Probable cause
an encounter with severe mountain wave turbulence during cruise flight.
NTSB analysis
The flight departed normally and climbed to its cruising altitude where it encountered light turbulence. The flight crew descended to a lower altitude twice in an effort to find a smooth ride. The flight encountered an area of severe mountain wave turbulence when the flight was cruising at flight level (FL) 340 in smooth air with the seat belt sign off seriously injuring two flight attendants.
According to the NTSB weather study, an Airman's Meteorological Information (AIRMET) for moderate turbulence for altitudes between FL270 and FL390 was issued at 0745 MST for a region that included the accident location. The flight dispatch release for the accident aircraft, which included weather information, included a Flight Planning Guidance product from WSI that advised of light/occasional moderate mountain wave activity between FL310 and FL390 close to where the accident occurred.
Text from the NTSB. Open the NTSB docket for DCA14LA060 for the full record.
Event
- Date
- Feb 17, 2014
- Type
- Accident
- Place
- Kaycee, Wyoming
- Highest injury
- Serious
- Serious injuries
- 2
- Minor injuries
- 10
Boeing 737
- N-number
- N23708
- Category
- Airplane
- Year built
- 1998
- Operating rule
- Part 121 (airline)
Other records under this N-number
From the NTSB aviation accident database: N-registered aircraft, events since 2008, data through Oct 28, 2026. The file is published monthly, so the latest weeks are incomplete and recent records can change. The official source is the NTSB aviation investigation search. CheckAero is independent and not affiliated with the NTSB.