In the end, the problem was small. So small that it never would have been discovered if you had not contracted with a 3D laser scanning service. It turns out that some very small screws were cracked in the large cooling system blowers that were located in every rental unit. The problem, however, seemed too common to ignore.
It just did not seem likely that all so many of the units would have started to fail within the same few weeks. The units, of course, were no longer covered by warranty and you feared that you would be faced with expensive replacement costs. Instead, a repairman suggested that you remove one unit and send it in for NDT testing. And, that testing indicated that there was indeed a faulty