My quick maths is very very bad. The vertical deviation should be 150ft (info below). Also I forgot to mention RNP (AR) approaches use VNAV/LNAV for your guidance. Do not press APP on the MCP this activates IAN (Integrated Approach Navigation) mode which can only be used on straight in RNP approaches as they can't handle the curved RF legs until we get the new FMC database update COMING SOON 😁
CASA's - ADVISORY CIRCULAR. AC 91-05v1.0 / Performance-Based Navigation: 3.9 - RNP AR APCH / Flight crew procedures - 3.9.3 *3.9.3.3 - Not with standing the above, the limiting value for vertical deviation should not exceed: a. 75 ft below the defined vertical flight path b. 75 ft above the defined vertical path unless a figure greater than 75 ft is determined as appropriate for the aircraft type after considering the following: i. aircraft flight characteristics ii. the effect that any deviation may have on the safe continuation of a stabilised approach iii. airspeed iv. energy management v. aircraft height above ground level vi. autopilot vertical gain performance.
I cant thankyou enough for this comment, i have been having troubles with this value since i restored my corrupted panel state and it seems my quick maths is very very terrible... 75 below + 75 above is 150 not 125 haha oh my god. But using any value you seem neccesary in the pmdg would be appropriate considering it cant fly the rnp rf curved legs properly until the new update. i have been using 200ft vertical deviation to keep it within the limits on multiple rf curved legs as defined in (b.) below. I got my information from.... CASA's - ADVISORY CIRCULAR. AC 91-05v1.0 / Performance-Based Navigation: 3.9 - RNP AR APCH / Flight crew procedures - 3.9.3 *3.9.3.3 - Not with standing the above, the limiting value for vertical deviation should not exceed: a. 75 ft below the defined vertical flight path b. 75 ft above the defined vertical path unless a figure greater than 75 ft is determined as appropriate for the aircraft type after considering the following: i. aircraft flight characteristics ii. the effect that any deviation may have on the safe continuation of a stabilised approach iii. airspeed iv. energy management v. aircraft height above ground level vi. autopilot vertical gain performance.
That is the vertical deviation limit and all RNP (AR) approaches are this value, since they are 3d approaches. If the pink arrow goes outside of the white bars, which is the vertical deviation of 150ft you will have to go around. On the lateral deviation of 0.30 which is nautical miles you can have the rnp value exceeded by the rnp value itself. You can verify this with the x-track error on progress page2 (it will tell you how many 0.0nm you are off your path) setup on first officer's side
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My quick maths is very very bad. The vertical deviation should be 150ft (info below). Also I forgot to mention RNP (AR) approaches use VNAV/LNAV for your guidance. Do not press APP on the MCP this activates IAN (Integrated Approach Navigation) mode which can only be used on straight in RNP approaches as they can't handle the curved RF legs until we get the new FMC database update COMING SOON 😁
CASA's - ADVISORY CIRCULAR. AC 91-05v1.0 / Performance-Based Navigation: 3.9 - RNP AR APCH / Flight crew procedures - 3.9.3
*3.9.3.3 - Not with standing the above, the limiting value for vertical deviation should not exceed:
a. 75 ft below the defined vertical flight path
b. 75 ft above the defined vertical path unless a figure greater than 75 ft is determined
as appropriate for the aircraft type after considering the following:
i. aircraft flight characteristics
ii. the effect that any deviation may have on the safe continuation of a stabilised
approach
iii. airspeed
iv. energy management
v. aircraft height above ground level
vi. autopilot vertical gain performance.
Good stuff mate ! YBBN from ORBX is highly recommended :) Awesome you fly to my hometown...I'm going to try the same as in this tutorial
Cheers mate 🧑✈ This is one of my fav approaches. Let me know how your approach goes🤙
1:16 you said 125 for Vertical. What does that mean and where did you get that figure?
I cant thankyou enough for this comment, i have been having troubles with this value since i restored my corrupted panel state and it seems my quick maths is very very terrible... 75 below + 75 above is 150 not 125 haha oh my god. But using any value you seem neccesary in the pmdg would be appropriate considering it cant fly the rnp rf curved legs properly until the new update. i have been using 200ft vertical deviation to keep it within the limits on multiple rf curved legs as defined in (b.) below. I got my information from.... CASA's - ADVISORY CIRCULAR. AC 91-05v1.0 / Performance-Based Navigation: 3.9 - RNP AR APCH / Flight crew procedures - 3.9.3
*3.9.3.3 - Not with standing the above, the limiting value for vertical deviation should not exceed:
a. 75 ft below the defined vertical flight path
b. 75 ft above the defined vertical path unless a figure greater than 75 ft is determined
as appropriate for the aircraft type after considering the following:
i. aircraft flight characteristics
ii. the effect that any deviation may have on the safe continuation of a stabilised
approach
iii. airspeed
iv. energy management
v. aircraft height above ground level
vi. autopilot vertical gain performance.
That is the vertical deviation limit and all RNP (AR) approaches are this value, since they are 3d approaches. If the pink arrow goes outside of the white bars, which is the vertical deviation of 150ft you will have to go around. On the lateral deviation of 0.30 which is nautical miles you can have the rnp value exceeded by the rnp value itself. You can verify this with the x-track error on progress page2 (it will tell you how many 0.0nm you are off your path) setup on first officer's side