NTSB Identification: MIA00LA169.
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Scheduled 14 CFR operation of SOUTHWEST AIRLINES CO.
Accident occurred Saturday, May 20, 2000 in NASHVILLE, TN
Probable Cause Approval Date: 04/18/2003
Aircraft: Boeing 737-500, registration: N522SW
Injuries: 1 Serious,1 Uninjured.

NTSB investigators may have traveled in support of this investigation and used data provided by various sources to prepare this aircraft accident report.

The Nashville International Airport terminal sustained a complete electrical power outage due to transiting thunderstorms and lightning. Main terminal lighting and jetway power was interrupted for about 1 hour 30 minutes. During that time, a Southwest Airlines Boeing 737-500 cleared the runway after landing, and the pilot taxied to the parking ramp to await the arrival of portable airstairs. After about an hour delay, a passenger left his seat, assaulted a flight attendant, and jumped out of the aft cabin passenger-loading door. He sustained a fracture of the left wrist, and was picked up and transported to a medical clinic by the airport police.

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

The passenger's onboard disturbance and self-evacuation from the parked aircraft, resulting in injuries. A factor in the accident was the lack of backup electrical power to the terminal which necessitated a lengthy ground hold.

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