Description of the engines:
Powerplant: 3 x Lotarev D-36 turbofan engines, 63.75 kN (14,330 lbf) thrust each.
Design and development.
The engine was developed for the Yak-42, An-72 and An-74 aircraft and was very advanced when it was first introduced in the 1970s. The engine was designed by Vladimir Lotarev. The first test runs began in 1971, first flight tests followed in 1974, serial production began in 1977.
The engine has a single-stage fan with 29 titanium blades and a Kevlar outer shell, which is driven by a three-stage turbine. The six-stage low pressure compressor with titanium blades is driven by a single-stage non-cooled low pressure turbine. The seven-stage high-pressure compressor with steel blades is driven by a steel bladed high-pressure turbine.
Since the tradition in the Soviet era was to gradually and continuously improve engines in serviceability, engines went from Series 1 to 3A (depending on the application). The Series 1 (used on Yak-42D) did not feature any reverse thrust system however, series 1A to 3A were fitted with bucket-type thrust reversers (used on An-72/An-74). The most recent upgrade (after the Soviet breakup) is Series 4A which has been in manufacture since 2002. Improvements included updated curved titanium blades and a built-in reverse thrust device. More advanced blade design along with proprietary wear-resistant and heat-protective coatings have resulted in improved specific fuel consumption (kg/h/kgf) dropping from 0.65 to 0.63. Specified service life has also improved exponentially to 40,000 hours.
Established. In addition to the standard: TCAS-II Rockwell Collins, KLN-90, such as emergency beacons ARM-406, altimeters --.
All the improvements, the mandatory
Status of the inspection:'
By Decision No. -42-601-05 of 11.07.2005 the aircraft has been assigned the assigned resource: 30,000 flight hours, 18,000 flights, 30 years (until August 31, 2017)
The procedure for individual extension of the assigned resource to 40,000 flight hours, 18,000 flights and a service life of 35 years has been established.
The aircraft is fully prepared for flights.
Maximum take-off weight: 57 500 kg
Maximum charge: 18 500 kg
Empty weight: 32 694 kg (32 994 kg.)
Centering: 46.7% of
Non-standard equipment: KLN-90, emergency beacons -406, TCAS-II, altimeters --.
TC - 10,000 was performed with 11 997 flying hours, 6 831 flights,
TC - 20 000 with a running time of 25 000 flying hours, 12 956 flights, 22 years
The last periodic maintenance order: Form-44, #-3 calendar work at 6, 12, 18, 24 months, Estimation of the airframe of the glider, preparation for flights (including -1) when operating the - 26 306 flying hours, 13 538 landings.
Regular Periodical Technical Inspection: Form-45
Flights in September: (0 hours) the aircraft is in storage