How should as built/as certified components be replaced?

The correct approach to replacing as built/as certified components is to do so in accordance with approved drawings and specifications. This ensures that any replacements made are consistent with the original design and construction standards, which are critical for maintaining safety, operational integrity, and compliance with regulatory requirements.

By following the approved drawings and specifications, personnel can ensure that the replacement components match the intended design parameters, including dimensions, materials, and functionality. This adherence minimizes the risk of errors that could arise from deviations, which might compromise system performance and safety. Moreover, it provides a clear and verifiable process that can be audited, thereby enhancing accountability in maintenance practices.

Using existing procedures is important but lacks the specificity needed for this context. Randomly replacing components based on need would lead to inconsistencies and potential safety hazards. Replacing them whenever convenient would neglect the structured approach necessary for diligent maintenance of life support systems.