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Thread: B777 A/P roll mode failure out of LNAV
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Old 29th Jan 2017, 03:12
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JammedStab
 
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Concerning IFSD......For our older 777's, the FCOM says "Heading information is not available in polar regions". For our newer models, they display true heading.

But my FCOM shows the polar region in the vicinity of 80W(when approaching from the west) as starting at 73N, not 72N as you experienced.
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