Core Viewpoint - The article highlights the critical role of aircraft maintenance engineers at Eastern Airlines in ensuring passenger comfort by maintaining the aircraft's air conditioning systems during the hot summer months [1][3]. Group 1: Maintenance Operations - Eastern Airlines' maintenance teams have been actively working on the air conditioning systems of over 330 aircraft since May this year to ensure a cool flying experience for passengers [3][4]. - The air conditioning system's core component, the heat exchanger, is located in a challenging position near the aircraft's belly, requiring engineers to perform intricate and physically demanding tasks to replace it [2][3]. - Maintenance operations often take several hours, with engineers working in hot and cramped conditions, leading to physically strenuous labor [2][3]. Group 2: Working Conditions - Engineers must adopt uncomfortable positions, such as half-squatting or bending, to access the air conditioning system, which is compounded by the heat from the aircraft's engine [3]. - The maintenance environment is often hot and dirty, with engineers frequently covered in sweat, oil, and dust after completing their tasks [3]. - Regular maintenance activities include temperature checks, cleaning components, and replacing air conditioning filters to enhance passenger comfort during flights [4].