Due to the steady growth in air traffic and the ever more complex technical equipment of planes, the workload of maintenance technicians and, thus, the probability of human errors, have increased (Fogarty, 2005). A fruitful way of systematically analyzing the stress maintenance technicians have to cope with is to conceptually divide their work into stressors, resources and demands and to explain their relationship to one another (Iwanowa, 2004). The aim of this study is to define stressors, resources and demands of aircraft maintenance technicians in order to shed light on possible effects on their work. The data for this study was collected by accompanying 12 maintenance technicians on a typical workday and having them talk about their experience in reconstruction interviews. In addition to that, questionnaires were used to obtain information on team dynamics, the current condition of the workers including their individual levels of regeneration and stress as well as stress resulting from their tasks, the organization of their work and their work environment. Methodologically, the interviews were analyzed using Mayrings (2008) qualitative content analysis, focusing on the test persons accounts of resources, stressors and demands during the maintenance works. For the statistical analysis of the questionnaires, the Mann-Whitney U Test was used. For the results of the study, both the qualitative data from the interviews and the quantitative data from the questionnaires revealed that the combination of stressors, resources and demands clearly causes stressful situations for maintenance workers. The stressors are time pressure, delays due to problems with tools and the number of tasks to be completed. Among the resources are personal experience and support by other maintenance workers. The demands arise in communication with others and during the maintenance works. Future studies should aim at a lower confounding of data in order to achieve even more precise results.