait five years for this outcome, and it's not the outcome that can allow us to move on.
"We've never really had the time to grieve my dad's death because the investigation and FAI were always going on.
"But without satisfactory closure, we still can't properly grieve and try remember my dad in the way we'd like to.
"To find out the crash should have been avoided is very upsetting, but it is not really closure."