Final answer:
Before installing the target patch, accessory flanges on the top side require certain preparations such as cleaning, roughening the surface, and applying a bonding agent.
Step-by-step explanation:
Before installing the target patch on the top side of accessory flanges, certain requirements must be met. First, a clean and smooth surface is necessary to ensure proper adhesion. Any dirt, dust, or debris should be removed using a cleaning agent or solvent. Next, the surface should be roughed up slightly, either by sanding or by applying an etching solution, to create better adhesion. Finally, a primer or bonding agent should be applied to the surface before installing the target patch.