Sign in to follow this  

FSL Airbus blinking Localizer Deviation Scale

Recommended Posts


Does anyone know the significance of a blinking localizer deviation scale?

During a LIFR approach the Localizer was centered, but blinking. I didn't have any errors on the ECAS. It was very low visibility so I couldn't tell if I was actually following the localizer. Went around and bailed out. 

Sorry to ask such questions here, but this is where I feel at home.

Also, is there access to Airbus FCOM volumes somewhere on the web? I'd be happy (sorta) to find the answer myself. 

After an additional search of Google I found this:

Localizer and Glide Slope Deviation scales

These scales will appear when the ILS/LS pb on the EFIS control panel is selected. The deviation symbols (diamond shapes) appear when a valid signal is received.

  • When the localizer or glideslope is deflected full scale, half of the deviation symbol appears at the end of the scale in the direction of the localizer or glide slope.
  • The localizer scale will flash continuously if deviation exceeds 1/4 dot for two seconds above 15 feet RA.
  • The glide slope scale will flash continuously if the deviation exceeds one dot for two seconds above 100 feet RA.
  • The localizer and glide slope half indices flash continually when the deviation exceeds two dots for two seconds.
  • One dot represents a deviation of ± 0.8° on the localizer scale and ± 0.4° on the glide slope scale.

Feel free to delete, mod, if this is too silly.

Edited by RichieFly

Share this post

Link to post
Help AVSIM continue to serve you!
Please donate today!

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
Sign in to follow this