GE Aviation on Tuesday won a huge contract to provide engines and support to Abu Dhabi-based airline Etihad Airways, which is getting ready to launch a new fleet of 45 large commercial jets.

The general electric unit’s engine order alone is worth $2.2 billion while the maintenance, repair and overhaul service fetched $1.7 billion.

“This order marks a significant milestone in our relationship with GE,” said James Hogan, the chief executive of the airline, who called the engines “more fuel efficient” and among the most technologically advanced products available.

David Joyce, president and CEO of GE Aviation said the company is “extremely honored” it was chosen.

GE Aviation will provide its GEnx-1B engines for 35 Boeing 787-9 aircraft and GE90-115B engines for 10 Boeing 777-300ER aircraft.