Flight Surgeon Module D Practice Test 2026 - Free Module D Practice Questions and Study Guide

Class D mishaps cover nonfatal injuries or illnesses that don’t involve death, permanent disability, or aircraft destruction. A needle-stick injury is exactly such an event: it’s a nonfatal health incident arising from exposure to a biological hazard and generally requires medical evaluation or treatment beyond first aid, without killing anyone or destroying an aircraft. That’s why this is the best fit. The other scenarios describe outcomes that move the event into a more severe category or a different dimension entirely—fatal injury clearly falls into the top category, and aircraft destruction is indicative of a major mishap. Hearing loss alone could be categorized elsewhere depending on severity, but it doesn’t provide the clean, nonfatal health-event example that needle-stick exposure does.