Jimbo2
Registered
Ohio volunteer firefighter killed while trying to drain air from alum 80, with non-functioning valve, after loosening PRD. Cylinder was not secured in a vise and HP air from PRD sent cylinder spinning uncontrollably into the engine bay. Valve was sheared off from impact with a wall at which time the cylinder became airborne glancing off a fire truck and then hitting the victim in the head. Fire department had purchased several used alum 80 cylinders and was getting them ready for new hydro-tests when accident happened.
https://www.cdc.gov/niosh/fire/pdfs/face201810.pdf