A320 vibration
Yesterday I flew from AMS to LHR as pax in an A320. I'd fallen asleep before we took off, but woke up as we were in the climb, and noticed an odd vibration. I was seated in 26A.
It was low-frequency and of reasonable amplitude - by that I mean I could feel my seat moving because of the vibration. The vibration disappeared as we started the descent.
I dithered about mentioning it to the cabin crew, but ended up not doing that. I'm curious as to what could have been the cause, and whether it's worth further digging. My wife mentioned that when she flew LHR - AMS some days before the A320 she was on suffered a similar vibration, but apparently with bigger amplitude - she said she could see the wall panels moving.
I'm not trying to point blame, nor dig up problems unneccesarily but I thought the vibration was so unusual it was worth trying to see if it's "normal" or not. I do fly with this airline and others frequently, and on A320s quite regularly, and have never experienced this before.
Any ideas ?