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Printed page 11. PDF page 19.
number HWTE3998. Initial assessment of the fracture surfaces suggested the blade had failed because of fatigue. There was also damage on the upstream face of the LPT disc (see Figures 9 and 10). The LPT disc is fitted with 47Open final report at PDF page 19ATR72-600, ZK-MVL Engine fire and evacuation Wellington 1 September 2024
Printed page 16. PDF page 24.
operations. Engine failure and examination Safety issue 1: A low-pressure turbine blade failed because of fatigue. The engine manufacturer's quality assurance procedures during the recent engine overhaul did not identify the issue, increasing the risk of other similarly faOpen final report at PDF page 24ATR72-600, ZK-MVL Engine fire and evacuation Wellington 1 September 2024
Printed page 19. PDF page 27.
examination reports and supporting documents,30 the Commission found that the LPT blade failed because of fatigue. 3.18. The Commission also found that a second LPT blade on the engine had evidence of fatigue similar in nature to the failed blade.Open final report at PDF page 27ATR72-600, ZK-MVL Engine fire and evacuation Wellington 1 September 2024
Printed page 30. PDF page 38.
remained and so the captain ordered an evacuation. 4.3. The low-pressure turbine blade failed because of fatigue. 4.4. A second low-pressure turbine blade also had evidence of fatigue. 4.5. While the Commission was unable to definitively determine when the fatigueOpen final report at PDF page 38ATR72-600, ZK-MVL Engine fire and evacuation Wellington 1 September 2024
Printed page 31. PDF page 39.
address the issue. Engine airworthiness Safety issue 1: A low-pressure turbine blade failed because of fatigue. The engine manufacturer's quality assurance procedures during the recent engine overhaul did not identify the issue, increasing the risk of other similarly faOpen final report at PDF page 39ATR72-600, ZK-MVL Engine fire and evacuation Wellington 1 September 2024