A-320 RNAV limitation
Thread Starter
Joined: Dec 2019
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From: Washington
A-320 RNAV limitation
Airbus has a limitation regarding RNAV approaches. It says this:
An RNAV(RNP) approach may be performed, with GPS PRIMARY not available, only if the radio navaid coverage supports the RNP value and HIGH accuracy is displayed on the MCDU with the specified RNP, and an operational approval is obtained
This sounds like I could do an RNAV(GPS) approach using say LNAV minimums without GPS PRIMARY. Is that what other Airbus drivers or former Airbus drivers understand that limitation to mean?
If so, then what RNAV system are we then using? Is it a DME/DME RNP-.3 system? In the US at least almost all RNAV approaches prohibit using that for RNAV approaches. Any input is appreciated.
Joined: May 2002
Posts: 327
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From: Kiwiland
Yes it does mean that, as IRS navigation with DME/DME updating is reliable enough for basic GPS approach. The HIGH ACCURACY annunciation is all thats required.
Just as you can carry out a VOR or NDB approach when the aid is inop.
Just as you can carry out a VOR or NDB approach when the aid is inop.
Joined: Jan 2014
Posts: 720
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From: N5109.2W10.5
This sounds like I could do an RNAV(GPS) approach using say LNAV minimums without GPS PRIMARY. Is that what other Airbus drivers or former Airbus drivers understand that limitation to mean?
See: https://www.icao.int/MID/Documents/2...20-%20ICAO.pdf for clarification.
