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rsvit

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Posts posted by rsvit


  1. On 9/16/2023 at 3:20 AM, toby23 said:

    Which of the following statements is correct?

    1. Enter the ISA DEV/QNH at the Destination Airport
    2. Enter the ISA DEV at TOC and the QNH of the Destination Airport?
    3. Enter the ISA DEV at TOD and the QNH of the Destination Airport?


    SimBrief shows me the AVE ISA for the trip as well as deviations (TDV) at TOC and TOD but NOT at the destination airport.

    4. Can I enter either in Hg or hPa for the QNH? 

    You need to enter average ISA over descent. You can get airport one by calculating from METAR. 
     

    Either inHg or hPa is accepted.


  2. So you say it makes a turn with autopilot already off?

    By most SOP you must turn autopilot off not sooner than MDA minus 50'. Especially it's important for backcourse approach, when you have to overfly localizer, at this point signal is lost, because LOC doesn't beam upwards (maybe there is some protection in real autopilot, which willl force the plane to keep wings level). "Just before the touchdown" AP disengagement will be right in this zone, so fly manually earlier. IIRC NGX is disengaging autopilot automatically at 100RA for IAN approch, which is also too late.

    Have flown BC approach many times, the only problem I don't have FD's. Ryan said they fixed the bug in 2012, hopefully we'll get the update someday. 

    • Upvote 2

  3. Thanks I will try that. But it seems a bit odd to me that the F/O's F/D disappeares on approach just because the other one is master or because AP A is engaged. Can't believe this is the case in reality.

    Both master F/D and autopilot must be choosen for PF's side. Because when you select autopilot it sets the FD on a corresponding side as a master. So if flying as FO - you use FD B and AP B.

    Two FCCs are calculating flight path differently using their own sensors and flight computers, thus their data might mismatch sometimes. And you don't want captain and FO FDs to show different things, so master-slave logic is used, where slave just "copies" the master FD guidance. However, on approach, probably due to safety reasons, slave FD requires its own nav radio to be set for ILS frequency, otherwise it will not show GS. That is because on automatic approach both FDs become masters and the GS data is compared between them and only if tolerances on and between both the FDs are met, autoland would be available.

    • Upvote 1

  4. You had GREEN single channel indication. This means autopilot uses FMC to build the glidepath. And it's followed accordingly to barometric altimeter and it seems you haven't the pressure it correctly. That is why you have the miss of 100'. And the same for course: you can see that you have FAC instead of LOC, it just uses coordinates to guide you.

     

    This was caused because you were tuned to VOR, located 130nm away, no chance it could get the glideslope.

     

    I see lots of mistakes and highly recommend you to fly the tutorial.

    Though 777 and 737 have some differences - 777 can auto tune and automatically couples the autopilots, when 737 have integrated approach navigation (ILS-like non-presicion approach) - you should be familiar with FMA indications, however you didn't pay attention to them same as many other many procedures which are similar to both aircrafts.

     

    According to the problem of misalignment - couldn't answer because haven't seen you flying ILS. But I think you were always doing IAN and, as it have navigation performance same as FMC (like 0.05nm) it could get you side of the runway.


  5. Sam is misleaded here.

     

    Yellow means that ILS beam has been captured and green one means that integrated approach navigation is used.

     

    IAN means that final approach course and glide path (both of them are calculated by FMC according to the RWXX and previous waypoint crossing altitude and position data which are shown on displays as an ILS interface) or just glide path. In this case autopilot will disconnect at 100'.

     

    IAN is an operator option.


  6. There is a wind aloft section in AS fligth plan tab. You can get winds data for ten different FLs from surface to 490. Choose altitudes which cover your descend path best. So that every point of major wind change, you'll have data entered. Don't enter too close to your cruise FL as FMC uses it automatically.

     

    3. Actually you can enter winds on FMC RTE DATA page. But if there are too much waypoints it's better to enter average wind to PERF INIT. This will allow more accurate calculations. Be sure to deselect "show surface winds" for more accurate data. Maybe in SP2 we'll have winds data export as on 777X.


  7. I don't navigraph charts, but I guess MAP RW08R is an approximate missed approach point.

     

    And missed approach procedure can be performed above 2000' in 1nm after runway threshold.

     

    Anyway charts are needed to clarify this.

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