Greensboro - Atlanta
Flight / Schedule
Greensboro - Atlanta
Aircraft
Douglas DC-9Registration
N838AT
MSN
47442/524
Year of Manufacture
1970
Operator
Airtran AirwaysDate
August 8, 2000 at 03:44 PM
Type
CRASHFlight Type
Scheduled Revenue Flight
Flight Phase
Landing (descent or approach)
Crash Site
Airport (less than 10 km from airport)
Crash Location
Greensboro North Carolina
Region
North America • United States of America
Coordinates
36.0726°, -79.7920°
Crash Cause
Technical failure
Narrative Report
On August 8, 2000 at 03:44 PM, Greensboro - Atlanta experienced a crash involving Douglas DC-9, operated by Airtran Airways, with the event recorded near Greensboro North Carolina.
The flight was categorized as scheduled revenue flight and the reported phase was landing (descent or approach) at a airport (less than 10 km from airport) crash site.
63 people were known to be on board, 0 fatalities were recorded, 63 survivors were identified or estimated. This corresponds to an estimated fatality rate of 0.0%.
Crew on board: 5, crew fatalities: 0, passengers on board: 58, passenger fatalities: 0, other fatalities: 0.
The listed crash cause is technical failure. Examination of the area of the fire origin revealed that relay R2-53, the left heat exchanger cooling fan relay, was severely heat damaged, as were R2-54 and the other relays in this area. However, the R2-53 relay also exhibited loose terminal studs and several holes that had burned through the relay housing that the other relays did not exhibit. The wire bundles that run immediately below the left and right heat exchanger cooling fans and the ground service tie relays exhibited heat damage to the wire insulation, with the greatest damage located just below the R2-53 relay. The unique damage observed on the R2-53 relay and the wire damage directly below it indicates that fire initiation was caused by an internal failure of the R2-53 relay. Disassembly of the relay revealed that the R2-53 relay had been repaired but not to the manufacturer's standards. According to the manufacturer, the damage to the relay housing was consistent with a phase-to-phase arc between terminals A2 and B2 of the relay. During the on-scene portion of the investigation, three of the four circuit breakers in the left heat exchanger cooling fan were found in the tripped position. To determine why only three of the four circuit breakers tripped, all four were submitted to the Materials Integrity Branch at Wright-Patterson Air Force Base, Dayton, Ohio, for further examination. The circuit breakers were visually examined and were subjected to an insulation resistance measurement, a contact resistance test, a voltage drop test, and a calibration test (which measured minimum and maximum ultimate trip times). Testing and examination determined that the circuit breaker that did not trip exhibited no anomalies that would prevent normal operation, met all specifications required for the selected tests, and operated properly during the calibration test. Although this circuit breaker appeared to have functioned properly during testing, the lab report noted that, as a thermal device, the circuit breaker is designed to trip when a sustained current overload exists and that it is possible during the event that intermittent arcing or a resistive short occurred or that the circuit opened before the breaker reached a temperature sufficient to trip the device.
Aircraft reference details include registration N838AT, MSN 47442/524, year of manufacture 1970.
Geospatial coordinates for this crash are approximately 36.0726°, -79.7920°.
Fatalities
Total
0
Crew
0
Passengers
0
Other
0
Crash Summary
Examination of the area of the fire origin revealed that relay R2-53, the left heat exchanger cooling fan relay, was severely heat damaged, as were R2-54 and the other relays in this area. However, the R2-53 relay also exhibited loose terminal studs and several holes that had burned through the relay housing that the other relays did not exhibit. The wire bundles that run immediately below the left and right heat exchanger cooling fans and the ground service tie relays exhibited heat damage to the wire insulation, with the greatest damage located just below the R2-53 relay. The unique damage observed on the R2-53 relay and the wire damage directly below it indicates that fire initiation was caused by an internal failure of the R2-53 relay. Disassembly of the relay revealed that the R2-53 relay had been repaired but not to the manufacturer's standards. According to the manufacturer, the damage to the relay housing was consistent with a phase-to-phase arc between terminals A2 and B2 of the relay. During the on-scene portion of the investigation, three of the four circuit breakers in the left heat exchanger cooling fan were found in the tripped position. To determine why only three of the four circuit breakers tripped, all four were submitted to the Materials Integrity Branch at Wright-Patterson Air Force Base, Dayton, Ohio, for further examination. The circuit breakers were visually examined and were subjected to an insulation resistance measurement, a contact resistance test, a voltage drop test, and a calibration test (which measured minimum and maximum ultimate trip times). Testing and examination determined that the circuit breaker that did not trip exhibited no anomalies that would prevent normal operation, met all specifications required for the selected tests, and operated properly during the calibration test. Although this circuit breaker appeared to have functioned properly during testing, the lab report noted that, as a thermal device, the circuit breaker is designed to trip when a sustained current overload exists and that it is possible during the event that intermittent arcing or a resistive short occurred or that the circuit opened before the breaker reached a temperature sufficient to trip the device.
Cause: Technical failure
Occupants & Outcome
Crew On Board
5
Passengers On Board
58
Estimated Survivors
63
Fatality Rate
0.0%
Known people on board: 63
Operational Details
Schedule / Flight
Greensboro - Atlanta
Operator
Airtran AirwaysFlight Type
Scheduled Revenue Flight
Flight Phase
Landing (descent or approach)
Crash Site
Airport (less than 10 km from airport)
Region / Country
North America • United States of America
