Mrmartinnico
21st May 2021, 16:17
Can anyone help me out here?
I have been wondering about this "Runway update" callout. There's tons of videos of cockpit-recorded takeoffs (From Aer Lingus specifically), where they apply takeoff power, read the corresponding FMA Lines, and then say "runway update".
According to current FCOM revisions, this is not a standardized procedure callout, (may be an airline operation manual one though). So this led me to dig into some manuals a bit more.
Further reading into the FMGS Systems, I soon realized the FM Position Update on takeoff (which is a thing) is inhibited during GPS Primary operations, or as we all know, basically during every normal modern Airbus aircraft operation. So, even if the crew was operating under NON GPS Primary conditions, such as Radio positioning update of the FMS, there is not indication on any display units AT ALL of this Update! As far as I'm concerned, the FMS updates its position automatically upon application of TO power, but no pilot indications are given. Does anyone know what they're looking when they say it?
Furthermore, does anyone really know why they say it at all?
Thanks in advance!
I have been wondering about this "Runway update" callout. There's tons of videos of cockpit-recorded takeoffs (From Aer Lingus specifically), where they apply takeoff power, read the corresponding FMA Lines, and then say "runway update".
According to current FCOM revisions, this is not a standardized procedure callout, (may be an airline operation manual one though). So this led me to dig into some manuals a bit more.
Further reading into the FMGS Systems, I soon realized the FM Position Update on takeoff (which is a thing) is inhibited during GPS Primary operations, or as we all know, basically during every normal modern Airbus aircraft operation. So, even if the crew was operating under NON GPS Primary conditions, such as Radio positioning update of the FMS, there is not indication on any display units AT ALL of this Update! As far as I'm concerned, the FMS updates its position automatically upon application of TO power, but no pilot indications are given. Does anyone know what they're looking when they say it?
Furthermore, does anyone really know why they say it at all?
Thanks in advance!