Icepack and Owain, thank you both for the correction.
From the BEA final report (English version),
The balance corresponding to the aeroplane’s takeoff weight and shown on the final
load sheet (after LMC) was 23.3% of the MAC (mean aerodynamic chord), which was
within the limits.
The recorded data indicates that at the time of the event, the aeroplane’s weight was
205.5 tonnes and the balance was 28.7%, which was within the limits.
From a A332 CG chart, the max inflight aft CG for 205 kg x 1000 (is that the same as 205 tonnes?) is about 39%, so obviously much more aft CG was available to AF447.
The trim tank was apparently able to move the CG aft ~5%. Probably Owain can provide a more complete estimate.