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Series: All
Helicopter upgrade
To  improve the technical and operational characteristics of radio aids, the out-of-production Baclan-20 VHF radio station is replaced by Orlan-85ST VHF radio station.


  • Sustainable and  high quality communication;
  • The continuous monitoring of 121 MHz emergency signal;
  • The cost of flight hour is reduced due to reduction of maintenance expenditure;
  • High reliability and ergonomics;
  • The frequency band is expanded up to 137.975 MHz.
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Applicable bulletein

Bulletin № Applicable
АМТ3883-БУ/БЭ Ми-171Е

Requisition of work perfomance

Place of work performance

At the current location of the helicopter
or at the Aviation Repair Plant (ARP)

  • Certified Maintenance Organizations
  • ARP
The information posted on the JSC "HSC" website in "Upgrade" section is for reference only. Please send us an official request for relevant technical information.