THE FATIGUE FRACTURE OF THE COMBUSTION CHAMBER OUTER CASE. A FACTOR WAS THE MANUFACTURER'S INADEQUATE INSPECTION CRITERIA.
— NTSB Determination
DURING TAKEOFF, AN UNCONTAINED FAILURE OF THE LEFT ENGINE OCCURRED. AN EXAMINATION REVEALED A FATIGUE FRACTURE THROUGH A REAR FLANGE BOLT HOLE OF THE COMBUSTION CHAMBER OUTER CASE, AT THE THREE O'CLOCK POSITION OF THE ENGINE. THE ENGINE HAD BEEN INSPECTED IN ACCORDANCE WITH AN APPLICABLE AIRWORTHINESS DIRECTIVE; HOWEVER, THE FRACTURE OCCURRED 2,060 CYCLES PRIOR TO THE NEXT SCHEDULED INSPECTION. ADDITIONAL INSPECTION REQUIREMENTS RESULTED FROM THE EXAMINATIONS OF THE ENGINE AND THE FRACTURE.
DURING TAKEOFF, AN UNCONTAINED FAILURE OF THE LEFT ENGINE OCCURRED. AN EXAMINATION REVEALED A FATIGUE FRACTURE THROUGH A REAR FLANGE BOLT HOLE OF THE COMBUSTION CHAMBER OUTER CASE, AT THE THREE O'CLOCK POSITION OF THE ENGINE. THE ENGINE HAD BEEN INSPECTED IN ACCORDANCE WITH AN APPLICABLE AIRWORTHINESS DIRECTIVE;…
The accident on 1994-05-05 involved a Douglas DC-9-32, registration N986US, operated by Northwest Airlines, Inc, at Memphis, TN.
THE FATIGUE FRACTURE OF THE COMBUSTION CHAMBER OUTER CASE. A FACTOR WAS THE MANUFACTURER'S INADEQUATE INSPECTION CRITERIA.
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