All Nippon Airways will cancel an additional 176 Boeing 787 services in the coming weeks, as it grapples with inspections for part of the fleet’s Rolls-Royce Trent 1000 powerplants.

The cancellations will take place up to 22 July, and adds to 113 cancellations from 6-12 July the carrier announced last week, says ANA.

“Over the last two years, we have been working very closely with Rolls Royce and the regulatory authorities,” it says. “However, due to the additional mandatory inspections that were announced by the Japan Civil Aviation Bureau (JCAB) on June 14, 2018, which involve twice as many engines to be inspected, we are cancelling a limited number of flights.”

The inspections affect the carrier’s 66 Trent 1000 Package C powerplants, and 70 Trent 1000 Package Bs. The Package B engines were added to the scope of mandatory inspections in June.

Flight Fleets Analyzer shows that ANA operates 64 787s comprising 36 787-8s and 28 787-9s. ANA is the largest operator of Boeing 787s powered by the Rolls-Royce Trent 1000 Package B engines, which have been newly included in the UK manufacturer’s inspection regime to deal with durability issues.

FlightGlobal Schedules shows that ANA had intended to operate 831 domestic 787 services from 6-22 July. The 289 cancellations comprise 35% of the carrier’s planned domestic 787 services during the inspection period.