Azerbaijan Airlines signed an MOU Wednesday for four Boeing 787-8s, which will take its Dreamliner fleet to 10 by 2030.

Baku-based Azerbaijan has two 787-8s in service alongside a fleet of Boeing 757, 767 and 777 aircraft.

Signing the deal at the Farnborough Airshow, Azerbaijan Airlines president Jahangir Asgarov said the MOU was “evidence of joint efforts to scale up the mutually beneficial partnership between Azerbaijan Airlines and Boeing.”

It was the second customer announcement for the 787 during the show. Earlier in the week, lessor AerCap ordered an additional five Boeing 787-9s, growing its Dreamliner portfolio and orderbook to 125.

Dreamliner deliveries remain suspended while Boeing works through production issues, although Boeing Commercial Airlines president and CEO Stan Deal said on the eve of the show that the manufacturer was “very close” to resuming deliveries.