At what times should a gear retraction check be performed?

A gear retraction check is typically performed during annual or other inspections, as well as following a hard landing. This procedure is crucial in ensuring that the landing gear system functions correctly and reliably. After a hard landing, there is a potential for damage or malfunction in the gear retraction mechanisms due to the stress and forces involved, making it essential to verify their operational integrity.

Performing the check during scheduled inspections allows for a thorough assessment of the components and systems associated with landing gear operation, ensuring that any wear or issues can be addressed promptly. Regular checks during scheduled maintenance can help prevent failures during flight operations, contributing to overall aircraft safety.

The other options do not encompass the appropriate scenarios for executing a gear retraction check. For instance, conducting this check after every flight would be overly redundant and not practical, given that the landing gear system's integrity is typically stable between flights unless an incident warrants further inspection. Checking only during takeoff doesn't provide sufficient oversight, while pre-engine start checks focus more on critical engine and systems readiness rather than landing gear functionality.