A Dreamworld electrical supervisor says he would have inspected the Thunder River Rapids ride himself if he was told of a second malfunction the day four guests died.
Cindy Low, Kate Goodchild, her brother Luke Dorsett and his partner Roozi Araghi all died when one of the water pumps on the attraction malfunctioned in October 2016, leading to a collision between two rafts.
It was the third time the pump had malfunctioned that day.
Electrical supervisor Scott Ritchie has told an inquest into the deaths he had only been told of one of the breakdowns on the morning of the tragedy.
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"Had I been aware of the second trip, I believe I may have taken action," he told Southport Coroners Court on Wednesday.
The inquest was shown a police walk-through with Mr Ritchie after the tragedy where he appeared uncertain about the exact function of an emergency stop button on the ride's main control panel.
He said he was aware of the function of the button but at the time of the walk-through was under stress and had been confused.
Barrister Steven Whybrow, representing family of Ms Goodchild and Mr Dorsett, said it was likely ride operators, during an emergency situation, were also likely to forget the function of buttons due to stress.
"Fair statement," Mr Ritchie said.
Mr Ritchie agreed the only button which brought the ride's conveyor to an immediate halt was near its unload area.
The inquest was also shown a document in which Mr Ritchie warned staff after the ride was left running with no-one on it in February 2016.
"It was a safety incident but I would not say it was serious," Mr Ritchie said.
The inquest continues.
