ACBUS - No t/r on BACX 145 a/c as it adds half a tonne at the back end. This would mean we had to kick off 10% of our pax when MTOW restricted.
GRUNF - RP is right with the 145 carbon brakes they wear less when halfway up the amber band than when cold (source 145 maintenance conference)
It appears Embraer have a problem here. I understand the German AIB are investigating another 145 which overran a week or so before in similar conditions.
The aircraft will not allow "normal" pressure to be applied to the wheel brakes until the wheels are rotating at 50 knots. The 145 tyre pressure makes them prone to aquaplanning....so you can be pressing/releasing like hell and nothing happens.
The emergency brake does bypass the normal system but also bypasses the anti skid and on a dry surface is like hitting a brick wall if you apply at 10 knots...you really would not want to use it.
HAJ is built on a marsh and it has some of the worst CBs / rain showers in Germany. Apparently there had been a huge downpour just before the incident and the reports of poor braking action were not passed onto the BACX crew.