At the February 2016 Singapore Airshow, Bombardier announced a high-density, 90-seat layout of the Q400, which should enter service in 2018; keeping the seat pitch of the Nok Air 86-seats, an extra row of seats is allowed by changing the configuration of the front right door and moving back the aft pressure bulkhead. The payload is increased by and the aircraft maintenance check intervals are increased: 800 hours from 600 for an A-check and 8,000 hours from 6,000 for a C-check.