Final answer:
The pilot-in-command is responsible for determining the airworthiness of the aircraft after inspections and repairs have been made.
Step-by-step explanation:
After aircraft inspections have been made and defects have been repaired, the responsibility for determining that the aircraft is in an airworthy condition falls on the pilot-in-command. The pilot is ultimately responsible for the safe operation of the aircraft and must ensure that all necessary inspections and repairs have been completed before takeoff.