Aviat Aircraft INC A-1C-180 accident near Mckinney, Texas, December 4, 2011

The NTSB's narrative final · quoted from the NTSB record

After returning from a short night flight, the airplane was parked on a ramp in front of a hangar to deplane the passenger and take another person on a flight. The engine was at idle power and the propeller was turning. The pilot stated that he leaned across the airplane and opened the right door so the passenger could exit. When he saw that she was exiting toward the front of the airplane, he put his arm out and told her to walk toward the rear after exiting. Once the pilot saw that the passenger was clear of the wing strut and walking away, he lowered his arm. A witness who was walking from the hangar toward the airplane saw that the passenger was walking toward the front of the aircraft. He yelled for her to stop, and a second later she hit the propeller from the rear and fell to the ground. He noticed that the pilot immediately shut the engine down and then called emergency services. FAA Advisory Circular (AC) 91-42D, "Hazards of Rotating Propeller and Helicopter Rotor Blade,” states that a propeller under power, even at slow idling speed, has sufficient force to inflict injuries. It cautions that the engine “should be shut down before boarding or deplaning passengers.” It further states that “when it is necessary to discharge a passenger from an aircraft on which an engine is running, never stop the aircraft with the propeller in the path of the passenger’s route from the aircraft.”

The complete narrative as the NTSB published it. The NTSB's docket holds the report as a PDF and any photographs, statements and other documents from the investigation.