Yak has close contacts with PBS Velka Bites (Czechia) that supplies APU Safir-5J, with THALES A.E.S. company - AC Generator supplier and LEACH INTERNATIONAL EUROPE S.A that delivers electrical automatic units.

JSC "Yak" took part in ATP-42 aircraft updating program initiated by ALENIA Company (Italy) and performed some design work for new compartment arrangement.