When should you consider replacing hydraulic tubing?

Hydraulic tubing is a critical component in an aircraft’s hydraulic system, and its integrity is essential for safe operation. Signs of excessive wear or damage are clear indicators that it may no longer function effectively and could fail during operation. This includes any visible cracks, dents, kinks, or other physical deformities that compromise the tubing's ability to withstand the pressures and conditions within the hydraulic system. Regular inspections that reveal such issues should prompt immediate attention and potential replacement of the tubing to ensure both performance and safety.

While factors like discoloration, rusted fittings, and loss of flexibility might also indicate an issue, they do not necessarily mean that the tubing itself is compromised. Discoloration might not affect functionality directly, and rust on fittings can often be addressed without replacing the tubing. Similarly, flexibility can diminish without necessarily indicating that the tubing is no longer safe for use. Thus, focusing on excessive wear or visible damage is the most direct and critical reason for considering replacement, as it directly reflects the structural integrity required for hydraulic systems.