Interesting article about the accident and I pulled the quote below which if true is scary!! Something a lawyer in the US would love.
"Expoland said it disassembled the coasters on the ride in annual detailed inspections normally held in February. But this year, it did not disassemble them — and the axle went unchecked — because it could not find sufficient work space, the operator said.
The axle was not among the parts checked in regular daily or monthly inspections and had not been serviced since February 2006. The operator said the axle had not been replaced since the roller coaster was introduced in March 1992."