BA owns/leases 57 747-400s. The one aircraft which has been on lease to QANTAS was due to return in March, but will not now do so, and will be staying with QANTAS at least for the summer. Three aircraft were planned to be mothballed in March but this will no longer happen. These aircraft will go to either Cardiff or Cambridge to complete their 'Dusk' modifications, which will be in the 'low J' configuration.. .The reason is not so much the resale values as the high forward M class bookings for the summer.
Airclues