When should the air line be connected to the drill motor in relation to changing the drill bit?

Connecting the air line to the drill motor after changing the drill bit is crucial for ensuring safety and preventing accidents. When a drill bit is being changed, the air supply should remain disconnected until the operation is complete. This practice helps avoid accidental activation of the drill motor while the technician is handling the tool, which could lead to injury.

Additionally, working with a disconnected air line allows for a more stable and secure environment to safely change the drill bit, as the technician can focus solely on the task without the risk of the equipment starting unexpectedly. This approach is a standard safety protocol in many aerospace assembly environments and reinforces the importance of safety practices during maintenance procedures.