Most of the startled concert-goers thought they were hearing fireworks or perhaps some kind of sound equipment malfunction.

It was the first official confirmation that the authorities had known since the submarine dis-appeared that it was facing an equipment malfunction.

Oxygen toxicity has now become a rare occurrence other than when caused by equipment malfunction and human error.

Prior to the show, an equipment malfunction caused damage to the top of the stage and some of the lighting.

Process safety involves, for example, the prevention of leaks, spills, equipment malfunction, over-pressures, over-temperatures, corrosion, metal fatigue and other similar conditions.