Japanese carrier ANA is suspending two of its flights to Hong Kong over the coming months along with a long-haul service to Los Angeles, as it undergoes mandatory inspections of the Rolls-Royce Trent 1000 engines on its Boeing 787 Dreamliner aircraft that fly the routes.

In a statement on its official website, the airline outlined the planned suspensions, which will be in effect across certain dates starting September 1 until October 28.

From September 1-27, flights NH809 and NH810 between Tokyo Narita and Hong Kong will cease to operate, bringing the airline’s frequency on the route down from twice daily to one flight per day during this time. The flight is expected to return after September 27 and will continue to operate throughout October.

Meanwhile, ANA’s only flights between Nagoya (Chubu) and Hong Kong – NH875 and NH876 – will be suspended from September 1-27, and from October 14-27.

Along with the carrier’s two Hong Kong services, the only other international flights to be affected will be NH176 and NH175 that operate between Tokyo Narita and Los Angeles.

Flights on this route will be a bit more sporadic during the suspension period, with flights being cancelled on the following dates: September 7, 10, 14, 18, 19, and then from September 21-30; October 2, 4, 6, and then from October 8-27.

ANA will also be cancelling certain domestic flights during September and October.

A number of airlines already have had to ground their Boeing 787 Dreamliner aircraft in order to conduct mandatory inspections after it was revealed that parts of the engines that power them, the Rolls-Royce Trent 1000, were not lasting as long as anticipated.

The issue is industry-wide and precautionary in nature, and should not cause concerns about flight safety.

ANA is expected to announce further cancellations for the upcoming winter schedule on August 21.