Gents
Basically, "Thrust Bump" is a system fitted to the IAE V2500-A1 engine, and it is used to obtain an additional thrust capability during takeoff. It is selected by 2 guarded red pushbuttons on the thrust levers, and activates when the thrust levers are advanced to the TOGA detent after selection via the pushbuttons. It corresponds to an approximate 10% increase in thrust. There are various other engagement and disengagement conditions which I can't be arsed to type out. I'm sure you get the idea! It can be used in two engine or single engine operation.
It is not fitted to the later versions of the V2500 (eg the A5 version) due to their increased thrust.
If you need any further info on the above - please feel free to email.
Hope this helps
Enjoy your new job!!
[ 04 November 2001: Message edited by: SLT ]