After reading all BMM, SSM, WDM Ch 22, 31, 34 & 76 until my eyes bled, there is no input to the A/T system that will command any change of logic when T/R is selected. (Especially when selecting T/R the EPR reversion mode is entered N1 control, as stated earlier on the RR).
The EIU's will receive and I quote from BMM:
G. Engine Interface (Fig. 68)
(1) Digital information such as EPR, EGT, rotor speeds, thrust reverser
position, engine rating and oil data is received by the EIUs on
ARINC 429 data buses from the Electronic Engine Controllers (EECs).
This data is processed for display on the EICAS primary, secondary
and compacted formats, and the EICAS performance, EPCS, engine
exceedance and configuration maintenance formats.
During LAND the A/T is in SPD mode until 30ft when it enters flare IDLE mode and becomes dormant. G/A ARM mode is enabled awaiting a TOGA input to go into G/A ENG mode. If TOGA is initiated and flaps are still deployed T/L will advance, there is a good chance it will increase thrust even during R/O & taxi off the RWY (something to try in the sim thanks guys).
After this I will give up 