Any injury which 1) Requires hospitalization for more than 48 hours, commencing within 7 days from the date the injury was received; 2) Results in a fracture of any bone except simple fractures of fingers, toes, or nose; 3) Involves lacerations which cause severe hemorrhages, nerve, muscle, or tendon damage; 4) Involves injury to any internal organ; 5) Involves second or third-degree burns, or any burns affecting more than 5 percent of the body surface.
(FAA2) (NTSB1) (NTSB2)