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LPT
- Usado para
- low pressure turbine
- Fonte1
- INTERNATIONAL CIVIL AVIATION ORGANIZATION. Report by the second CAEP noise technology independent expert panel: novel aircraft-noise technology review and medium- and long-term noise reduction goals: report. Montreal, 2014. (Doc. 10017).
- Fonte2
- INTERNATIONAL CIVIL AVIATION ORGANIZATION. Aircraft accident digest n.38. Montreal, 2002. (Cir. 290 AN/168).
- Contexto
- The geared turbofan (GTF) technology allows the fan to be operated at lower speed and the low-pressure turbine and low-pressure compressor at higher speeds. This reduces the number of stages required in the compressor and turbine, reducing engine weight and part count and maintenance costs.
- The major technologies are advanced airfoil leading edge treatment, airframe shielding of forward propagating engine noise, thrust vectoring variable area nozzle and ultra-high bypass ratio engines with low idle thrust enabling low approach speed, low noise low pressure turbine design, optimized extensive liners for low engine noise, deployable drooped of leading edge, faired, low noise landing gear, advanced centrebody design that enables a low approach speed, suppression of flaps or slats and trailing edge brushes.
- The turbine disks and blades for the first through the fourth stages of the compressor, the low pressure turbine (LPT) and H I T shafts, and various vane airfoil and shroud fragments were removed and examined at the UAL Maintenance Operation Center at San Francisco, California. The inspection of the right engine and its associated components did not reveal any mechanical problems that would have precluded normal operation prior to impact.