Overview

• Engineers cited by RTP and Expresso note the haulage rope was replaced six years ago with a design using six steel strands around a fiber core.
• The experts propose the fiber core may have deformed and lost volume over time, allowing the rope assembly to separate from the carriage under vibration and heat.
• They also point to reports of excessive oil on the rails that could have impaired the braking system.
• The downhill car derailed on September 3 on Calçada da Glória, leaving 16 dead and 21 injured after striking poles and a building, and the onboard brakeman was among the victims.
• These explanations draw on an initial commission report, with specifications noting a 32 mm rope rated for about 68 tonnes, while a fuller GPIAAF analysis is expected in over a month.