Which statement best describes how to verify the tow bar is securely attached?

• A. Visual inspection only.
• B. Rely on the pin color.
• C. Perform a pull test to verify secure attachment and that the tow tractor can move the aircraft without binding or misalignment.
• D. Assume based on previous use.

Answer: (C)

A secure tow bar attachment must be proven under load, not just judged by appearance. The best way to confirm this is to perform a pull test that verifies the tow bar is fully engaged and that the aircraft can be moved without binding or misalignment. Visual checks can miss issues like a partially engaged latch, a loose or damaged pin, or wear that only shows up when force is applied. Relying on color of a pin or on prior use doesn’t guarantee current security, since conditions can change with handling and time.

To do the pull test, ensure the area is clear and all safety devices are in place, verify the pin and locking mechanisms are correctly installed, then apply a controlled forward movement with the tow tractor. Observe that the tow bar remains locked, there is no unusual resistance in the attachment, and the aircraft tracks straight without binding or shifting that would indicate misalignment. If anything feels off, stop and address the issue before proceeding. Only after a successful pull test should you continue with moving the aircraft.