Erratum to “Failure analysis of brazed air passages of an aircraft fuel system [Engineering Failure Analysis, Volume 17, Issue 6, September 2010, Pages 1495–1499]”

Air passages of an aircraft fuel system are manufactured from 4130 steel tubes brazed using BNi-4 filler metal. It was observed that brazed tubes leak after flying about 100 h. In this case study, microscopy techniques and hardness measurements were employed to identify the root cause of this failure. It was found that wide joint clearance promotes brittle phases at the joint centerline which can act as crack nucleation sites under thermal expansion and misalignment stresses. Based on the obtained results, joint clearance was reduced to optimum value. This reduction prohibited the occurrence of leakage and solved the problem.