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ILS Approach Too High, DMR VOR Approach TNCM

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Apologies for the two pronged question but I have struggeld the entire weekend.1. One of my local airports, FALA (Lanseria International Airport) I just cannot seem to do an ILS Landing with the ngx. I do ILS landings all over the place perfectly, ie. other SA airports or US airports, but everytime I do ILS to FALA the aircraft is on the glideslope and descends and then about 1 mile from threshold (maybe closer) the aircraft just goes on in level flight above the runway? any ideas?2. Could someone please help me with the correct approach steps for runway 10, TNCM. Again the same issue, at DME 2 miles the aircraft just does not descend to the threshold.Thanks,Eddie Taute

Hi Eddie,A DME/VOR approach isn't a ILS approach and the plane can't do an autoland, so you have to land manually like in TNCM.Many default airports in FSX have wrong ILS approaches which doesn't align with the runway. Maybe you install a custom scenery/afcad for FALA.Best regards,Jonathan

John Rubens
PMDG_ngx_T7_sig.jpg

  • Author

Jonathan,Thanks, I have custom scenery from Aeroworx installed for FALA?Also, the DME VOR approach, I am aware that it is not an ILS approach and that I cannot land automatically, I am looking for a guide to learn how to do it? Supposedly VNAV takes you on the glideslope, 2.98 degrees to close to threshhold but it doesn't happen for me.Regards,Eddie

Any link for the charts?Bert Van Bulck

  • Author

ILS approach for FALA attached.Cheers,Eddie

  • Commercial Member

1. Are you positive you're in the ILS modes and not the IAN ones? Look at the FMA - does it say | VOR LOC | G/S or does it say | FAC | G/P or | VOR LOC | G/P. If it's either the second or third ones, you're not doing an ILS, you're using an FMC generated glideslope and the plane will level at the MDA since those modes are used for an non-precision approach.Make sure there's really an ILS at that location in the FSX scenery data - the IAN modes will engage when you press APP if there's no valid ILS signal tuned.2. You're not understanding the difference between precision and non-precision approaches. Only a precision approach (for all intents and purposes just ILSes in FSX) are going to take you right down to the runway. Even in real life, only very specific types of ILSes at certain airports are certified for autolands. The vast majority of real life landings are done manually. A Cat I ILS will take you down to 200 feet above the runway, a Cat II 100 feet, and only a Cat III has no minimums. In all cases except for Cat III you disconnect at the decision height and land manually or if you can't see the runway lights you go around.A non-precision approach (which is what the various TNCM Runway 10 approaches are) takes you down to a much higher "Minimum Descent Altitude" based on following a VOR radial in this case and not descending below intermediate minimum altitudes at various DME readings from the VOR along the way down. So it's place/bearing/distance stuff - on the VOR Z 10 approach there, you basically have two fixes - ULUBA, which is at 10 DME on the PJM 264 radial, and DEBIR, which is at 4.9 DME on the same radial. The chart says you cannot descend below 1600 feet until you're past DEBIR. At that point you begin a descent toward the hard MDA of either 700 or 500 feet (this depends on the runway visual range and which category of aircraft you're flying - the NGX can be either a Category C or D airplane depending on the variant and weight you're using). If you don't see the runway at the MDA, you go around. If you do see it, disconnect the autopilot and land manually. There is no such thing as an autoland on any type of approach other than an ILS in the NGX.

Ryan Maziarz
devteam.jpg

For fastest support, please submit a ticket at http://support.precisionmanuals.com

  • Author

Ryan,Thank you for the detailed explanation, I will have a look when I get home tonight and report back.Regards,Eddie

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