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View Full Version : Flying airway UL55 over high terrain of Alps


joshuahsong
20th Aug 2023, 15:04
Hi. I am from Korean LCC.
I am scheduled to fly our new B737-8 airplane from Toulouse, France to Seoul, Korea.
The planned route is to fly along the airway UL55 eastbound. (South France to North of Italy)
Having plotted the route on the chart, we just found we must fly over Alps area.
My company does not fly to European airspace so we do not have any published high terrain escape procedure for this area.
I hope to get some help from you guys based in Europe.
Do European companies have published high terrain escape procedures for this area? (For one engine drift down, and cabin depressurization)
Thank you!

sonicbum
20th Aug 2023, 15:13
Hi. I am from Korean LCC.
I am scheduled to fly our new B737-8 airplane from Toulouse, France to Seoul, Korea.
The planned route is to fly along the airway UL55 eastbound. (South France to North of Italy)
Having plotted the route on the chart, we just found we must fly over Alps area.
My company does not fly to European airspace so we do not have any published high terrain escape procedure for this area.
I hope to get some help from you guys based in Europe.
Do European companies have published high terrain escape procedures for this area? (For one engine drift down, and cabin depressurization)
Thank you!

Hi,

THAT (https://www.smartcockpit.com/docs/European_Alps_Depressurisation_Strategy.pdf) should help.

FullWings
20th Aug 2023, 18:03
With the Alps, wherever you are, youíre only about 10mins jet flying time from MORAs < 10,000í, 15mins worst case. Drift down is not really an issue, depressurisation needs a plan but itís pretty obvious from the charts what to do. The UL55 route has ~100nm above 10k, so youíre not going to run out of oxygen (especially with no pax) before you can fully descend, especially if you put a critical point 50nm in...