Definition(s)
COS
Certificate of service.
Source: API STANDARD 16AR, Standard for Repair and Remanufacture of Drill-through Equipment, First Edition, April 2017. Global Standards
COS
Document in which the equipment manufacturer, remanufacturer, technical authority/owner, or operator certifies that the equipment has been inspected and successfully tested in accordance with the applicable equipment owner’s maintenance program and/or manufacturer’s guidelines.
Source: API STANDARD 16AR, Standard for Repair and Remanufacture of Drill-through Equipment, First Edition, April 2017. Global Standards