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Baro knob operation question

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Passing the transition altitude and pressing STD, should that change the baro number to standard pressure? In other airplanes, it remembers your last setting so when pressing STD again, it goes back to what it was previously set at. Is the 777 different?

 

David Frank

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Is the 777 different?

 

Yes.  You pre-set it (it'll show up smaller underneath the "STD" text), and then press STD.

 

Remember that the 777 is an aircraft that flies some pretty long legs.  As such, the BARO setting is likely going to be completely different such that remembering the setting prior to hitting STD would be completely worthless.  The world is vastly dynamic, weather-wise.  After 8-12 hours of flying, the baro setting in one area alone is going to be vastly different...

 

12 hours at KILM recently:

KILM 040653Z AUTO 27012KT 10SM CLR 25/22 A2987 RMK AO2
KILM 040553Z AUTO 27015KT 10SM -RA SCT020 BKN043 BKN060 25/22 A2985 RMK AO2
KILM 040453Z AUTO 28016G24KT 10SM BKN015 OVC022 25/22 A2982 RMK AO2
KILM 040353Z AUTO 27020G30KT 10SM BKN016 OVC023 24/22 A2976 RMK AO2
KILM 040338Z AUTO 26021G28KT 10SM SCT016 BKN023 25/22 A2976 RMK AO2
KILM 040253Z AUTO 29019G29KT 10SM FEW015 SCT100 BKN110 24/22 A2971 RMK AO2
KILM 040232Z AUTO 30021G35KT 10SM FEW010 BKN015 OVC090 24/22 A2970 RMK AO2
KILM 040203Z AUTO 30021G32KT 10SM -RA BKN010 BKN029 OVC040 24/22 A2968 RMK AO2
KILM 040153Z AUTO 29026G34KT 4SM -RA BR SCT012 BKN029 OVC040 24/22 A2967 RMK AO2
KILM 040150Z AUTO 30024G33KT 5SM RA BR BKN012 BKN029 OVC040 24/22 A2966 RMK AO2
KILM 040116Z AUTO 30027G36KT 10SM -RA FEW011 BKN017 OVC033 24/22 A2960 RMK AO2
KILM 040053Z AUTO 31026G37KT 10SM -RA BKN011 BKN020 OVC042 24/23 A2957 RMK AO2
 
In 12 hours, the settings changed by 00.30 in a single location.  Like I mentioned earlier: having it remember what you'd set it at when you passed trans alt would be largely useless on a plane that covers such large distances.

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Thank you for the reply. I know about pre-setting after it is on standard before transitioning again, but was wondering whether it was normal to reset to default transition. It is a little annoyance when pre-setting on descent to always have to change it from 1013. In the 747 it remembers and stays on the last set number.

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In the 747 it remembers and stays on the last set number.

 

Pretty sure the real one doesn't do that, if you're referring to a previous offering.

 

 

 


but was wondering whether it was normal to reset to default transition.

 

It is.

 

Remember to sign your name to your posts, please.

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Press B before you change from STD and it will preselect the local altimeter. (and yes, this is in the manual...)

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