Which inspection program is not permissible for aircraft and type operation?

The option referring to a 24-hours inspection is correct because it does not comply with established aviation safety regulations regarding inspection programs for aircraft. Regulatory bodies, like the Federal Aviation Administration (FAA) in the United States, have specific guidelines and requirements that govern how inspections must be conducted.

Annual inspections ensure that aircraft are thoroughly examined at least once a year, following a comprehensive checklist that meets safety standards and regulations. Progressive inspections provide a structured way of conducting inspections in phases, allowing continuous oversight without grounding the aircraft for long periods. Continuous airworthiness programs focus on maintaining aircraft safety and reliability through ongoing assessments and maintenance schedules.

In contrast, a 24-hours inspection is not a standard or recognized inspection program within aviation regulations. The terminology may imply a quick check, but it lacks the depth and regularity necessary to ensure aircraft safety. Such a program would not adequately meet the rigorous standards set forth by aviation authorities for determining the airworthiness of an aircraft.