She's gone and CPR won't help: rider's mum

Nothing could have saved a talented young woman crushed during a NSW equestrian event, but what happened afterwards points to what could be done to save others, an inquest has heard.

Ailsa Carr was watching her daughter, Caitlyn Fischer, compete in a cross country riding event in Sydney in April 2016 when her horse hit a jump and did a "somersault".

The 19-year-old died immediately from a blunt force head injury after the horse, Ralphie, landed on her when the pair tumbled.

"I looked at Caitlyn and the injuries she had and I knew that she was dead and that there was nothing I could do apart from be there as her mother," Ms Carr told the NSW Coroners Court on Tuesday.

Ms Carr was the first person on the scene and, realising her daughter was gone, phoned her husband, Mark, while kneeling beside Caitlyn's body.

"My first words to him were that Caitlyn was dead, that she was gone," she told the inquest.

The phone call lasted 34 seconds and ended when two first responders arrived and began to remove Caitlyn's protective gear so they could perform CPR.

"I started to feel that I was really alone. I needed to talk to Mark. I needed to have someone with me," Ms Carr said, explaining she'd rung her husband back but had ended that call too as the CPR began.

"I begged them to stop. I said 'I am a nurse, I am Caitlyn's mother, please stop this'," she said.

"She had catastrophic head injuries and I just wanted to hold her."

The death came just weeks after 17-year-old Olivia Inglis was similarly killed during a March 2016 eventing competition in NSW's Hunter region.

Deputy state coroner Derek Lee is examining the circumstances surrounding both tragedies in a two-week inquest at the coroners court at Lidcombe.

The inquest on Tuesday heard it took at least six minutes after Caitlyn's accident for an ambulance to arrive.

Volunteer jump judge Sarah Retallack - one of the closest people to the fall - revealed she hadn't received first aid training.

Ms Retallack said no one verbally responded by radio to her three calls for assistance although she admitted to experiencing "huge shock".

Ms Carr says ensuring judges have first aid training could help save lives.

"There is no single thing that will make cross country absolutely safe," she said.

"(But) if the jump judge has got to be there for eight minutes by themselves ... they need to be prepared in how to respond to a situation."

Ms Carr told the inquest she was unhappy with Equestrian Australia's review of her daughter's death.

She said two men from EA had met with her and her husband but the discussion lasted only two hours and the representatives didn't take notes.

"We felt it had been a complete and utter waste of time," she said.

Even more "alarming" to the grieving parents was the first report into their daughter's death had "many errors".