All Nippon Airways, Asia’s largest listed carrier by sales, agreed to purchase 11 more Boeing 787-9 aircraft to expand its fleet as it adds international routes.

The planes are valued at $3.3 billion at list prices and are scheduled for delivery in fiscal years 2018 to 2021, the carrier said in a statement.

All Nippon, the first to fly the 787 Dreamliner commercially, announced the purchases two months after selling about $2.3 billion in new shares to finance fleet expansion. The airline has said it is benefiting from the introduction of fuel-efficient Boeing 787s on flights to Frankfurt in January and on domestic routes.

The airline plans to switch its Narita to Seattle service to 787 aircraft on Oct. 1, and make a switch to 787s for flights between Tokyo Haneda and Beijing from Oct. 28.

It plans to add services from Tokyo Narita to San Jose, California, starting January with the 787, according to the statement.

When added with existing orders, the purchases announced Friday will bring ANA’s Dreamliner fleet to 36 B787-8 aircraft and 30 B787-9 versions.

The company had initially ordered 55 of the planes, 13 of which have been delivered, according to today’s statement.

ANA is the largest airline customer for the 787 and second overall after ILFC Holdings, which has 74 orders, according to Boeing’s website.

Five of ANA’s Dreamliners were temporarily grounded in July because of faulty engine parts and have returned to service.

FAA orders GEnx engine inspections

A Federal Aviation Administration directive requiring frequent inspections of the GEnx engines used on Boeing’s 787 and 747-8 planes took effect Friday, a week after the National Transportation Safety Board recommended action.

The FAA said the engines must be inspected every 90 days for signs of cracking in the fan mid shafts.

A GEnx-1B engine on a 787 shot out hot metal debris during a runway test in North Charleston, S.C., on July 28.

In mid-August another engine was found with a cracked mid shaft, the agency said.

The NTSB also reported that a GEnx-2B engine on a 747-8 freighter flown by AirBridgeCargo lost thrust during takeoff from Shanghai this month.

The FAA directive estimates each engine inspection will take about nine hours of work.