On a small number of aerial devices, the cap at the end of the hydraulic lift cylinder could detach. If this happens, the boom lift can drop suddenly.
Safety Risk
A boom lift that drops suddenly could create a risk of injury to the operator and nearby people.
Corrective Actions
Altec Industries will notify owners by mail and advise you to inspect the part number on the boom lift cylinder. If your lift has this cylinder, Altec recommends replacing the cylinder or removing the unit from service.