PS-90A3u, PS-90A3u1, PS-90A3u-76 turbofans

TU-204
PS-903u
engine is a modification of PS-90 engine.

It is designed to power IL-96-300, U-204/214 aircraft.

PS-903u-76 engine is a modification of PS-90-76 engine.
It is designed to power U-204/214 aircraft.

PS-903u1 engine is a modification of PS-90 engine.
It is designed to power IL-96-400 aircraft.

Fundamental distinctive features of PS-903u engine (PS-903u-76, PS-903u1) as compared to PS-90 engine

  • cooling of HPT 1st stage blades by air taken at HPC 10th stage instead of the 7th stage in order to improve life and reliability;
  • installation of  FAG bearings in HPC and HPT bearing compartments having large life and high reliability;
  • implementation of a new lubrication and breather system with a "hot" oil tank and oil pressure varying proportionally to the high pressure rotor rotation speed (without reducing valve);
  • application of pneumatically-driven accessories having several critical benefits as compared to similar accessories with a  hydraulic drive;
  • implementation of design improvements of HPT and combustor which have been tested and mastered at PS-902 engine;
  • application of automatic control system and engine on-board monitoring system from the PS -902 engine;
  • installation of  D-90 temperature detector in the bypass duct.

BENEFITS of PS-903 PS-903U ENGINE (PS-903U-76, PS-903U1) AS COMPARED TO PS-90 ENGINE

  • 1.5... 2 times higher reliability.
  • Increase of major components life up to 10, 000... 15, 000 cycles.
  • Increase of purchased components life up to 60, 000 hours.
  • 2 times higher TBO.
  • Achieving v1 margin up to 75.
  • Usage of repeatable emergency power.
  • Reduction of flight hour cost.
  • Reduction of maintenance labor input by 30 %.
  • Wide application of accessories with a pneumatic drive.

Advantages of PS-903U (PS-903U-76, PS-903U1) engine operation

  • Increase of the engine mean time between shop visits will provide airlines with more intensive aircraft operation due to reduced down-time caused by engines replacement and will reduce the number of overhauls made by the manufacturing company. The time of the engine being in MRO will be 22 months instead of 50 during the life cycle.
  • Improved reliability of the engine will make it possible to minimize flight delays and after-flight maintenance time.
  • Larger v1 margin, new design and HPT cooling system enable to maintain constant thrust of the engine during its operation.
  • Reduction of maintenance labor input up to 0.2 man/hour for 1 hour of flight due to increased periodicity and reduced scope of maintenance make it possible to reduce airlines expenses for the engine maintenance by 30 %.
  • Fuel consumption reduction up to 4% for 10 ths. hours due to high stability of components efficiency especially of HPT efficiency.
IL-96-300

PS-903U, PS-903U-76, PS-903U1 engines will be certified in accordance with Civil Airworthiness Requirements-3 Chapter 6.