• Overhaul of the ВК-2500 engines;
• Upgrading of the ТВ3-117 engine to the ВК-2500 engine during overhaul;
• Reconditioning repair of the ВК-2500 engine at operator`s facilities.

2. An exceptional prerogative of the Designer is extension of the life limits in accordance with the Decision of General Designer: 

• The TV3-117 (ТВ3-117) engine
  

- Extension of the service life between overhauls considering technical condition up to 2,000 hours.

- Extension of the service time (storage time period) up to 19 years.

• The TV3-117 A(AG) (ТВ2-117А(АГ)) engine
  

- Extension of the service time (storage time period) up to 19 years.

• The VR-14 (ВР-14) gear box
  

- Extension of the assigned service life up to 8,000 hours.

- Extension of the service life to the first overhaul (service life between overhauls) up to 4,000 hours. 

- Extension of the service time (storage time period) up to 17 years.

• The VR-8 (A) ( ВР-8(А)) gear box
  

- Extension of the service time (storage time period) up to 17 years.        

• Leading operation of the TV3-117 (ТВ3-117) engine and the VR-14 (ВР-14), VR-252 (ВР-252) gear boxes.
  

ATTENTION! Acts of the technical condition evaluation are approved exclusively by an authorized person of JSC “UEC-Klimov” and sealed with the official stamp of the company. JSC “UEC-Klimov” has not authorized representatives of other companies, organizations and third persons to perform works on extension of the life limits.