Winter can be a challenging time for airline operations due to the frequency, and sometimes unpredictability, of winter weather. Vaisala CheckTime is a modern decision-support system that helps airlines succeed during winter weather.
Winter can be a challenging time for airline operations due to the frequency, and sometimes unpredictability, of winter weather. The stress of staying within budgets, maintaining a flawless level of safety, and meeting the long-term business goals of the airline are all demands placed on operations. One of the significant winter weather challenges is the de-icing and anti-icing of aircraft. Currently, airline pilots use holdover time tables to provide a time in the future when it is no longer safe for the aircraft to depart based on an assumption that the present weather conditions will remain constant. These tables are based on air temperature, precipitation type and intensity; where observed visibility is used to estimate precipitation intensity. The tables are cumbersome for pilots and cause added distraction along with other departure procedures.
Advanced Weather Technology
Vaisala CheckTime is a modern decision-support system that helps airlines succeed during winter weather. Developed by aviation weather experts, CheckTime uses Vaisala precision weather sensors that measure temperature, wind, precipitation type, and Liquid Water Equivalent (LWE) to calculate the impact of changing weather conditions on anti-icing fluid after the aircraft anti-ice time. Updated every minute, Vaisala CheckTime is able to provide dynamic decision support to the pilot via the airline ACARS computer or mobile application in the cockpit.
Instead of using holdover time tables, the pilot receives a CheckTime message that allows them to maintain awareness of the state of the fluids on the aircraft. Using CheckTime streamlines airport operations while maintaining the highest level of aviation safety.
Type-IV anti-icing fluid is used. 30 minutes after de/anti-icing, the pilot enters the anti-ice time to ACARS and receives a ProtectTime of 13:35. Meaning, at that moment, your anti-icing is valid until 13:35. CheckTime calculates the impact of changing weather conditions on the anti-icing fluid every minute. All fluids and mixtures are impacted differently, so the ProtectTime may change.