Load 15 can be set to print automatically but I think the default is for it not to print like this. Operators have to set the ACMS to do it.
As has been said the data is not a direct readout of vertical accel on touchdown because of the sampling rate. If you were lucky to hit the recording just right (pardon the pun!) it would still not read the true rate for reasons already explained by others. Some fairly complex calcs are required to work out if it was 'heavy' and sometimes Airbus have to be involved as well.
