Attachment 0007 Critical Characteristics.pdf

This document is an M&O (Maintenance and Overhaul) Critical Safety Items form for a Blade Assembly with Part Number 70070-10052-041, associated with the UH-60 helicopter system. The document details two critical characteristics for the blade assembly, both requiring specific inspection and bonding requirements. The first critical characteristic mandates bond skin assembly inspection along the trailing edge tab, while the second requires inspection acceptance of the trailing edge bond with precise specifications, including ultrasonically checking for voids and porosity restrictions. The form indicates that serial numbers are required, engineering tests are needed, and fatigue testing is mandatory, though endurance testing is not required. The document is dated 12/16/2020 and has a routine status, with a National Stock Number (NSN) of 1615-01-691-8821.