This works for me on LHF using SimBrief Routing, CI, CRZ ALT_STEPS, PAX, ZFW etc., I've never deleted a waypoint/restriction (NAVAID) to solve this issue.the idea being that ATC wouldn't allow it.it's up to my company/dispatch to solve the issue.in theory at least. On the rare occasion this does not work (on the ground) I may have to Load/Unload fuel or PAX.
![fsx pmdg 777 err runway fsx pmdg 777 err runway](http://cdn.flyaoamedia.com/wp-content/uploads/2013/08/pmdg-777-SFO-6.jpg)
When corrected the PROG page will usually show +5.0KG at the ARRIVAL airport. So, I manipulate the CI and/or initial CRZ ALT on the PREF page until I do not receive the message(s) UNABLE NEXT ALT or UNABLE CRZ ALT (regardless of predicted arrival fuel). I find that if the combination of Cost Index, CRZ ALT and ZFW do not equate to at least 5.0KG of calculated fuel left onboard (at my Arrival DEST) then I may see UNABLE NEXT ALT or UNABLE CRZ ALT.the VNAV may or may not populate SPD and/or ALT etc. Hi restrictions are annoying.on the ground I always check the PROG page. But in a nutshell sometimes you have to play around with the MCP to get what you want, otherwise hand fly it until you get on the right route then engage A/P. If it switches to vnav pth at TOC then its working fine and the fms is now satisfied with your input at this stage and can take it from here. If that happens again, try going back to the Dep/Arr page and reselect your departure route. When it reached the TD, it indicated VNAV PTH. While it was climbing it indicated SPD CLMB on the display. I let it go at that because it seemed to manage to climb to that level, even though really loaded with fuel luggage and passengers. Instead it went straight to the last step I had set the on the MCP, F元60. The next problem, the autopilot did not obey the first step of cruise altitude, F元20, in the FMC. After the aircraft got past COOPP, I clicked VNAV and it started climbing. I did try clicking the center of the altitude knob on the MCP but that had no effect. before and after the vector change to line towards KLIPR, I could not get it to climb above that with VNAV, when I changed it to 5000. When I reentered the F元20 in PERF INIT, the FMC replaced the wrongly deleted waypoint with a level of 280ft, which was just above quite a few obstacles.
![fsx pmdg 777 err runway fsx pmdg 777 err runway](http://dxhb0it26is40.cloudfront.net/productimages/fs2crew-pmdg-777-captains-set_6_ss_m_150116144303.jpg)
I had wrongly deleted the first waypoint after the runway. I deleted that and did not get unable next alt message. It only had one waypoint to delete in the SID part of the route, with A above sign. I tried again asimilar route from KLAX to LFBO: KLAX 25R ORCKA1 LAS J146 DVC HBU J146 GIJ J554 JHW Q82 PONCT TUSKY N87A SUPRY 46N050W 46N040W 46N030W 45N020W KOPAS STG SUSOS UN725 DGO UN976 PPN UN976 LATEK LATE6T LFBO 32L So go to the legs page after selecting departure runway and SID and delete the first 2 alt constrain for the fmc to compute its own when you enter perf info. By looking at the ORCKA1 charts there is a set of altitude constrains that follows some conditional altitude orders that the current VNAV implementation on this aircraft will not handle properly. UNABLE NEXT ALT means there is a constrain on the SID that the FMC is predicting will not comply. The FMC will predict automatically when to step climb (FLXXX S) on the legs page, you can modify that if required. So enter F元10 or F元30 (as simbrief suggest for your initial cruise level) on the PERF init page. This aircraft/fmc simulation can handle step climbs enroute. Please see the detailed route flight plan simbrief provides, it will tell initial FL (most likely F元10 or F元30 given your weight), then the flight plan will tell when the step climb to F元50 is expected mid flight.
![fsx pmdg 777 err runway fsx pmdg 777 err runway](http://www.allflightmods.com/wp-content/uploads/2017/02/FS2004FSX-China-Southern-Boeing-777-200-2.jpg)
If you enter F元50 to the FMC it will say UNABLE CRZ ALTITUDE, the aircraft is simply too heavy to climb such altitude after departure. What happens here and on real life, you go to a lower FL, you burn enough fuel for hours until the aircraft comes lighter enough to handle final cruise altitude F元50. It doesn't mean you go straight up from the runway to F元50. This is just fine, this is how this aircraft is flown on the real life and were this aircraft comes efficient. You did not share your figures but this is going to be a -pretty heavy- bird for takeoff and climb out.
#FSX PMDG 777 ERR RUNWAY PLUS#
You will require around 90 tons of fuel, plus passengers, plus cargo. Ok you are tying to make a 5200 NM trip here, that is about 10-11 hs flight time.