What is typically the first step taken during a maintenance check of a fire extinguisher?

The first step typically taken during a maintenance check of a fire extinguisher is a visual inspection of the cylinder. This initial inspection is crucial as it helps to identify any physical damage, corrosion, or any other visible issues that could compromise the effectiveness of the extinguisher. By visually assessing the condition of the cylinder, technicians can ensure that the extinguisher is in good shape before proceeding with further tests or checks, such as examining the pressure gauge or checking the weight. This step lays the foundation for a thorough maintenance process, ensuring that any apparent problems are addressed right away and that the extinguisher will function properly when needed.