Individually Owned: 150,657
Corporate Owned: 137,281
Aircraft Accident/Incident Report
Klamath Falls, Oregon 97601
Thursday, August 9, 2001 13:08 PDT
NTSB Narrative Summary Released at Completion of Accident
About 33 minutes after takeoff, while cruising at FL 330, the airplane captain observed a weather cell ahead. He initially believed that passage would occur over the cell's top, but as he neared, the cell built up. The fasten seat belt sign was turned on. However, none of the flight attendants were directed to be seated. The airplane went through the top of the cell during which time 5 seconds of moderate intensity turbulence was experienced. Two standing flight attendants and two passengers fell down. One of the flight attendants was seriously injured, and the two passengers sustained minor injuries. During the mishap, the airplane's altitude varied a maximum of 400 feet.
NTSB Probable Cause Narrative
An encounter with turbulence from a developing thunderstorm during cruise flight.
Event Information
| Type of Event | Accident |
| Event Date | 8/9/2001 |
| Event Day of the Week | Thursday |
| Time of Event | 1308 |
| Event Time Zone | Pacific Daylight Time |
| Event City | Klamath Falls |
| Event State | OREGON |
| Event Country | -- |
| Zipcode of the event site | 97601 |
| Event Date Year | 2001 |
| Event Date Month | 8 |
| MidAir Collision Indicator | No |
| On Ground Collision occurred ? | No |
| Event Location Latitude | 432600N |
| Event Location Longitude | 1215700W |
| Event Location Airport | -- |
| Event Location Nearest Airport ID | -- |
| Indicates whether the acc/inc occurred off or on an airport | Off Airport/Airstrip |
| Distance from airport in statute miles | -- |
| Degrees magnetic from airport | -- |
| Airport Elevation | -- |
| Weather Briefing Completeness | Full |
| Investigator's weather source | Weather Observation Facility |
| Time of the weather observation | 1253 Pacific Daylight Time |
| Direction of event from weather observation facility (degrees) | 156 |
| Weather Observation Facility ID | LMT |
| Elevation of weather observation facility | 4095 |
| Distance of event from weather observation facility (units?) | 77 |
| Time Zone of the weather observation | PDT |
| Lighting Conditions | Day |
| Lowest Ceiling Height | -- |
| Lowest Non-Ceiling Height | 5000 |
| Sky/Lowest/Cloud Conditions | Few |
| Sky Condition for Lowest Ceiling | None |
| Visibility Runway Visual Range (Feet) | -- |
| Visibility Runway Visual Value (Statute Miles) | -- |
| Visibility (Statute Miles) | 10 |
| Air Temperature at event time (in degrees celsius) | 32 |
| Dew Point at event time (in degress fahrenheit) | 11 |
| Wind Direction (degrees magnetic) | -- |
| Variable Wind Indicator | -- |
| Wind Speed (knots) | -- |
| Wind Velocity Indicator | Calm |
| Wind Gust Indicator | Not Gusting |
| Wind Gust (knots) | -- |
| Altimeter Setting at event time (in. Hg) | 30.08 |
| Density Altitude (feet) | -- |
| Intensity of Precipitation | -- |
| METAR weather report | -- |
| Event Highest Injury | Serious |
| On Ground, Fatal Injuries | -- |
| On Ground, Minor Injuries | -- |
| On Ground, Serious Injuries | -- |
| Injury Total Fatal | -- |
| Injury Total Minor | -- |
| Injury Total None | 129 |
| Injury Total Serious | 1 |
| Injury Total All | 1 |
| Investigating Agency | NTSB |
| NTSB Docket Number (internal use) | 12689 |
| NTSB Notification Source | FAA |
| NTSB Notification Date | Aug 9 2001 12:00AM |
| NTSB Notification Time | 0 |
| Fiche Number and/or location -used to find docket information | DMS |
| Date of most recent change to record | Feb 25 2003 9:38AM |
| User who most recently changed record | NTSB\MONR |
| Basic weather conditions | Visual Meteorological Cond |
| FAA District Office | WP-FSDO Sacramento, CA |
Aircraft Involved |
|
|---|---|
Aircraft #1 |
|
| Aircraft Registration Number | N512SW |
| NTSB Number | LAX01LA275 |
| Missing Aircraft Indicator | -- |
| Federal Aviation Reg. Part | Part 121: Air Carrier |
| Type of Flight Plan filed | IFR |
| Flight plan Was Activated? | Yes |
| Damage | None |
| Aircraft Fire | None |
| Aircraft Explosion | None |
| Aircraft Manufacturer's Full Name | Boeing |
| Aircraft Model | 737-500 |
| Aircraft Series Identifier | -- |
| Aircraft Serial Number | 24189 |
| Certified Max Gross Weight | 134000 |
| Aircraft Category | Airplane |
| Aircraft Registration Class | U.S. Registered/U.S. Soil |
| Aircraft is a homebuilt? | No |
| Flight Crew Seats | -- |
| Cabin Crew Seats | -- |
| Passenger Seats | -- |
| Total number of seats on the aircraft | 130 |
| Number of Engines | 2 |
| Fixed gear or retractable gear | Fixed |
| Aircraft, Type of Last Inspection | Continuous Airworthiness |
| Date of Last Inspection | Aug 3 2001 12:00AM |
| Airframe hours since last inspection | 44 |
| Airframe Hours | 33156 |
| ELT Installed | No |
| ELT Activated | Unknown |
| ELT Aided Location of Event Site | Unknown |
| ELT Type | -- |
| Aircraft Owner Name | SOUTHWEST AIRLINES COMPANY |
| Aircraft Owner Street Address | 2702 Love Field Dr., P.O. Box 36611 |
| Aircraft Owner City | Dallas |
| Aircraft Owner State | TX |
| Aircraft Owner Country | USA |
| Aircraft Owner Zipcode | 75235 |
| Operator is an individual? | No |
| Operator Name | -- |
| Operator Same as Owner? | Yes |
| Operator Is Doing Business As | -- |
| Operator Address Same as Owner? | No |
| Operator Street Address | 2833 Shorecrest Drive |
| Operator City | Dallas |
| Operator State | TX |
| Operator Country | USA |
| Operator Zip code | 75235 |
| Operator Code | SWAA |
| Owner has at least one certificate | -- |
| Other Operator of large aircraft? | -- |
| Certified for Part 133 or 137 Operation | -- |
| Operator Certificate Number | -- |
| Indicates whether an air carrier operation was scheduled or not | Scheduled |
| Indicates Domestic or International Flight | Domestic |
| Operator carrying Pax/Cargo/Mail | Passenger Only |
| Type of Flying (Per_Bus / Primary) | -- |
| Second Pilot on Board | Yes |
| Departure Point Same as Event | No |
| Departure Airport Code | PDX |
| Departure City | PORTLAND |
| Departure State | OR |
| Departure Country | USA |
| Departure Time | 1235 |
| Departure Time Zone | PDT |
| Destination Same as Local Flt | -- |
| Destination Airport Code | SMF |
| Destination City | SACRAMENTO |
| Destination State | CA |
| Destination Country | USA |
| Specific Phase of Flight | Cruise - normal |
| Report sent to ICAO? | No |
| Evacuation occurred | No |
| Date of most recent change to record | Nov 18 2002 2:19PM |
| User who most recently changed record | COOS |
| Since inspection or accident | Time of Accident |
| Event Location Runway Number and Location | -- |
| Runway Length | -- |
| Runway Width | -- |
| Sight Seeing flight | No |
| Air Medical Flight | No |
| Medical Flight | -- |