- Date
- May 27, 2015, 19:33 local (23:33 UTC)
- Place
- Windsor Locks, CT
- Injuries
- 1 serious, 1 minor, 197 uninjured
- Damage
- No damage
- Phase of flight
- Enroute
- Aircraft
- G-VIIYBoeing 777 - 236
- Defining event
- Enroute-descent: Turbulence encounter
- Weather
- Visual (VMC) · Day
- Status
- Completed · report April 8, 2016
- Report
- Approved by Office Director
- NTSB office
- Major Investigations Division
- Case key
- 91392
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 convective turbulence resulting in serious injury to a flight attendant.
Findings · 1
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
According to flight crew statements, they could see a line of clouds ahead of the airplane during descent and the flight encountered turbulence soon after entering the clouds. FDR data indicated the airplane was level at 14,000 feet at about 280 knots when there was an approximately 10 second period of fluctuations in both vertical and lateral acceleration. The vertical acceleration fluctuated between about +.426 g's and +1.723 g's and lateral acceleration fluctuated from about +.156 g's to -.211 g's. According to flight attendant (FA) statements, the flight encountered three "jolts" of turbulence about 30 minutes before landing. At the time of the turbulence, one FA was assisting a passenger with a drink in the aft galley. The FA braced herself during the turbulence, however, a passenger standing by the galley fell onto the FAs left lower leg, pinning her to the floor. The FA was assisted into the last row of seats in the cabin where she remained for the rest of the flight and the passenger required assistance to return to her seat. The flight crew indicated that the seatbelt sign was selected on about 5 minutes prior to the turbulence encounter, however, no PA announcement was made. The FAs reported that the seatbelt sign was not turned on until after a FA called the flight deck after the turbulence encounter. The flight crew advised ATC of the injuries and requested paramedics meet the airplane at EWR. The FA was transported to the hospital and diagnosed with two acute fractures of the left fibula.
Factual narrative
According to flight crew statements, they could see a line of clouds ahead of the airplane during descent and the flight encountered turbulence soon after entering the clouds. FDR data indicated the airplane was level at 14,000 feet at about 280 knots when there was an approximately 10 second period of fluctuations in both vertical and lateral acceleration. The vertical acceleration fluctuated between about +.426 g's and +1.723 g's and lateral acceleration fluctuated from about +.156 g's to -.211 g's. According to flight attendant (FA) statements, the flight encountered three "jolts" of turbulence about 30 minutes before landing. At the time of the turbulence, one FA was assisting a passenger with a drink in the aft galley. The FA braced herself during the turbulence, however, a passenger standing by the galley fell onto the FAs left lower leg, pinning her to the floor. The FA was assisted into the last row of seats in the cabin where she remained for the rest of the flight and the passenger required assistance to return to her seat. The flight crew indicated that the seatbelt sign was selected on about 5 minutes prior to the turbulence encounter, however, no PA announcement was made. The FAs reported that the seatbelt sign was not turned on until after a FA called the flight deck after the turbulence encounter. The flight crew advised ATC of the injuries and requested paramedics meet the airplane at EWR. The FA was transported to the hospital and diagnosed with two acute fractures of the left fibula.
Aircraft
- Registration
- G-VIIY
- Reported as
- Boeing 777 - 236 (236)
- Category
- Airplane
- Serial number
- 29967
- Built
- 1999
- Airframe hours
- 70,564
- Engines
- General Electric GE90-85BG11, 85,000 lbs thrust, turbo fanGeneral Electric GE90-85BG11, 85,000 lbs thrust, turbo fan
- Damage
- No damage
- Flight
- Part 129
- Operator
- British Airways
- Registered owner
- British Airways
- Airworthiness certificate
- Standard, Transport
- Last inspection
- Continuous airworthiness · May 27, 2015
- Departed
- LHR · London
- Destination
- EWR · Newark, NJ
- Flight plan
- IFR
Flight crew · 2
As NTSB recorded them. NTSB leaves out names.
- Role
- Pilot
- Age
- 45
- Injuries
- None
- Certificates
- Flight instructor, Airline transport
- Airplane ratings
- Multi-engine land
- Instrument ratings
- Airplane
- Medical
- Class 1, With waivers/limitations
- Last flight review
- April 12, 2015
- Seat
- Left
- Flight hours
- 11,240 total · 7,200 in this make and model · 2,921 as pilot in command · 166 in the last 90 days · 58 in the last 30 days · 0 in the last 24 hours
- Role
- Co-pilot
- Age
- 36
- Injuries
- None
- Certificate
- Airline transport
- Airplane ratings
- Multi-engine land
- Instrument ratings
- Airplane
- Medical
- Class 1, With waivers/limitations
- Last flight review
- May 10, 2015
- Seat
- Right
- Flight hours
- 3,640 total · 140 in this make and model
Weather
- Conditions
- Visual (VMC) · Day
- Wind
- 180° at 8 knots
- Visibility
- 10 statute miles
- Lowest ceiling
- 2,700 ft broken
- Temperature
- 75 °F, dew point 64 °F
- Altimeter
- 30.12 inHg
- Turbulence
- Unknown
- Observed at
- KBDL, 3 nm away
Docket · 3
The files NTSB released with the investigation on April 8, 2016, on NTSB’s docket system: statements, records, photos and specialists’ reports. 3.4 MB in all.