Fort Campbell in Kentucky had a QR 390 located in a building. One winter they had a heavy snowfall and the building collapsed under the weight of the snow. When they began to clear away the debris, they heard a noise—the 390 was still running!!
A direct quote from Ken McCooley Maintenance Manager IMD:
“We started to remove pieces of the building and we could hear the compressor running underneath the debris. We had to stop what we were doing and find a way to disconnect the power to the building to shut off the unit. That’s one of the toughest pieces of equipment I’ve ever seen, and as far as I know is still in operation.”