True or False: Clecos must be removed before placing rivets into the assembly.

Clecos, which are temporary fasteners used to hold parts together during assembly, must be removed before placing rivets into the assembly because they serve a specific purpose during the initial setup of the assembly. Clecos are designed to keep the components aligned and secure while you prepare to permanently fasten them with rivets. Once the rivets are ready to be installed, the clecos need to be removed to allow for the proper insertion and setting of the rivets.

Installing rivets with clecos still in place would hinder the rivet from seating properly and could potentially lead to misalignment or structural integrity issues. Thus, it's essential that clecos are removed to ensure a successful and reliable fastening with rivets, making the statement true.