the official reply from RJ
Please note that RJ has started renovating its 3 Airbus A310 aircraft at a JD10 million cost. The newly renovated airplanes will be operated on the Amman-Bangkok route. One of the three revamped aircraft is now in service with the new configurations.
But I think one new 310 aircraft is not enough to operate BKK route. So I guess some flights to BKK may be with new Crown class and some will be with old Crown class. I would appreicate if anyone can offer latest flight report