 Planned maintenance is preplanned, and can be date-based, based on equipment running hours, or on distance travelled . Parts that have scheduled maintenance at fixed intervals, usually due to wearout or a fixed shelf life, are sometimes known as time-change interval , or TCI items.
<fluency>  Planned maintenance is preplanned, and can be date-based, based on equipment running hours, or on distance travelled . Parts that have scheduled maintenance at fixed intervals, usually due to wearout or a fixed shelf life, are sometimes known as time-change interval , or TCI items.
 Planned maintenance is preplanned, and can be date-based, based on equipment running hours, or on distance travelled . Parts that have scheduled maintenance at fixed intervals, usually due to wearout or a fixed shelf life, are sometimes known as time-change intervals , or TCI items.