Some customers are being told Norwegian B787, but, I was under that fleet was already stretched, and, the seat plans for some flights show a 52 row cabin, in a 2-3-2 premium and 2-4-2 economy.
The seat plan is a TCS A330-300. Overhead screens and 29" seat pitch. It's covering for a month during while the second A330 is off for refurbishment.