NYC06LA016

NTSB accident investigation · Boeing 737-832 · Atlantic Ocean (Atlantic Ocean) · October 22, 2005

Accident · Serious injuriesLimited investigationFinal report
Date
October 22, 2005, 14:40 local (18:40 UTC)
Place
Atlantic Ocean (Atlantic Ocean)
Injuries
1 serious, 2 minor, 147 uninjured
Damage
No damage
Phase of flight
Enroute
Aircraft
N378DABoeing 737-832
Weather
Visual (VMC) · Day
Status
Completed · report October 3, 2006
Report
Approved by Office Director
Parties
FAA FSDO-01
FAA report
20051022031479A
Case key
62719

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.

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Probable cause

An encounter with turbulence during cruise flight.

Sequence of events

NTSB’s coding before 2008: each occurrence and phase of flight, and the causes and factors under it. The codes are defined in NTSB’s coding manual.

In flight encounter with weatherCruise - normal
Weather condition - turbulenceCause

Analysis

Light turbulence prevailed during the climb after takeoff, and the seatbelt sign remained illuminated. About 230 miles northwest of the departure airport, at 34,000 feet, the turbulence subsided; however, more turbulence was forecasted for about 150 miles ahead of the airplane. The captain announced to the passengers that the seatbelt sign would be turned off for 10 minutes to allow them an opportunity to move about the cabin, but would be turned on again due to the upcoming turbulence. About 3 minutes after turning the seatbelt sign back on, the airplane encountered moderate turbulence. During that time, two passengers fell as they were attempting to sit down. In addition, a flight attendant fell to the floor as she was attempting to sit, and fractured her pelvis.

Factual narrative

On October 22, 2005, about 1440 eastern daylight time, a Boeing 737-832, N378DA, operated by Delta Air Lines Inc., as flight 612, was not damaged during an encounter with turbulence in cruise flight about 300 miles northwest of Hamilton, Bermuda. There were no injuries to the 2 certificated airline transport pilots, 2 flight attendants, and 143 passengers; while 1 flight attendant was seriously injured, and 2 passengers sustained minor injuries. Visual meteorological conditions prevailed for the flight that departed Hamilton, Bermuda; destined for General Edward Lawrence Logan International Airport (BOS), Boston, Massachusetts. An instrument flight rules flight plan was filed for the air carrier flight conducted under 14 CFR Part 121.

The flightcrew reported that light turbulence prevailed during the climb from Bermuda, and the seatbelt sign remained illuminated. About 230 miles northwest of Bermuda, at 34,000 feet, the turbulence subsided; however, more turbulence was forecasted for about 150 miles ahead of the airplane. The captain announced to the passengers that the seatbelt sign would be turned off for 10 minutes to allow them an opportunity to move about the cabin, but would be turned on again due to the upcoming turbulence. The captain also decided against meal service due to the anticipated turbulence after 10 minutes.

About 300 miles northwest of Bermuda, the captain turned the seatbelt sign back on. About 3 minutes later, the airplane encountered moderate turbulence. During that time, two passengers and a flight attendant fell as they were attempting to sit down. The passengers sustained minor injuries, and the flight attendant fractured her pelvis.

The flight subsequently landed uneventfully at BOS, and was met by medical personnel.

Aircraft

Registration
N378DA
Reported as
Boeing 737-832
Category
Airplane
Serial number
29624
Airframe hours
19,800
Engines
Snecma CFM56-7B26, 26,000 lbs thrust, turbo fanSnecma CFM56-7B26, 26,000 lbs thrust, turbo fan
Damage
No damage
Flight
Part 121
Registered owner
Delta Air Lines Inc
Airworthiness certificate
Standard, Transport
Last inspection
Continuous airworthiness · October 1, 2005 · 30 hours before
Departed
BDA · Hamilton
Destination
BOS · Boston, MA
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
Certificate
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
June 1, 2006
Seat
Left
Flight hours
14,230 total · 1,950 in this make and model · 200 in the last 90 days · 5 in the last 24 hours
Role
Co-pilot
Age
36
Injuries
None
Certificates
Airline transport, Flight engineer
Airplane ratings
Multi-engine land
Instrument ratings
Airplane
Medical
Class 1, Without waivers/limitations
Last flight review
February 1, 2005
Seat
Right
Flight hours
9,352 total · 3,263 in this make and model · 185 in the last 90 days · 5 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
50° at 14 knots
Visibility
10 statute miles
Lowest ceiling
3,900 ft broken
Temperature
48 °F, dew point 43 °F
Altimeter
29.87 inHg
Observed at
BOS, 500 nm away

FAA reports on this event · 1

The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.

Other investigations on N378DA · 1

Matched to the same aircraft by N-number and date.