737NG A/T and A/P Go-Around

[nick14]

Thats an interesting viewpoint and I can see both sides.

Iv had it twice in the a/c and both times the A/T disengaged due to the split.

[K_9]

nick, I'm curious--at what point does the A/T disconnect? How much of a throttle imbalance?

[Capt Chambo]

If the A/T is engaged then a single push of TOGA gives you 1000/2000 fpm ROC, after they have started to advance a second push gives you full beans.

Not quite, you need to wait until the reduced N1 has been reached before you press the TO/GA button if you want full GA thrust.

From the Boeing 737NG FCOM. (My bolding)

With the second push of either TO/GA switch after A/T reaches reduced go–around thrust:
• the A/T advances to the full go–around N1 limit.

[Callsign Kilo]

nick, I'm curious--at what point does the A/T disconnect? How much of a throttle imbalance?

A thrust lever split of 10 degrees and greater rings a bell, however not 100% on that.

[McBruce]

10 degree split is correct.

[nick14]

Ah apologies, so after the thrust is set a second push will give you full beans.

It happened to me a while back watching one move and the other stay static and then the switch clicked off and the flashing red light warned us of the disconnect. I much prefer real life examples other than reading about them. You learn much more.

Cheers

[N1 Limit]

Thanks very much Callsing Kilo