RNP Approaches - Airbus

[A-3TWENTY]

Going to the SIM without previous trainning, what are the actions to take in case of the following failures?

1.Navigation Accuracy Degrade

2.FMS/GPS Position Disagree

3.FMS1 / FMS2 Position difference

4.FMS /IR Position Disagree

[ACMS]

Too detailed to put in here.

All that info is in our QRH.

Or if it's not in yours look in the FCOM.

You come in to Pprune for this info?

[Capn Bloggs]

1. Discontinue Approach
2. Discontinue Approach
3. Discontinue Approach
4. Discontinue Approach

Warning/Caution/Note: I don't fly Airbii.

[Airmann]

It actually depends what you mean by RNP. If its RNP AR or RNAV (RNP). Big difference.

Any position disagree is always a go around because you cannot be sure what is right and what is wrong, you need to go around and sort that out.

For any sort of downgrade you can continue in some circumstances in others you have to go around, depends on the type of Approach, whether you are on final (below 100ft.), company SOPs etc.

[FE Hoppy]

I would imagine that you will receive the training required in the sim. If not have a word with your training department!

[aterpster]

RNP or RNP AR? Big difference.

[MD83FO]

he didn't say RNP AR, how can i post a diagram here.

[aterpster]

MD83FO:

he didn't say RNP AR, how can i post a diagram here.

Any graphics must be posted somewhere else then linked to this site in your message.

[vilas]

A-3Twenty
PRO-NOR-SOP-18-C P9/20
MANAGEMENT OF DEGRADED NAVIGATION


The approach may be continued in case of single failure of:


‐ GPS (MMR)


‐ FMGS


‐ EFIS DU


‐ MCDU


‐ AP


Discontinue the approach in the following cases:


‐ FINAL APP does not engage


‐ GPS PRIMARY LOST on both NDs
‐ Dual NAV ACCUR DOWNGRAD


‐ FM/GPS POSITION DISAGREE


‐ FMS1/FMS2 POS DIFF


‐ Dual loss of FMGC or dual loss of FINAL APP mode


‐ Dual AP failure if the RNP < 0.3 nm


‐ Loss of GPWS TERRAIN if obstacles or TERRAIN inconsistencies


‐ NAV ALT DISCREPANCY