Delta DC95 at Atlanta on Aug 6th 2011, rejected takeoff due to uncontained engine failure
Last Update: November 19, 2014 / 22:21:42 GMT/Zulu time
Incident Facts
Date of incident
Aug 6, 2011
Classification
Incident
Cause
Rejected takeoff
Airline
Delta Airlines
Flight number
DL-2272
Departure
Atlanta, United States
Destination
Pittsburgh, United States
Aircraft Registration
N676MC
Aircraft Type
DOUGLAS DC-9-50
ICAO Type Designator
DC95
The NTSB reported the right hand engine had suffered an uncontained failure. The #2 engine cowling was found penetrated and three small holes were found in the engine causing. An impact scar was found on the outer pane of a cabin window on the right hand side forward of the engine. One fan blade was found separated below the platform.
On Nov 19th 2014 the NTSB released their final report concluding the probable cause of the incident was:
The probable cause of the No. 2 engine failure and subsequent aborted takeoff was the high cycle fatigue failure of a fan blade near the blade root that resulted in extensive low pressure compressor damage and compressor case breach.
The NTSB reported: "Metallurgical analysis concluded that the separated fan blade failed due to a high cycle fatigue crack that originated approximately 0.9375 inch aft of the leading edge on the suction side of the blade. Replicas (molds) were taken on six fan blades at points along the leading edge that were undamaged during the event and then superimposed over a representative new fan blade profile to measure leading edge erosion. Four of the six replicas were taken at blade chord positions that are repairable in accordance with the JT8D-17 repair manual. The measurements collected from the four replicas confirmed that all four had material loss within allowable limits, but three of the four blades had chord loss greater than P&W's erosion estimate of 0.035 inches for engines that had accumulated 11,000 engine cycles. The erosion estimates were created using field data from P&W PW4000 series engines which has the same fan blade material as the JT8D-17."
Aircraft Registration Data
Incident Facts
Date of incident
Aug 6, 2011
Classification
Incident
Cause
Rejected takeoff
Airline
Delta Airlines
Flight number
DL-2272
Departure
Atlanta, United States
Destination
Pittsburgh, United States
Aircraft Registration
N676MC
Aircraft Type
DOUGLAS DC-9-50
ICAO Type Designator
DC95
This article is published under license from Avherald.com. © of text by Avherald.com.
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