- Date
- December 13, 2016, 18:47 local (Dec 14, 2016, 01:47 UTC)
- Place
- Denver, CO
- Injuries
- 1 serious, 173 uninjured
- Damage
- No damage
- Phase of flight
- Enroute
- Aircraft
- N24202Boeing 737 824
- Defining event
- Enroute-descent: Turbulence encounter
- Weather
- Instrument (IMC) · Night
- Status
- Completed · report February 23, 2017
- Report
- Approved by Office Director
- NTSB office
- Major Investigations Division
- Case key
- 94507
From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.
On this page
Probable cause
An inadvertent encounter with mountain wave turbulence.
Findings · 2
NTSB’s coded findings. Those marked are part of the probable cause; the rest are factors or other findings. Under each, the cases with the same finding.
Sequence of events
The events NTSB coded, in order, by phase of flight. The defining event is the one that best describes the accident. Under each, the cases with the same event anywhere in their sequence.
Analysis
On December 13, 2016, at 1847 mountain standard time, United Airlines flight 1545, a Boeing 737-800, N24202, experienced turbulence during descent that resulted in one flight attendant sustaining a serious injury. There were no injuries to the other passengers and crew onboard and the airplane was not damaged. The flight was operating under the provisions of 14 Code of Federal Regulations Part 121 as a regularly scheduled passenger flight from San Francisco International Airport (SFO), California to Denver International Airport (DEN), Colorado. The flight landed at DEN with no further incident. According to the operator, weather forecasts indicated that mountain wave turbulence was expected over the Sierra Nevada mountains and moderate turbulence was forecast for the descent in to DEN below 17,000 feet. As the airplane descended through approximately FL270 the captain advised the flight attendants "it's going to get bumpy" and to be seated. The flight crew reported that passing through approximately FL220 the airplane experienced increasing turbulence and then at about FL200 experienced a "big jolt." The flight attendant in position 2L was securing the galley at the time of the turbulence and was thrown to the ceiling and then struck her face on the galley counter while falling to the floor. She suffered multiple injuries including a large gash to her cheek and a fractured facial bone.
Factual narrative
On December 13, 2016, at 1847 mountain standard time, United Airlines flight 1545, a Boeing 737-800, N24202, experienced turbulence during descent that resulted in one flight attendant sustaining a serious injury. There were no injuries to the other passengers and crew onboard and the airplane was not damaged. The flight was operating under the provisions of 14 Code of Federal Regulations Part 121 as a regularly scheduled passenger flight from San Francisco International Airport (SFO), California to Denver International Airport (DEN), Colorado. The flight landed at DEN with no further incident. According to the operator, weather forecasts indicated that mountain wave turbulence was expected over the Sierra Nevada mountains and moderate turbulence was forecast for the descent in to DEN below 17,000 feet. As the airplane descended through approximately FL270 the captain advised the flight attendants "it's going to get bumpy" and to be seated. The flight crew reported that passing through approximately FL220 the airplane experienced increasing turbulence and then at about FL200 experienced a "big jolt." The flight attendant in position 2L was securing the galley at the time of the turbulence and was thrown to the ceiling and then struck her face on the galley counter while falling to the floor. She suffered multiple injuries including a large gash to her cheek and a fractured facial bone.
Aircraft
- Registration
- N24202
- Reported as
- Boeing 737 824 (824)
- Category
- Airplane
- Serial number
- 30429
- Built
- 2000
- Engines
- CFM Intl. CFM56 SERIES, turbo fanCFM Intl. CFM56 SERIES, turbo fan
- Damage
- No damage
- Flight
- Part 121
- Operator
- United Airlines
- Registered owner
- Wells Fargo Bank Northwest NA Trustee
- Airworthiness certificate
- Standard, Transport
- Departed
- SFO · San Francisco, CA
- Destination
- DEN · Denver, CO
- Flight plan
- IFR
Matched to the registry by N-number and the event date; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.
Flight crew · 2
As NTSB recorded them. NTSB leaves out names.
- Role
- Pilot
- Age
- 47
- Injuries
- None
- Certificates
- Commercial, Private, Airline transport
- Airplane ratings
- Single-engine land, Multi-engine land, Single-engine sea
- Instrument ratings
- Airplane
- Medical
- Class 1, Without waivers/limitations
- Last flight review
- November 24, 2015
- Seat
- Left
- Restraint
- 5-point
- Flight hours
- 16,730 total · 4,698 in this make and model · 9,430 as pilot in command · 184 in the last 90 days · 64 in the last 30 days · 5 in the last 24 hours
- Role
- Co-pilot
- Age
- 53
- Injuries
- None
- Certificates
- Military, Commercial, Airline transport, Private, Flight engineer
- Airplane ratings
- Multi-engine land, Single-engine land
- Instrument ratings
- Airplane
- Medical
- Class 1, Waiver time limited special
- Last flight review
- October 25, 2016
- Seat
- Right
- Restraint
- Lap only
- Flight hours
- 5,960 total · 3,150 in this make and model · 0 as pilot in command · 241 in the last 90 days · 80 in the last 30 days · 7 in the last 24 hours
Weather
- Conditions
- Instrument (IMC) · Night
- Turbulence
- Moderate
Docket · 8
The files NTSB released with the investigation on February 23, 2017, on NTSB’s docket system: statements, records, photos and specialists’ reports. 4.4 MB in all.
Other investigations on N24202 · 1
Matched to the same aircraft by N-number and date.