In addition, the pressure in the bottle or tire-servicing cart can be as high as 3,000 psi.

Causes of wheel/tire assembly explosions.Īirplane wheel/tire assemblies are inflated to high pressures (many in excess of 200 psi).

These types of injuries may be prevented by understanding A total of five similar incidents have been reported as the cause of severe injury or death to maintenance personnel (table 1). The latest reported incident occurred in 1998 when a mechanic was inflating a nose wheel/tire assembly on a 737 airplane. On occasion, a mechanic or other ground service employee has been severely or fatally injured in an explosion caused by use of unregulated pressure from an air or nitrogen tank. Thousands of airplane tires are inflated during routine maintenance each day around the world. Prevent the buildup of excessive pressure in the wheel/tire assembly, a regulator should always be used when inflating tires. Though many wheels include overinflation pressure relief valves to

In each case, an unregulated supply of nitrogen or air was responsible for the explosion. A small number of commercial airplane maintenance personnel have been seriously injured by wheel/tire assembly explosions during servicing.

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