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In this paper, the authors review damage mechanisms and failure modes of bonded composite repairs applied to aluminum aircraft structures, with a focus on the effects of bending on the performance of asymmetric or one-sided repairs. Failure mechanisms are elucidated using results from testing carried out during the course of the University of British Columbia Bonded Composite Repair Program (UBC-BCRP). The authors then outline the regulatory requirements for damage tolerance and describe the new methods and test data developed under the UBC-BCRP to improve the analysis of bending repairs.