The increasing level of automation in tight just-in-time subcontracting relationships in the automotive industry makes the complex, weak structured, knowledge intense and highly cooperative practice of Reactive Maintenance (RM) in Maintenance Repair and Overhaul (MRO) in this branch a demanding and stressful job. In this paper two typical breakdown situations are presented which occurred in a participative observation to gain insights to this field. Based on the analysis of the observations and the existing MRO related IT infrastructure we refer to the theoretical concept of ‘boundary objects’ to understand the practice in this field. Finally, implications for design for a MRO supporting pervasive computing environment are derived from this conceptualization. We highlight the potentials of attaching relevant information to physical objects in place to support and motivate documentation by bridging the physical world of machines with the virtual information space and to enhance the discovering of relevant information in breakdowns situations.