Designed as a multi-mission aerial refueler, the KC-46A can also be used for cargo, personnel and aeromedical transportation. The aircraft is powered by Pratt & Whitney PW 4062 engines and has a fuel capacity of 212,299 pounds. As previously reported by AVweb, the model struggled with a series of issues including problems with its remote-vision system and the refueling boom as well as defective cargo locks.

https://www.avianews.ch/post/des-kc-46a-suppl%C3%A9mentaires-pour-l-usaf?