# NTSB DEN06LA095: Airbus A319-131, N839UA, Masonville, CO, July 7, 2006 - Type: NTSB accident investigation - Classification: Accident · Serious injuries · Limited investigation · Final report - Date: July 7, 2006, 08:00 local (14:00 UTC) - Place: Masonville, CO - Coordinates: 39.849998, -104.677223 - Nearby events: https://openairdocs.org/map.md?lat=39.8500&lon=-104.6772&mi=10 - Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping) - Highest injury: Serious injuries - Injuries: 1 serious, 110 uninjured - Status: Completed, report October 31, 2006 - Report: Approved by Office Director - Parties: FAA Flight Standards District Office - NTSB case key (mKey): 64058 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DEN06LA095 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/64058/pdf - Page: https://openairdocs.org/ntsb/DEN06LA095 ## Probable cause the flight's encounter with unexpected turbulence, which resulted in a passenger sustaining a fractured ankle. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - In flight encounter with weather, descent - normal - weather condition - turbulence,clear air (cause) ## Analysis The crew reported that the flight had been smooth, the "fasten seatbelt sign" was off, and passengers were allowed to get up and move around the cabin. According to the passenger, she was exiting the aft lavatory when the airplane encountered some turbulence. She stated that she felt as if she was being "jammed" to the floor, and felt her right ankle and leg "go" before she fell to the floor. She sustained serious injury to her right ankle. There were no airmen's meteorological information or significant meteorological information issued for turbulence for the area at the time of the accident. No other injuries were reported and the airplane landed without further incident. ## Factual narrative On July 7, 2006, approximately 0800 mountain daylight time, an Airbus A319-131, N839UA, owned and operated by United Air Lines Inc., encountered turbulence at 17,000 feet mean sea level (msl), near Masonville, Colorado. Visual meteorological conditions prevailed at the time of the accident. The scheduled domestic passenger flight was being operated under the provisions of Title 14 CFR Part 121 on an instrument flight rules flight plan. The captain, first officer, 3 cabin attendants and 105 passengers reported no injuries. One passenger sustained serious injuries. The cross-country flight departed Jackson, Wyoming, at 0720 and was en route to Denver International Airport (DEN), Denver, Colorado. According to United Airlines, the airplane was on the RAMMS arrival for DEN descending through 17,000 feet mean sea level. The flight crew and cabin crew all reported that the flight had been smooth, the "fasten seatbelt sign" was off, and passengers were allowed to get up and move around the cabin. According to the passenger, she was exiting the aft lavatory when the airplane encountered some turbulence. She stated that she felt as if she was being "jammed" to the floor, and felt her right ankle and leg "go" before she fell to the floor. There were no airmen's meteorological information (AIRMETS) or significant meteorological information (SIGMETS) issued for turbulence for the area at the time of the accident. No other injuries were reported and the airplane landed without further incident at DEN approximately 0820. Upon arrival in DEN, it was established that the passenger had fractured her right ankle. ## Aircraft - Registration: [N839UA](https://openairdocs.org/aircraft/N839UA), registered now, S/N 1507, built 2001 (OpenAirDocs) - Reported make and model: Airbus A319-131 - Registry model: [Airbus Industrie A319-131](https://openairdocs.org/model/airbus-industrie-a319-131) (registry code 3930317) (OpenAirDocs) - Registry engine: [IAE V2500SERIES](https://openairdocs.org/engine/iae-v2500series) (registry code 34601, turbo-jet) (OpenAirDocs) - Category: Airplane - Serial number: 1507 - Airframe hours: 18110 - Engines: International Aero Engines V2522-A5 turbo fan; International Aero Engines V2522-A5 turbo fan - Damage: No damage - Flight: Part 121 - Registered owner: United Airlines - Airworthiness certificate: Standard, Normal - Last inspection: Continuous airworthiness, June 1, 2006 - Departed: JAC, JACKSON, WY - Destination: DEN, DENVER, CO - Flight plan: IFR ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 53; injuries: none; airline transport; airplane ratings: multi-engine land; instrument ratings: airplane; medical: class 1, without waivers/limitations; last flight review April 1, 2006; seat: left; flight hours: 15,000 total, 3,000 in this make and model, 170 in the last 90 days, 36 in the last 30 days, 7 in the last 24 hours - Co-pilot; age 44; injuries: none; airline transport; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 1, without waivers/limitations; last flight review November 1, 2005; seat: rear; flight hours: 6,800 total, 2,800 in this make and model, 146 in the last 90 days, 64 in the last 30 days, 7 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Wind: variable at 4 knots - Visibility: 60 statute miles - Lowest ceiling: none - Temperature: 72 °F, dew point 55 °F - Altimeter: 30.26 inHg - Observed at: BJC ## FAA reports on this event (1) The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs). - [Accident 20060707014229A](https://openairdocs.org/incident/20060707014229A), Jul 7, 2006: Airbus A319131, Denver, CO. (-23) Flight departed jacksonville Florida and on descent to Denver Colorado encountered turbulence over the mountains. One passenger sustained a broken ankle.… 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. --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.