The rare decay t --> cg induced through PGBs in the one-generation tec
hnicolour model (TC) have been calculated keeping all the masses. We h
ave found that these new contributions can enhance the sm branching fr
action B(t --> cg) from 10(-10) to 10(-5) for the favourable values of
the parameters. This might provide a unique window to detect the virt
ual effects of TC theory.