Existing System Will Be Shut Down, New System Will Take Over In A Cutover The Federal Aviation Administration (FAA) will soon take a significant step forward in modernizing the Notice to Airmen (NOTAM) service with the shutdown of the existing U.S. NOTAM System and a cutover to a new and more robust system in the morning hours of Saturday, April 18. The transition will take place between midnight and 4 a.m. EDT. During that time, NOTAMs active prior to the maintenance window will be available via all normal distribution channels. The FAA also recommends using FNS NOTAM search to ensure operators receive the most timely and accurate information.After 4 a.m. EDT on that date, NOTAMs obtained through the FNS page and third-party providers will come through the NOTAM Management Service (NMS), although operators shouldn’t notice any differences.