What would happen if a large multi-engine turbine airplane operating under commuter requirements fails to pass inspection?

If a large multi-engine turbine airplane operating under commuter requirements fails to pass inspection, it must be grounded until suitable corrective actions are taken and the aircraft can pass a subsequent inspection. This requirement is tied to safety regulations that ensure that all aircraft operating under specific rules meet stringent operational standards. In the commuter category, where safety is paramount due to carrying passengers, any failure in the inspection could mean that significant safety issues are present.

Grounding the aircraft ensures that it cannot be operated in an unsafe condition, protecting both passengers and crews. Only after issues are rectified and the aircraft successfully passes inspection can it be returned to service. This reinforces the importance of regular and thorough inspections for maintaining airworthiness and operational safety in compliance with Federal Aviation Regulations (FARs).

Other options imply alternative actions that do not prioritize safety or compliance with regulations, making them unsuitable responses in this context.