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Printed page 1. PDF page 9.
injuries, and damage was limited to the left engine. Why it happened 1.3. An engine low-pressure turbine blade failed. This caused a vibration and failure of internal air seals, which allowed oil to flow directly into the engine. 1.4. TheOpen final report at PDF page 9ATR72-600, ZK-MVL Engine fire and evacuation Wellington 1 September 2024
Printed page 16. PDF page 24.
adversely affect future 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 theOpen final report at PDF page 24ATR72-600, ZK-MVL Engine fire and evacuation Wellington 1 September 2024
Printed page 30. PDF page 38.
4 Findings Ng kitenga 4.1. The engine fire warning was initiated by a failure of a low-pressure turbine blade, which resulted in a vibration in the engine that caused deterioration to some air seals, allowing oil to leak directly intoOpen final report at PDF page 38ATR72-600, ZK-MVL Engine fire and evacuation Wellington 1 September 2024
Printed page 31. PDF page 39.
issue a recommendation to 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 theOpen final report at PDF page 39ATR72-600, ZK-MVL Engine fire and evacuation Wellington 1 September 2024
Printed page vi. PDF page 8.
......................................................................................... 9 Figure 9: Low-pressure turbine disc showing location of failed blade ...........................................11 Figure 10: Lower portion of the failed LPT blade ...............................Open final report at PDF page 8ATR72-600, ZK-MVL Engine fire and evacuation Wellington 1 September 2024
Printed page 9. PDF page 17.
examination or replacement of its individual components. This included replacing the low-pressure turbine (LPT) disc that was becoming time- expired and testing19 the 47 LPT blades. It was then reassembled (see Figure 8). Figure 8: P&WC PW127M engine cutaway (Credit:Open final report at PDF page 17ATR72-600, ZK-MVL Engine fire and evacuation Wellington 1 September 2024