DFW06LA115

NTSB accident investigation · Boeing 777-233ER · DFW Int'l Apt, TX · April 25, 2006

Accident · Serious injuriesLimited investigationFinal report
Date
April 25, 2006, 17:30 local (22:30 UTC)
Place
DFW Int'l Apt, TX
Injuries
1 serious, 253 uninjured
Damage
No damage
Phase of flight
Enroute
Aircraft
N789ANBoeing 777-233ER
Weather
Visual (VMC) · Dusk
Status
Completed · report July 31, 2006
Report
Approved by Office Director
Parties
Dallas/Fort Worth FSDO
FAA report
20060425010089A
Case key
63601

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

The in-flight encounter with turbulence in clouds resulting in a flight attendant being injured.

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 weatherDescent - normal
Seat belt - not usedFlight attendantCause
Weather condition - turbulence in cloudsCause

Analysis

An airline passenger flight was descending into the airport terminal area from 36,000 feet, with the seat belt sign on. Approximately 25,000 feet, the captain made a passenger announcement, and then told the flight attendants to prepare for landing. Shortly after the announcement, the airplane experienced moderate turbulence, and a flight attendant who had not yet sat down fell into a closet door and sustained a fractured ankle. Paramedics were called to meet the airplane at the gate, and the flight landed without further incidence. There was no significant meteorological information (SIGMET) issued, and there was no damage to the airplane.

Factual narrative

On April 25, 2006, approximately 1730 central daylight time (CDT), a twin-engine Boeing 777 transport category airplane, N789AN, operated by American Airlines, Inc., as flight 945, encountered moderate turbulence during descent into the Dallas/Fort Worth International Airport (DFW), near Dallas, Texas. There was no damage to the airplane. Visual meteorological conditions prevailed, and an instrument flight rules (IFR) flight plan was filed for the scheduled domestic flight conducted under 14 Code of Federal Regulations Part 121. One flight attendant sustained serious injuries. The remaining 2 flight crewmembers, 7 flight attendants, and 244 passengers were not injured. The flight originated from the Miami International Airport (MIA) at 1619 eastern daylight time (EDT), with DFW as its intended destination.

The captain stated that he informed the cabin crew he was going to turn on the seat belt sign early because of the possibility of turbulence. Soon after initial descent from 36,000 feet, the seat belt sign was turned on. He added that about 25 minutes from DFW while at approximately 25,000 feet, he made a passenger announcement (PA) and told the flight attendants to prepare for landing. Shortly after the announcement, the airplane experienced "what I would classify as moderate turbulence at most." About 20 minutes before landing, the captain called to make sure the flight attendants were in their seats, but was informed that one of the flight attendants had suffered a broken ankle. The first officer then called to have paramedics meet the airplane at the gate. The flight landed without further incidence.

The flight attendant reported that the last 45 minutes of the flight was turbulent, and the flight attendants were in their assigned jump seats most of the time. The flight attendant stated that she was closing a closet after passing out coats to first class customers when the accident occurred. She said, "I turned and fell into the closet due to the airplane dropping due to turbulence." She immediately informed another flight attendant that she thought she had just broken her ankle. According to safety personnel form American Airlines, the flight attendant sustained a dislocation and double fracture of her left ankle.

The company issued weather forecast for flight 945 showed that marginal visual flight rules (MVFR) conditions would continue until the next morning over the eastern half of Texas, with scattered to broken showers continuing during the afternoon. There was no significant meteorological information (SIGMET) issued for DFW for thunderstorm activity (TSTM) or clear air turbulence (CAT). At 1753, the automated surface observing system at DFW reported wind from 350 degrees at 14 knots, visibility 10 statute miles, overcast skies at 3,700 feet, temperature 17 degrees Centigrade, dew point 8 degree Centigrade, and barometric pressure at 29.94 inches of Mercury.

Aircraft

Registration
N789AN
Reported as
Boeing 777-233ER
Category
Airplane
Serial number
30252
Airframe hours
22,155
Engines
Rolls-Royce RB211, 92,450 lbs thrust, turbo fanRolls-Royce RB211, 92,450 lbs thrust, turbo fan
Damage
No damage
Flight
Part 121
Registered owner
American Airlines
Airworthiness certificate
Standard, Transport
Last inspection
Continuous airworthiness · February 1, 2006
Departed
MIA · Miami, FL
Destination
DFW · Dallas, TX
Flight plan
IFR
Airport
DFW · Dallas/Fort Worth Int'l

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
57
Injuries
None
Certificates
Commercial, Flight instructor, Airline transport
Airplane ratings
Single-engine land, Multi-engine land
Instrument ratings
Airplane
Medical
Class 1
Last flight review
December 1, 2005
Seat
Left
Flight hours
19,600 total · 9,700 in this make and model · 14,000 as pilot in command · 120 in the last 90 days · 30 in the last 30 days
Role
Co-pilot
Age
43
Injuries
None
Certificates
Commercial, Airline transport
Airplane ratings
Multi-engine land, Single-engine land
Instrument ratings
Airplane
Medical
Class 1
Last flight review
September 1, 2005
Seat
Right
Flight hours
11,000 total · 1,100 in this make and model · 2,000 as pilot in command · 30 in the last 90 days · 10 in the last 30 days · 2 in the last 24 hours

Weather

Conditions
Visual (VMC) · Dusk
Wind
350° at 14 knots
Visibility
10 statute miles
Lowest ceiling
3,700 ft broken
Temperature
63 °F, dew point 46 °F
Altimeter
29.94 inHg
Observed at
DFW, 75 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 N789AN · 2

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