# Accident 20111201030229A: Boeing 737-7H4, Mammoth Lakes, CA, December 1, 2011

- Type: FAA accident report (Accident/Incident Data System), as reported
- Date: December 1, 2011, 20:18 local time
- Place: Mammoth Lakes, CA
- Damage: No damage
- Phase of flight: Cruise/Level Flight
- Operating rules: Air carrier (Part 121)
- Operator: SWAA
- Location: 37.7292° N, 122.2409° W: From the FAA
- Nearby events: https://openairdocs.org/map.md?lat=37.7292&lon=-122.2409&mi=10
- Aircraft: N261WN, registered now (https://openairdocs.org/aircraft/N261WN) (OpenAirDocs)
- Registry model: Boeing 737-7H4 (registry code 1384404, https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Registry engine: CFM International CFM56-7B24 series (registry code 13044, https://openairdocs.org/engine/cfm-international-cfm56-7b24-series) (OpenAirDocs)
- Reported make and model: BOEING 737-7H4
- Reported engine: CFM INTL CFM56-7B24
- People aboard: 139
- Fatal injuries: 0
- Other injuries: 2
- Pilot certificates: Airline transport
- Pilot flight hours: 15,537 total, 11,553 in this make and model, 190 in the last 90 days
- NTSB investigation: [NTSB WPR12LA053](https://openairdocs.org/ntsb/WPR12LA053) (OpenAirDocs)
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/20111201030229A

## Narrative

As the FAA filed it, in capitals; the FAA replaces private details with ^PRIVACY DATA OMITTED^.

THIS IS A FAA FINAL REPORT AND IS NOW CONSIDERED CLOSED.  NTSB REPORT WILL REMAIN OPEN UNTIL 12/1/2012 IAW NTSB POLICY OF  ONE YEAR FROM DATE OF OCCURRENCE.  ON 12/1/2011 SOUTHWEST AIRLINES (SWA) FLIGHT 1489, B-737, DECLARED AN EMERGENCY DUE TO TW0 FLIGHT ATTENDANTS SUSTAINING INJURIES AFTER EXPERIENCING SEVERE TURBULENCE 65 MILES NORTH OF FRESNO, CA AT 30000 FT NEAR MAMMOTH LAKES, CA.  THE AIRCRAFT LANDED AT OAKLAND INTERNATIONAL AIRPORT (KOAK), WHERE BOTH FLIGHT ATTENDANTS WERE TRANSPORTED TO A LOCAL HOSPITAL. ONE FLIGHT ATTENDANT WAS RELEASED FROM HOSPITAL WITH MINOR INJURIES.  THE OTHER FLIGHT ATTENDANT SUSTAINED COMPRESSION FRACTURE OF THE VERTEBRAE.

## The NTSB's investigation of this event (1)

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [NTSB WPR12LA053](https://openairdocs.org/ntsb/WPR12LA053), Dec 2, 2011: Boeing 737-7H4 (N261WN), Oakland, CA, no damage. Probable cause: The flight crew’s flight into known severe turbulence associated with mountain wave activity.

From the FAA Accident/Incident Data System. Reports are matched to registry aircraft by N-number and event date, checked against the reported make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. For accidents, the NTSB's own investigation is the fuller record.

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