Hi:Can someone please explain the correct procedure for using TOGA buttons.Take off - FD on, AT on, 40% N1 stabilize then push TOGA for take off roll - pretty straight forewordWhat about using TOGA for go around? Does the AP, AT FD need to be on? Will TOGA work on full manual land (AT and AP off, but FD on)?I read (somewhere) that one push gives you reduced take off speed, then another push gives you full speed - not sure if this is right.I can't seem to find anything definitive on the correct procedure.Help appreciated, Thank you, Iain

TOGA does not require AP or AT. Just like a takeoff with the FD on, you are able to do so without AP or AT. If you are configured for an Autoland, you can do an automated go-around. This is different from what you were thinking: the first push gives you a reduced N1 that will result in a 1000-2000fpm climb a second push will give you full go-around thrust. The speeds remain the same when they are controlling.

Thanks Matt, I'm guessing then that the TOGA will also kick in if depressed with the AT on ? Iain

TOGA will engage irrespective of A/T. Remember that TOGA is guidance for the flight modes and/or N1. If the A/P or A/T are on, they then will follow that guidance.

TOGA will engage irrespective of A/T. Remember that TOGA is guidance for the flight modes and/or N1. If the A/P or A/T are on, they then will follow that guidance.

Matt.So you are saying if I am doing Flight Director go around wit A/P and A/T off, engaging TOGA button will engage irrespective of A/T?If so, mine is not working that way for some reason.

Ed,As Matt mentioned, TOGA is guidance, it is not a mode that takes control of the aircraft. If the AP and AT are off, but you have the FD on, it's up to you to set the throttles and follow the FD manually with the yoke. If AP and AT are on, they will follow those commands for you.If you need to think about it in a different way:Leave the AP off, but configure yourself for an approach (Nav freqs and courses) and hit APP on the MCP. If the FD is on, you can follow that down to the runway. If the AP is on, it will follow it for you. Similarly, if you hit TOGA without the AP or AT on, it will just provide guidance (FD) and thrust limits (for the throttles).If AT is off and you hit TOGA, it will not auto-engage AT. Nothing can auto-engage AT, to be honest. You have to manually flip the switch.

Hi,Some good info here, but not all correct. You need to look at three distinct cases:-AFDS configured for autoland: Autopilot A & B BOTH engaged with localizer and glideslope captured AND flare armed annunciated. Autothrottle is engaged.Pushing the toga button will engage go around mode. Autothrottle will move forward to produce reduced GA thrust. Autopilot will remain engaged and will pitch up to follow flight director GA guidance.-AFDS configured for manual landing: Autopilot A OR B engaged and autothrottle engaged.Pushing toga will again engage go around mode. Autothrottle will move forward to produce reduced GA thrust. Autopilot will DISCONNECT, you will have to take control and manually follow flight director GA guidance.-AFDS configured for manual landing after autopilot is disconnected.Pushing toga will again engage go around mode, you will have to manually move the throttle forward and pitch up to follow flight director GA guidance. Reduced GA thrust is somewhere around 85% N1, this doesn't have to be set super accuratly, in the real aircraft you just strech your arm and that will usually give you an acceptable thrust setting ( called the "boeing arm")Note that even if both flight directors are switched off pushing toga will make them "pop up" on the PFD.About the thrust setting: pushing toga once gives you reduced GA thrust: GA will be annunciated on the thrust mode display (green letters just above your N1 indicators).The N1 produced will be around 10% below the green carrets on the N1 indicators. This will produce a rate of climb of between 1000 and 2000 fpm. More than enough for almost every normal go around.Pushing toga a second time produces maximum GA thrust. N1 will be annunciated on the the thrust mode display. The N1 produced will be on the green carrets on the N1 indicators. Should normally only be used in case terrain seperation is doubtfull.cheersMarijn De Gusseme

i read this post, but when i am trying to engage the TOGA with out AT armed, it wont engage toga. thanks.

TOGA will only engage if below 2000ft radio altitude or above 2000ft radio altitude but with the flaps not up.Are you in those conditions?CheersMarijn De Gusseme

Edited March 1, 201214 yr by hawkeye_55

i read this post, but when i am trying to engage the TOGA with out AT armed, it wont engage toga. thanks.

When you say TOGA won't engage, are you saying you don't get TOGA guidance or that your thrust levers don't move? Remember, TOGA is not the movement of the TLs.

When you say TOGA won't engage, are you saying you don't get TOGA guidance or that your thrust levers don't move? Remember, TOGA is not the movement of the TLs.

Oh, now i get it, so i need to pull the throttle manually?

You need to push the throttle to TOGA thrust manually if the A/T is off. As everyone explained simply clicking TOGA only activates go around guidance.Regards

Also .... gear up - cleanup ...

Oh, now i get it, so i need to pull the throttle manually?

Sometimes I wonder if people actually read what I volunteer my time to type:

TOGA will engage irrespective of A/T. Remember that TOGA is guidance for the flight modes and/or N1. If the A/P or A/T are on, they then will follow that guidance.

As Matt mentioned, TOGA is guidance, it is not a mode that takes control of the aircraft. If the AP and AT are off, but you have the FD on, it's up to you to set the throttles and follow the FD manually with the yoke. If AP and AT are on, they will follow those commands for you.

-AFDS configured for manual landing after autopilot is disconnected.Pushing toga will again engage go around mode, you will have to manually move the throttle forward and pitch up to follow flight director GA guidance.

Edited March 1, 201214 yr by scandinavian13

Sometimes I wonder if people actually read what I volunteer my time to type:

i am sorry, i haven't noticed.