Problems with Bombardier CSeries Pro Line Fusion
Rockwell Collins Surface Management System (SMS)
16:00 (21:00 UTC) - November 21, 2017 - Quebec, Canada
by Sylvain Faust
- Runway Awareness and Advisory System (RAAS) – Rockwell Collins Surface Management System (SMS)
According to multiple sources, there's a problem with Bombardier CSeries Pro Line Fusion.
What is the RAAS?
Here's what Wikipedia is saying "The Runway Awareness and Advisory System (RAAS) is an electronic detection system that notifies aircraft flight crews on the ground of their position relative to their allocated runway."
To this, you add warning to the pilots during the landing phase of the aircraft. Warnings such as if the aircraft is lineup properly with the correct runway, if the runway length is to be sufficient for the actual landing…
Rockwell Collins' Pro Line Fusion® avionics is what equips the cockpit of each CSeries aircraft. Rockwell Collins has this feature as part of their Surface Management System (SMS) instead of RAAS.
Here's an extract from a company flyer:
Surface Management System
Provides automated checks and aural advisories to the flight crew, and adds a visual overlay that highlights the target runway on the airport chart display. Alerts include: takeoff or landing runway is too short; aircraft is initiating a takeoff or aligning to land on a surface that is not a runway; and takeoff runway disagrees with the departure runway designated in the flight management system.
Aural Alerts enhance runway safety
Condition: Takeoff not on a runway : "Not a runway, not a runway."
Condition: Landing runway too short : "Runway too short, runway too short."
Fusion supports runway safety awareness by displaying aircraft position during taxi. Should an unsafe takeoff or landing operation occur aural alerts "not a runway" and other annunciators provide additional situational awareness.
Confirmed with multiple sources, in many occasions CSeries pilots received "wrong" warnings. Ok, too many is better than not enough, but in this case it seems that some pilots elected to respect the warning provided by the system and aborted their landing (go around) when in fact the aircraft was properly lined up with the proper and assigned runway long enough to land on..
All the wrong warnings received were related to the landing phase.
Currently Bombardier is at work disabling this "Warning" message until a new version of the software fixing this issue is made available. I do not know if this involves re-certification of the navigation module/software functionality by Transport Canada, the FAA or EASA.
More on Rockwell Collins Pro Line Fusion in use with Bombardier CSeries aircraft https://www.rockwellcollins.com/Data/News/2016-Cal-Yr/CS/FY16CSNR44-CSeriesEIS.aspx