PJ The AT disconnected when the No1 engine went into reverse. The No2 engine would now maintain it current power setting. This was mentioned earlier with a power setting of 1.02.
"That involuntary ATHR disconnection allowed the thrust to be frozen on engine2 whose lever was at CLB notch." -Airbus.
http://www.asc.gov.tw/acd_files/188-c1contupload.pdf
The table on page 142 is interesting.
The engine would not spool up it would just remain as it was.
Jim