The Aviadvigatel PS-90 is a Russian high-bypass commercial turbofan rated at 16000 kgf (157 kN, 35,300 lbf) thrust. It powers Russian airliners such as the Ilyushin Il-96 and the Tupolev Tu-204/Tu-214 series and transport aircraft such as the Ilyushin Il-76. It is made by the Russian aircraft engine company Aviadvigatel, which is the successor of the Soviet Soloviev Design Bureau. “PS” are the initials of Pavel Aleksandrovich Soloviev (Russian:Павел Алеќсандрович Соловьёв).

With the advent of new generation of Russian airliners, Aviadvigatel developed the PS-90 to satisfy the demands of economy, performance and exhaust emissions. It represented a huge advance over previous generations of 1960s era Soviet engines. The PS-90 is almost double the efficiency of those engines and is reasonably competitive to the current generation of western engines.

It incorporates many firsts in a Russian engine with advanced technology features such as
High-bypass turbofan design for economy
Integrated exhaust with exhaust mixer for good efficiency
Acoustically treated exhaust duct for low noise
Full-authority digital engine control (FADEC)
Long service life based on on-condition maintenance
Modular design for ease of maintenance
It was first certified in 1992 and has been in service since. Approximately 300 had been built to 2010.

Variants:
There are five variants; the basic PS-90A, the PS-90A-76, the improved PS-90A variants, PS-90A1 and PS-90A2, and the PS-90A-42 turbojet.

PS-90A
The PS-90A engine is the initial variant and is standard equipment for Ilyushin Il-96-400, Tupolev-204-100 and the Tupolev-214. For the first time it allowed Russian airliners to achieve similar performance and economy to their western counterparts. PS-90A is rated nominally at 16000 kgf (157 kN, 35,300 lbf) thrust, 13.3% less than the original Rolls-Royce RB211-535E4 engine (which are also offered on the Tu-204), and the fuel consumption is 8.2% less than it.

PS-90A-76
This variant is a modification of the basic PS-90A engine. It extends the service life of the Il-76 transport airplanes and raises their efficiency by installation of the PS-90A-76 engine instead of the D-30KP. It transformed these airplanes into the quiet, economical and extended range variant, the Ilyushin Il-76MF. It is rated nominally at 14,500 kgf (142 kN, 32,000 lbf) thrust.

PS-90A2
The PS-90A2 is an advanced derivative of the PS-90A,developed in co-operation with Pratt & Whitney. It has a proportion of components from France, Germany, Sweden and the USA. It is lighter than PS-90A and features improved FADEC. These features improve the performance and reduce maintenance costs by 40%.. The PS-90A2 is the first Russian engine to be ETOPS-180 min rated. It was offered in newly built aircraft and is completely interchangeable with the PS-90A.
It has the same thrust rating as the PS-90A, 16000 kgf (157 kN, 35,300 lbf) thrust. It is also capable of 18000 kgf (176 kN, 39,600 lbf) thrust.
Future American involvement in engine development has been put in doubt after attempts to block sale of PS-90A2 engines to a major Iranian customer for the type.

Specifications:
PS-90A1
Type: Twin-spool high bypass turbofan with a single-stage fan
Length: 4,964 mm (195.4 in)
Fan diameter: 1,900 mm (75 in)
Dry weight: 2,950 kg (6,500 lb)
Compressor: 2-stage LP, 13-stage HP
Combustors: Fully annular
Turbine: 2-stage HP, 4-stage LP
Maximum thrust: 17,400 Kgf; 38,400 lbf (171 kN)
Bypass ratio: 4.4
Fuel consumption: 0.595 kg/kgf hour

The Soloviev D-20P was a low-bypass turbofan engine rated at 52.9 kN (11,900 lbf) thrust. It was built by the Soloviev Design Bureau. The engine was used on the Tupolev Tu-124.

Type: Twin-spool turbofan engine
Dry weight: 1,468 kg
Compressor: Three-stage LP, eight-stage HP, axial flow
Combustors: 12-chamber cannular
Turbine: Two-stage LP turbine, single-stage HP turbine
Maximum thrust: 5,400 kg
Overall pressure ratio: 13:1
Bypass ratio: 1:1