The Air Force is working to resolve three issues besetting the KC-46 program. The refueling tanker is slated to replace the aging KC-135. Two of the problems — with the high-frequency radios and the refueling boom remaining extended without being directed to do so — are close to being solved, according to Air Force Magazine. The third, however, is considered more serious and difficult to resolve. The magazine reported that the problem centers upon the boom scraping against the surface of stealth aircraft without the boom operator’s knowledge. The abrasion could compromise ability of stealth aircraft to remain undetected by potential adversaries. The Air Force is only beginning to consider how to address the problem, and plans to conduct a series of related tests in order to arrive at a solution.