Excellent break down provided. Very well done.
The whole report is like a textbook of how not to maintain safe operational control of a theme park.
I got to about page 180 of the report before i needed a break. Its hard reading, frustrating, makes you angry, makes you mad. Its really all over the place with the complete almost cascading like failure through just about all levels of management.
Its literally like a bunch of these people got together and collectively decided nobody told them how to do their jobs, so that absolves them of any responsibility. We will just pretend theres nothing to address.
Thats before you get to the actual findings on the ride which basically reduce it down to a few things;
Water level. Lack of automated monitoring of water level tied into a safety system that would halt the ride when water level drops below a safe level.
Lack of a single dedicated estop that halts all operation and a complex stop proceedure.
Gap between conveyor and axle to the supporting rails in the trough was an issue and should have been picked up by any competent engineer.
Gaps between slats on conveyor.
Staff training, competency and understanding of ride operation, largely due to inadequate operational proceedures all staff should base their training upon.
A number of upgrades were proposed that would improve operational safety. It was noted in particular that the lack of warning or automated stoppage due to water level dropping after pump failure was a direct contributor to the deaths. The danger was highlighted with previous incidents, including the last incident that lead to an operators dismissal. At no stage were these issues improved upon or addressed to prevent similar breakdown in operation of the ride both at a mechanical and operations (staff) level. On top of that, these failings were not shared with other staff and a number of managers had no knowledge of previous incidents.
There was really, really disturbing insight into the lack of documentation, error reporting and compliance that existed in most departments which was highlighted by a number of independant auditors, even when not tasked with actual ride investigation. Poor implementation of recommendations and lack of improvement were noted, though big improvements had been made in the lead up to the accident.
Basically, the short short version of what happened on the day is stuff went wrong. A Combination of existing design, uncontrolled modification, faults during operation and operation of the ride on the day contributed to the deaths. There was enough opportunity to address a number of issues which would have reduced risk or completely prevented the deaths from occuring. None of these actions were taken by ardent or park management and directly contributed to the deaths.