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The Williams International FJ44-4A-QPM turbofan, which powers the new Pilatus PC-24 twinjet, has received type and production certification from both the FAA and EASA. Production deliveries of the engines to Pilatus Aircraft have begun, Williams said. PC-24 certification is expected by year-end, according to Pilatus.
These engines are each rated for 3,435 pounds of normal takeoff thrust at ISA+8, and more than 5 percent added thrust is available, if needed, through a new automatic thrust reserve feature, the company noted. Other new features of the FJ44-4A-QPM include an anti-ice and noise-suppressing inlet; integral pre-cooler to condition engine bleed air and reduce drag losses; and passive thrust-vectoring exhaust nozzle technology.
The PC-24 will also be the first FJ44 application to take advantage of Williams’s “Quiet Power Mode,” which allows the engine to provide “quiet, efficient ground power,” eliminating the need for a traditional APU. In addition, the FJ44-4A-QPM is the first FJ44 model to be certified with Williams's “latest and most advanced” Fadec that will be incorporated into all models in the FJ33/FJ44 turbofan family. Engine TBO is 5,000 hours, with an on-wing hot-section inspection at 2,500 hours.
The Williams International FJ44-4A-QPM turbofan, which powers the new Pilatus PC-24 twinjet, has received type and production certification from both the FAA and EASA. Deliveries of production engines to Pilatus have begun, and the Swiss airframer expects the PC-24 to receive certification by year-end.
The PC-24's engines are each rated at 3,435 pounds of normal takeoff thrust at ISA+8, and 5 percent more thrust is available, if needed, through a new automatic thrust reserve feature, Williams noted. Other new features of the FJ44-4A-QPM: an anti-ice and noise-suppressing inlet; integral pre-cooler to condition engine bleed air and reduce drag losses; and passive thrust-vectoring exhaust nozzle.
The PC-24 will be the first FJ44 application to take advantage of Williams’s quiet power mode, which allows the engine to provide “quiet, efficient ground power,” eliminating the need for a traditional APU. In addition, the -4A-QPM is the first FJ44 to be certified with Williams's “latest and most advanced” Fadec, which will be incorporated into all FJ33/FJ44 models. Engine TBO is 5,000 hours, with an on-pylon hot-section inspection at 2,500 hours.