Compressor failure in Marbore Engine

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Summary and conclusions• The reason that this cracks were not found until now is because themaintenance policy for NDT enabled choosing between inspection underlow magnification or fluid penetration (Zyglo) method.• From the other disks that were found with cracks, it can be concluded thatanother severe event was prevented due to this investigation.• From the amount of corrosion pits and the difficulty to see the coating itcan be concluded that the protective coating was damaged and was notaffective.• The probability of FOD (Foreign Object Damage) as a cause of the failurewas ruled out.– There were no signs for FOD over the stainless steel disk– Other disks were found cracked (with smaller cracks).24
Recommendations• Recommendations for overhaulmaintenance of the disks:– Define the maintenance policy for NDT onlywith fluid penetration method.– Renewal of the protective coating.– Measuring all the disks for anomalies in theradiuses of the tenons.– Examination of all the disks for stronglycorroded disks25
Page 1 and 2: Compressor disk failure investigati
Page 3 and 4: The event details• While "tzukit"
Page 5 and 6: 5The engine that failed after his d
Page 7: 7The parts are from the compressor
Page 10: The structure of the compressorThe
Page 13: Comparing between the disk that fai
Page 16 and 17: Fractography• Examination of both
Page 18 and 19: Fractography• Microscopic examina
Page 20 and 21: NDT by fluid penetration method.•
Page 23: Summary and conclusions• The engi

Compressor failure in Marbore Engine

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