The intention of this study was to identify stressors in airliner maintenance organizations, by means of a multidimensional analysis of the psychophysiological strain. Two smaller studies were carried out as part of the overall main study. The first study provided the basis for hypotheses development for the second study. In study 1, EKG and EDA signals of 12 participants were recorded with portable devices. The recordings took place during the whole work day and were accompanied by a behavioural monitoring. During this monitoring, the examiners noted all tasks performed by the maintenance technicians. The tasks were grouped into task units and split into three measure periods. These periods were "begin", "middle" and "end". The comparison of means of four different psychophysiological parameters (heart rate, heart rate variability, skin conductance level and non specific skin conductance level) of the task units showed a higher strain in the task unit "car ride to the warehouse" than other car rides. Additional findings showed differences between "documentations at the task location", compared to "documentations in the office" and indications of a generally high strain during communication tasks. Study 2 investigated the central questions, which derived from the analysis of study 1 with a test sample size of 17 people. Differences between task units and differences between task categories could be verified by the use of statistical tests. An additionally included task unit in study 2 enabled a comparison between two work-related communication tasks. This comparison showed a higher heart rate and a higher skin conductance level, during all three measure periods, at communication tasks related to the flight crew than other miscellaneous work-related communication tasks.