Chris,
Thanks,
I used "units" because I too have not flown the A330. Your "2 deg NU plus-or-minus 2 deg " looks like what I was trying to say.
But to fly very much out of this kind of range without good reason - and apparently without noticing or comment...
My fairly ordinary car has an oil pressure gauge which is backed up with an oil-pressure warning light. This would come on if the oil pressure fell below a certain figure. The system was installed when the car was made.
(As a York F/O I could notice an increase of 1 or 2 Kts when the Captain went back to the rear toilet, when hand flying with A/P U/S-, Captains weighed more as a percentage of A.U.W., then .)