Atlanta - Gulfport

Atlantic Southeast Airline Flight 529 was climbing through 18,000 feet, when a blade from the left propeller separated. This resulted in distortion of the left engine nacelle, excessive drag, loss of wing lift, and reduced directional control. The degraded performance resulted in a forced landing. While landing, the airplane passed through trees, impacted the ground, and was further damaged by post impact fire. An exam of the left propeller revealed the blade had failed due to a fatigue crack that originated from multiple corrosion pits in the taper bore surface of the blade spar. The crack had propagated toward the outside of the blade and around both sides of the taper bore. Due to 2 previous blade failures (separations), a borescope inspection procedure had been developed by Hamilton Standard to inspect returned blades (that had rejectable ultrasonic indications) for evidence of cracks, pits and corrosion. The accident blade was one of 490 rejected blades that had been sent to Hamilton Standard for further evaluation and possible repair. Maintenance technicians, who inspected the blade, lacked proper NDI familiarization training and specific equipment to identify the corrosion that resulted in fatigue. The captain and seven passengers were killed.

Flight / Schedule

Atlanta - Gulfport

Registration

N256AS

MSN

120-122

Year of Manufacture

1989

Date

August 21, 1995 at 12:53 PM

Type

CRASH

Flight Type

Scheduled Revenue Flight

Flight Phase

Landing (descent or approach)

Crash Site

Plain, Valley

Crash Location

Carrollton Georgia

Region

North America • United States of America

Coordinates

33.5801°, -85.0766°

Crash Cause

Technical failure

Narrative Report

On August 21, 1995 at 12:53 PM, Atlanta - Gulfport experienced a crash involving Embraer EMB-120 Brasília, operated by Atlantic Southeast Airlines - ASA, with the event recorded near Carrollton Georgia.

The flight was categorized as scheduled revenue flight and the reported phase was landing (descent or approach) at a plain, valley crash site.

29 people were known to be on board, 8 fatalities were recorded, 21 survivors were identified or estimated. This corresponds to an estimated fatality rate of 27.6%.

Crew on board: 3, crew fatalities: 1, passengers on board: 26, passenger fatalities: 7, other fatalities: 0.

The listed crash cause is technical failure. Atlantic Southeast Airline Flight 529 was climbing through 18,000 feet, when a blade from the left propeller separated. This resulted in distortion of the left engine nacelle, excessive drag, loss of wing lift, and reduced directional control. The degraded performance resulted in a forced landing. While landing, the airplane passed through trees, impacted the ground, and was further damaged by post impact fire. An exam of the left propeller revealed the blade had failed due to a fatigue crack that originated from multiple corrosion pits in the taper bore surface of the blade spar. The crack had propagated toward the outside of the blade and around both sides of the taper bore. Due to 2 previous blade failures (separations), a borescope inspection procedure had been developed by Hamilton Standard to inspect returned blades (that had rejectable ultrasonic indications) for evidence of cracks, pits and corrosion. The accident blade was one of 490 rejected blades that had been sent to Hamilton Standard for further evaluation and possible repair. Maintenance technicians, who inspected the blade, lacked proper NDI familiarization training and specific equipment to identify the corrosion that resulted in fatigue. The captain and seven passengers were killed.

Aircraft reference details include registration N256AS, MSN 120-122, year of manufacture 1989.

Geospatial coordinates for this crash are approximately 33.5801°, -85.0766°.

Fatalities

Total

8

Crew

1

Passengers

7

Other

0

Crash Summary

Atlantic Southeast Airline Flight 529 was climbing through 18,000 feet, when a blade from the left propeller separated. This resulted in distortion of the left engine nacelle, excessive drag, loss of wing lift, and reduced directional control. The degraded performance resulted in a forced landing. While landing, the airplane passed through trees, impacted the ground, and was further damaged by post impact fire. An exam of the left propeller revealed the blade had failed due to a fatigue crack that originated from multiple corrosion pits in the taper bore surface of the blade spar. The crack had propagated toward the outside of the blade and around both sides of the taper bore. Due to 2 previous blade failures (separations), a borescope inspection procedure had been developed by Hamilton Standard to inspect returned blades (that had rejectable ultrasonic indications) for evidence of cracks, pits and corrosion. The accident blade was one of 490 rejected blades that had been sent to Hamilton Standard for further evaluation and possible repair. Maintenance technicians, who inspected the blade, lacked proper NDI familiarization training and specific equipment to identify the corrosion that resulted in fatigue. The captain and seven passengers were killed.

Cause: Technical failure

Occupants & Outcome

Crew On Board

3

Passengers On Board

26

Estimated Survivors

21

Fatality Rate

27.6%

Known people on board: 29

Operational Details

Schedule / Flight

Atlanta - Gulfport

Flight Type

Scheduled Revenue Flight

Flight Phase

Landing (descent or approach)

Crash Site

Plain, Valley

Region / Country

North America • United States of America

Aircraft Details

Registration

N256AS

MSN

120-122

Year of Manufacture

1989

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