TOGA Tap was a published procedure for years especially when a low GA altitude is published, in the case above the TOGA TAP PROCEDURE wasn’t correctly applied and GA mode was never engaged so all that happened was the application of power, an associated pitch up leading the crew to assume a go around had commenced before the aircraft pitched down and accelerated towards the runway in an effort to recapture the Glideslope, Golden Rule. ‘Know your FMA’.