All the cable band nuts and bolts were replaced in the late 1990s as part of a large project to replace the hanger ropes. Ten years later, a report found serious defects. Bridge authority FETA investigated when inspectors found the nine cracked nuts. Engineers FaberMaunsell carried out lab tests and a study of similar issues on suspension bridges across the world. The nuts are used to secure 192 'cable bands' to the bridge's main cables.