On December 14, 2000, about 1720 Pacific standard time, a passenger aboard a Dehavilland DHC 6, N252SA, sustained fatal injuries when she exited the airplane near Sacramento, California. The Hewlett-Packard Company was operating the airplane on a corporate transportation flight under the provisions of 14 CFR Part 91. The airline transport pilot, copilot, and four passengers were not injured, and the airplane was not damaged. The flight departed Sacramento Executive Airport about 5 minutes prior to the occurrence. Visual meteorological conditions prevailed, and an instrument flight rules (IFR) flight plan had been filed.

The company flew four scheduled roundtrip flights a day between San Jose and Lincoln, California. The flight crew's day started with the third trip. The flight to Lincoln was uneventful and no discrepancies were noted with the airplane. The airplane was on the ground about 10 minutes before departing on the return flight to San Jose, about 1620, with five passengers, four male and one female. The airplane was configured with five pairs of seats along the right side of a center aisle, three single seats left of the center aisle, and single seats on each side at the rear of the cabin area. The entry door on the left side of the cabin was forward of the left rear seat and abeam the rearmost pair of seats. An emergency exit door, hinged along the edge toward the nose of the airplane, was on the right side of the cabin between the right rear single seat and the rear pair of seats.

The female occupied the single seat near the emergency exit. The male passengers were seated in separate rows along the right side of the cabin with one occupant in each of the two rear-most pairs. The flight was in instrument meteorological conditions climbing through 4,200 feet to a cruise altitude of 6,000 feet when an amber "door open" caution light illuminated on the instrument panel. An emergency checklist directed the crew to land at the nearest suitable field, so the crew diverted into Sacramento Executive Airport.

The airplane landed and taxied to an open area on the parking ramp. While the captain left the engines running, the copilot verified the entry, emergency exit, and rear baggage doors were secure. After he reentered the cabin he could see the light was still illuminated. The crew checked with maintenance control via cell phone, and was instructed to verify a positive lock on all doors. The copilot exited the airplane and cycled each door handle including the front baggage compartment door. He felt a positive lock on each door and the light extinguished.

The airplane departed runway 12, then made a right turn to a heading of 150 degrees and leveled off at 2,000 feet. The "door open" light illuminated, the crew noticed a sound change, and felt a rush of air. The crew notified air traffic control at 1723, and requested a return to Sacramento Executive. The copilot went to the rear of the airplane, and saw the rear emergency exit door open. The copilot did not remember hearing anyone talk to him as he went toward the rear of the cabin to check the door. He secured the door and returned to the cabin. The light went out, so the crew notified air traffic control of their intention to continue to San Jose.

The male in the seat ahead of the emergency exit said he flew this trip often. Shortly after departure, he heard a loud sound, like rushing air, behind him and knew this wasn't normal. He thought he felt the wind, and turned to look over his right shoulder. He saw the female passenger with her shoulders out of the door. Her left arm was passing over his head, so he grabbed her coat at her left wrist. He tried to reach further right for a better hold, but now could only see the dark coat and her arm. He and the passenger in front of him yelled, but no one else seemed to respond. He felt a tug; the female slipped from his grasp and fell clear of the airplane.

As the passenger sat in shock, the copilot came by as he went to check the doors. The passenger recalled saying she fell out, but did not notice a reaction from the crewman. The copilot returned to the cockpit, and the airplane began a turning maneuver. The passenger assumed this meant the airplane was returning to Sacramento, but could not tell since the airplane was in instrument meteorological conditions. He was surprised when the airplane landed at San Jose, and he observed no emergency response. Everyone except the two passengers who knew of the event exited the airplane. The rearmost passenger said he experienced cramps and was physically unable to exit the airplane for several minutes. He and the other passenger who observed the female victim exit the airplane went into the flight dispatch area and notified the copilot that a passenger exited the airplane.

Officers from the San Jose Police Department, agents from the Federal Bureau of Investigation (FBI), and the investigator-in-charge (IIC) from the Safety Board examined the airplane after FBI personnel completed a forensic analysis of the airplane. A red cover, inscribed with the word LIFT in white letters, lay over the emergency exit door's operating handle. With this cover lifted up, the handle required a noticeable force to rotate it about 45 degrees in a clockwise direction. Rotation of the handle moved a metal rod about 1/2-inch in diameter approximately 1-inch from the latched to the unlatched position. The latch receptacle in the airframe did not exhibit any deformities. The IIC locked and unlocked the door several times and detected no malfunctions.

Literature from one of the company's employee assistance providers, found in the victim's luggage, contained highlighted passages dealing with recognizing the warning signs of stress. The victim's husband informed the FBI that, the day before the incident, his wife scheduled an appointment for counseling later that week.

Toxicological tests of specimens from the deceased passenger were negative for ethanol and all screened drug substances.

The Sacramento County Coroner's Office autopsy report classified the death of the passenger as a suicide.

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