Preventive Maintenance Checks and Services
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In the United States military, Preventive Maintenance Checks and Services, or PMCS, are the checks, service and maintenance performed before, during, and after any type of movement, or before the use of all types of military equipment. Every piece of military equipment has a PMCS Chart used to go over every detail needed or noted to ensure the proper function of every mechanical item or non-mechanical surface.
The Army and Marine Corps uses the terminology PMCS to refer to Preventive Maintenance Checks and Services.
The thought process of the Army is that the checks involved in a PMCS inspection will be carried out prior to the equipment going into combat. This early detection of a defect, before the equipment fails in service, will prevent a failure that would interfere with combat operations. This is not intended to actually prevent a failure so much as, prevent it from happening in combat.
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