美国联邦航空管理局（FAA）局长布莱恩·贝德福德表示，全国性停机后，美国航空交通管制系统周六仍保持稳定，但随着航空公司努力恢复正常运营，预计周六还将有数千架航班取消。
The US air traffic control system remained stable Saturday following a nationwide outage, but thousands more flights were expected to be canceled as airlines worked to restore normal operations, Federal Aviation Administration (FAA) Administrator Bryan Bedford said.
贝德福德在与交通部长肖恩·达菲共同举行的新闻发布会上对记者说：“今天早上，系统仍保持稳定，我们的航空公司合作伙伴正在进行运营恢复。”
"This morning, the system remains stable, and our airline partners are working through the operational recovery," Bedford told reporters at a joint news conference with Transportation Secretary Sean Duffy.
贝德福德表示，航空公司预计将取消周六计划执行的约4.1万架次航班中的4000至5000架次，因为它们正在努力重新安置周五全国性停飞导致滞留的飞机和机组人员。他说，航空公司预计将在周日营业结束前恢复完整航班计划。
Bedford said airlines were expected to cancel between 4,000 and 5,000 of the approximately 41,000 flights scheduled Saturday as they worked to reposition aircraft and crews stranded by Friday's nationwide ground stop. He said airlines expected to restore their full schedules by the close of business Sunday.
“我确实认为最糟糕的阶段已经过去，但我们与航空公司利益相关方仍有大量恢复工作要做，”他说。
"I do think the worst is behind us, but we still do have a significant amount of recovery work to do with our airline stakeholder group," he said.
据贝德福德介绍，周五计划执行约5万架次航班，其中约3万架次在FAA东部时间下午3点45分左右实施全国性停飞时已完成或已在空中。
According to Bedford, about 50,000 flights were scheduled Friday, with approximately 30,000 completed or already airborne when the FAA imposed a nationwide ground stop around 3.45 pm Eastern Time.
该机构在四小时的中断期间，设法恢复了剩余2万架次航班中的约8000架次，而1.2万架次无法恢复，包括9000架次商业航班和3000架次通用航空航班。
The agency managed to recover approximately 8,000 of the remaining 20,000 flights during the four-hour disruption, while 12,000 could not be recovered, including 9,000 commercial flights and 3,000 general aviation flights.
贝德福德表示，官员们发现影响FAA 22个航路航空交通管制设施中的17个设施的不稳定性，问题已蔓延至雷达和通信系统。
Bedford said officials detected instability affecting 17 of the FAA's 22 en route air traffic control facilities, with problems spreading to radar and communications systems.
他强调，没有任何设施完全失去运行能力，但当局在未能查明不稳定性原因约45分钟后，出于预防措施实施了停飞。
He emphasized that no facility completely lost operations, but authorities imposed the ground stop as a precaution after failing to identify the cause of the instability for approximately 45 minutes.
达菲表示，这次中断似乎起源于FAA承包商L3Harris在一个偏远设施进行的例行维护，当时正在将老化的铜质电信线路更换为光纤连接。
Duffy said the disruption appeared to have originated during routine maintenance by FAA contractor L3Harris at a remote facility, where aging copper telecommunications lines were being replaced with fiber-optic connections.
L3Harris已与联邦航空管理局（FAA）合作超过20年，拥有该机构的传统电信网络，他说。
L3Harris, which has worked with the FAA for more than 20 years, owns the agency's legacy telecommunications network, he said.
一台参与维护的路由器开始向其他路由器发送大量连接尝试，每四到五秒超过1000次，干扰了飞机通信和雷达数据传输。
A router involved in the maintenance began flooding other routers with more than 1,000 connection attempts every four to five seconds, disrupting aircraft communications and radar feeds.
官员们正在调查该事件是否由承包商失误、安装或配置不当，或设备缺陷导致。“我们尚未确定故障原因，”达菲说。他补充说，在官员隔离了受影响的维护操作后，系统恢复正常。
Officials are investigating whether the incident resulted from contractor error, improper installation or configuration, or defective equipment. "We haven't determined what the fault was," Duffy said. He added that the system returned to normal after officials isolated the affected maintenance operation.
无网络攻击证据 两位官员均表示，没有证据表明此次中断是由网络攻击或人工智能相关系统导致的。
No evidence of cyberattack Both officials said there was no evidence that the disruption resulted from a cyberattack or artificial intelligence-related systems.
“我们没有看到任何恶意行为的证据，也没有看到任何与AI相关的证据，”贝德福德说。
"We see zero evidence of anything nefarious, and zero evidence of anything AI-related," Bedford said.
达菲还否认了FAA新部署的Smart系统（该系统帮助管理天气和飞机轨迹）导致停机的说法。
Duffy also rejected suggestions that the FAA's newly deployed Smart system, which helps manage weather and aircraft trajectories, contributed to the outage.
交通部长利用此次事件重申呼吁国会拨款，以实现国家老化空管基础设施的现代化。
The transportation secretary used the incident to renew his call for congressional funding to modernize the nation's aging air traffic control infrastructure.
他说，FAA的铜质通信网络约有69%已转换为光纤技术，但仍需额外投资来更换过时设备。
He said approximately 69% of the FAA's copper communications network had already been converted to fiber-optic technology, but additional investment was needed to replace outdated equipment.
贝德福德说，该机构已获得125亿美元用于现代化建设，而达菲表示将于周一向国会提交更广泛的资金申请。
Bedford said the agency had received $12.5 billion for modernization, while Duffy indicated that he would submit a broader funding request to Congress on Monday.
贝德福德警告说，在现有电信基础设施被替换之前，它将继续处于脆弱状态。“别自欺欺人了；在我们替换它之前，它将继续故障，”他说。
Bedford warned that the existing telecommunications infrastructure would remain vulnerable until it was replaced. "Let's not kid ourselves; it will continue to break until we replace it," he said.
FAA局长还向受中断影响的乘客道歉，称航空公司正在努力安排旅客出行或提供退款。
The FAA administrator also apologized to passengers affected by the disruption, saying airlines were working to accommodate travelers or provide refunds.
达菲表示，官员将继续调查事故原因，并确定是否应由L3Harris公司或设备供应商承担责任。
Duffy said officials would continue investigating the cause and determine whether L3Harris or an equipment supplier should be held responsible.