Visual checks and inspections had not led to questions about the structural integrity of the viaduct.
Metallurgical inspection by the safety board led to the conclusions of why the part broke, and these details have been known for nearly a year.
That inspection led to a record $9.5 million fine that the aviation agency imposed on the carrier.
Critics charged that the inspections would lead to invasions of privacy and intimidation.
One such inspection led to a decision on Thursday to close an additional 1,000 feet of waterfront pedestrian space nearby for repairs.
A further inspection led to the decision that the school required special measures.
Indeed, his own inspection of the place had led him to the same conclusion.
An inspection often leads to several thousand dollars worth of repairs.
But often, the inspections do not lead to lasting repairs.
School across the country claim the inspections are leading to unfair judgements.