1 WTC scaffold incident possibly caused by mechanical problem

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GREENWICH VILLAGE (PIX11) --  What went wrong? Nick Montesano is not the only one asking this question.

In fact, many are making the same inquiry as the Port Authority along with other entities investigate exactly what led to Wednesday's urban cliffhanger in the sky.

Nick Montesano of DTM Elevated Consulting decided meet with PIX11 News at the base of the tower on Thursday where he pointed out, "Normally when you see something like this it could be the cable, it could be the connection of the cable to the basket itself, it could be something up in the machinery."

Montesano added that he did not think human error was a factor. "These workers are trained, in their safety procedures they go through this, renewals on their training, so it would be very uncommon for them to be able to cause that kind of damage to this piece of equipment."

Montesano has consulted on elevators and window-washing scaffolds for 33 years. He wasn't the only one surprised that an accident like this happened so soon.

Lou Ricca is OSHA's former Deputy Administrator in the New York region. "You would expect that a manufactured scaffold system like that would be in top notch safe."

Over a span of 28 years, Ricca garnered extensive experience in examining work place accidents. This one raised his eyebrows due to the age of the building. "Well it's always surprising when you have new equipment such as this that fails. It brings into question, it's usually more the maintenance issue, but this is brand new. So I'm sure they are going spend more effort looking at the installation and the approvals of it."

Meanwhile in a call to Tractel, the company that manufactured the window-washing rig, an employee in administration told PIX11 News, "We have no comment at this time with regards to what you are calling about."

In June of 2013, Tractel was involved in another scaffolding accident at the Hearst building in Times Square. No one was injured in that incident, but in December of 2007 two brothers plunged 47 stories on the Upper East Side when their rig collapsed. Alcides Moreno survived the crash and while Tractel was fined $21,000 for the incident, Moreno reportedly settled his multi-million dollar lawsuit.

PIX11 News' calls to Moreno's residence in Arizona went unanswered.

Late Thursday afternoon, the union representing the two workers announced that the two will be speaking about Wednesday's accident at a news conference Friday morning.