The wear/failure data of brake assemblies of a commercial type airplane (Fokker F-27) is statistically analyzed, and interpreted in a reliability framework. A three parameter Weibull model is used for reliability characterization of the brake assemblies. A spreadsheet format of analysis is proposed to analyze the data. This reliability model can be effectively integrated into an aviation facility computerized material requirement planning system to forecast the number of brake assemblies needed for a given planning horizon. (C) 1997 Elsevier Science Limited.