To make it clear, I set the new FL, pulled for OPEN CLB, read the FMA, the N1 was on it's way to reaching maximum CLB thrust. At this stage I dialed in the new speed, the N1 fell backwards to chase the speed, not the pitch!
15 years of operating this aircraft, this is not the logic I have experienced before. I've flown MSN 300 all the way to 7000. In fact, I flew LEAP based NEOs for another company, and it didn't happen with those either. I'm now flying LEAP based NEOs that are under 1 year old and see this happening. My very experienced colleague said he too has never seen this behaviour before on A330s, A340s or A350s.
Last edited by CW247; 11th Oct 2023 at 16:26.