Accident McDonnell Douglas DC-9-32 N948VV, Thursday 7 May 1998
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Date:Thursday 7 May 1998
Time:19:20
Type:Silhouette image of generic DC93 model; specific model in this crash may look slightly different    
McDonnell Douglas DC-9-32
Owner/operator:AirTran Airways
Registration: N948VV
MSN: 47559/672
Year of manufacture:1972
Engine model:P&W JT8D
Fatalities:Fatalities: 0 / Occupants: 87
Other fatalities:0
Aircraft damage: Substantial, repaired
Category:Accident
Location:near Calhoun, GA -   United States of America
Phase: En route
Nature:Passenger - Scheduled
Departure airport:Atlanta-William B. Hartsfield International Airport, GA (ATL/KATL)
Destination airport:Chicago-Midway Airport, IL (MDW/KMDW)
Investigating agency: NTSB
Confidence Rating: Accident investigation report completed and information captured
Narrative:
The flight crew received flight release documents containing weather information from airline dispatch that was incomplete and did not contain pertinent Convective SIGMETs and a tornado watch bulletin. However, the flight crew stated that before departure from Atlanta (ATL), they looked at a computerized weather display and observed a line of adverse weather conditions along their intended route of flight. During initial climb after takeoff, the flight crew noticed that they were approaching a line of thunderstorms. The captain initially planned to fly around this line but noticed a 10-mile gap in the line that was depicted on the airplane's on-board weather radar display. The captain decided to fly through the gap, which he could also see when he looked outside of the airplane. Radar and weather data indicate that the airplane penetrated an extreme weather echo (VIP level 6) that likely contained a severe thunderstorm, hail, and severe to extreme turbulence. The thunderstorm top was above 45,000 feet. Neither the flight attendants nor the passengers received an adequate or timely briefing to remain seated and to prepare for the possibility of turbulence. The aft flight attendant and a passenger were seriously injured during the turbulence encounter. Hail shattered the front windshield and damaged the pitot system, radome, wings, tail, and engines. The flight crew successfully performed an emergency landing at Chattanooga-Lovell Field, TN (CHA). The investigation revealed that the captain had been involved in two other air carrier incidents involving adverse weather conditions. It also revealed that the airline lacked adequate training and guidance regarding hazardous weather interpretation and avoidance, as well as adequate procedures to notify flight attendants about potential turbulence. According to FAA guidance, flight crews should avoid intense or extreme level radar echoes by at least 20 miles. This guidance also instructs pilots that such echoes should be separated by at least 40 miles before flight is attempted between the echoes.

PROBABLE CAUSE: "The failure of the flight crew to maintain adequate separation from hazardous meteorological conditions. Factors contributing to the accident were: (1) the failure of AirTran Airlines to provide adequate crewmember training and guidance regarding hazardous weather encounters; (2) the failure of the flight crew to provide an adequate and timely briefing to the flight attendants regarding turbulence; and (3) the presence of hail and turbulence."

Accident investigation:
cover
  
Investigating agency: NTSB
Report number: DCA98MA045
Status: Investigation completed
Duration: 3 years and 7 months
Download report: Final report

Sources:

NTSB

Revision history:

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