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Old 10th Feb 2023, 15:37
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HeathrowAirport
 
Join Date: Dec 2007
Location: London Under EGLL(LHR) 27R ILS
Age: 31
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I've got a picture I took from the 4th FDJ in the cruise at Sunset of the HUD. FWIW (Probably nothing)

I just read from another source, that when the Captain was playing with the FMS, the FO wasn't following the commands of the FD as he made an earlier turn of what would be the direction of travel. So the earlier reports or as per AvHerald of missing FD are incorrect. The aircraft I fly for IFR ventures don't have FD as we don't have a digital autopilot, so limited to flying without guidance - I suspect a huge somatogravic illusion happened to the FO who wasn't expecting incorrect FPV or FD indications? Not giving excuses to the FO, but do you get the transition of turbulence crossing the land to the cooler sea like you do at most place which makes looking at the HUD a bit more disor

P.s. I think it's standard Boeing Procedure to use the HUD in all phases of flight.



B789 HUD




Originally Posted by Commander Taco
The article is not well written but I’m not sure the flight directors were off.

the first officer attempted to turn towards that waypoint flying manually and without flight director indications (the captain was slow to put the Direct into the FMS) but lost situational awareness sending the”

I think it likely that the flight directors were on and as the captain was slow inputting the “direct to”, in the absence of a roll command the f/o began a turn. The whole thing is still hard to fathom. I mean, the fly-by-wire system automatically compensates for the higher wing-loading generated in a turn - there is no need to apply control column back pressure until 30° of bank is exceeded.
Originally Posted by WhyWhyWhy...
The HUD is predominantly used only for LV approach’s though, why would you use it on a night VMC departure?
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