Life-Limited Part

Life-limited Part is a part with an established replacement time, inspection interval, or related procedure in the airworthiness limitations section as required by 14 CFR §§ 21.50, 23.1529, 25.1529, 27.1529, 29.1529, 31.82, 33.4, and 35.4. Early type certificate data sheet (TCDS) has the mandatory replacements or inspections for some products. These products were certified before 14 CFR had the above airworthiness requirements. Also, a letter for a technical standard order (TSO) authorization may note or reference mandatory replacement or inspection for an affected part.