# Preventative maintenance To keep your DeltaQuad in proper condition the following steps should be taken: ## After every flight * Clean the propellers of any dirt and inspect for damage. * Clean the fuselage and wings, this will improve performance. * Inspect the avionics, and make sure all components are still securely attached in their proper place and all connectors are securely fastened. * Inspect motor and servo linkage screws. Should they have come undone, lock bond must be used on all screws when re-attaching. ## After 200 flights or 12 months To keep your vehicle in the best condition and safe to operate beyond this point [scheduled maintenance](/deltaquad-pro-operations-manual-v2/maintenance/scheduled-maintenance.md) should be performed. This entails the preventive replacement of many components and a thorough inspection and test flight. ## Replacing components The DeltaQuad has been designed to allow easy replacement of components. Every component on the DeltaQuad is available as a replacement part. If you require replacement parts please contact Vertical Technologies. When replacing motors or elevon linkages, lock bond must be used on all screws and nuts.\ When replacing propellers for the VTOL modules no lock bond is required as these are self-tightening. When replacing the pusher motor propeller lock bond is required on the propeller adapter nut as this motor can spin in both directions. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.deltaquad.com/deltaquad-pro-operations-manual-v2/maintenance/preventative-maintenance.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.