Dublin-based Milestone Aviation Group has delivered two Sikorsky S-92 helicopters to CITIC Offshore Helicopter Company, part of Chinese conglomerate CITIC.
Milestone's emerging markets head Michael York said the lessor looked forward to working with CITIC "for many years to come".
CITIC first took one of Milestone's helicopters in 2014 and said the delivery this week of two more marked "another win-win achievement".