Recently, AFSAC worked with a key international partner nation to clear more than a dozen Not Mission Capable Supply cases which inhibited the foreign partner’s aircraft from performing identified missions. When an NMCS code appears for a country’s weapon system, the weapon system is not capable of performing its assigned missions due to lack of critical parts.

https://www.af.mil/News/Article-Display/Article/2748095/behind-the-scenes-of-foreign-military-sales-afsac-helps-international-partners/ Jonathan Tharp