Originally Posted by boybi

From Airlineroute:

Cathay Pacific in the last few days gradually outlined planned operation with its re-configured Boeing 777-300 and -300ER, featuring 3-4-3 layout in Economy Class (instead of 3-3-3). The re-configured aircraft is gradually loaded in the reservation system as well as the OAG, starting June 2018.

777-300ER J40W32Y296
eff 19JUN18 Hong Kong – London Heathrow
eff 01JUL18 Hong Kong – Rome
eff 01OCT18 Hong Kong – Johannesburg