Which of the following is NOT a Class A mishap criterion?

• A. Fatality or permanent total disability
• B. Destroyed aircraft, spacecraft, or missile
• C. Reportable damage of $2,500,000 or more
• D. Inpatient hospitalization of three or more personnel

Answer: (D)

Class A mishap criteria are the most severe events that trigger immediate, high-priority investigation and reporting. They typically include a fatality or permanent total disability, the destruction of an aircraft, spacecraft, or missile, or property damage that meets or exceeds a specified monetary threshold. In this context, using inpatient hospitalization of three or more personnel as a criterion does not fit those top-tier triggers. Inpatient injuries are serious and do prompt formal investigation, but they are not bundled into Class A under this set of criteria. The other items describe events that clearly meet the most severe thresholds: death or permanent disability, or the total destruction of a key asset, or property damage large enough to surpass the monetary limit.