Russian Emergency Landing
@VHOED191006, that is only partially correct.
The effect You describe occurs when You have lost both green and yellow systems and are down to the brake accumulator. In that case, You are indeed down to about 7 brake applications before pressure runs out. However, if the yellow hydraulic system is pressurised, alternate braking with antiskid is available with an unlimited number of applications.
Ref. OM-B DSC 32-30-10 Braking modes
Until now, there is nothing indicating anything beyond a plain Green sys failure on the flight in question as far as I am aware.
What was the weather like at Omsk at the time of approach and is there a word on the runway condition maybe?
The effect You describe occurs when You have lost both green and yellow systems and are down to the brake accumulator. In that case, You are indeed down to about 7 brake applications before pressure runs out. However, if the yellow hydraulic system is pressurised, alternate braking with antiskid is available with an unlimited number of applications.
Ref. OM-B DSC 32-30-10 Braking modes
Until now, there is nothing indicating anything beyond a plain Green sys failure on the flight in question as far as I am aware.
What was the weather like at Omsk at the time of approach and is there a word on the runway condition maybe?
@VHOED191006, that is only partially correct.
The effect You describe occurs when You have lost both green and yellow systems and are down to the brake accumulator. In that case, You are indeed down to about 7 brake applications before pressure runs out.
However, if the yellow hydraulic system is pressurised, alternate braking with antiskid is available with an unlimited number of applications.
Ref. OM-B DSC 32-30-10 Braking modes
The effect You describe occurs when You have lost both green and yellow systems and are down to the brake accumulator. In that case, You are indeed down to about 7 brake applications before pressure runs out.
However, if the yellow hydraulic system is pressurised, alternate braking with antiskid is available with an unlimited number of applications.
Ref. OM-B DSC 32-30-10 Braking modes
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There are three independent hydraulic systems on the A320 and even if for some reason the two primary ones fail, the aircraft is still controllable with the back up one though you’d have a lot of procedures to run through and would want to be landing at a decent airport.
A single failure wouldn’t be a major drama at all, you’d lose a few systems and have some ECAM work but a normal landing would be expected. Something obviously went seriously wrong to result in an off airport landing.
A single failure wouldn’t be a major drama at all, you’d lose a few systems and have some ECAM work but a normal landing would be expected. Something obviously went seriously wrong to result in an off airport landing.
Sometimes you have to pick sides. The world will know why.
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They pretty quickly started dismantling the A/C: https://x.com/andrewperpetua/status/...4cJ3snHPSDNP6w
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They pretty quickly started dismantling the A/C: https://x.com/andrewperpetua/status/...4cJ3snHPSDNP6w
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Sorry
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Any crew that runs a jet out of gas dealing with an emergency should be thrown in jail as incompetent. Landing with no gear at the original destination would have been better than making a forced landing in a field. Had the transit been over water the outcome would have been totally different. Even a brand new FO could tell you that the FMC fuel predictions are nonsense with the gear down.
Was it really a good idea to gravity drop the gear before deciding that going elsewhere to a longer runway was a better course of action? Leaving 2500m of runway behind you in favour of 3600m at Novosibirsk and then running out of gas only half way there is supremely incompetent.
Edit: Can't spell!
Was it really a good idea to gravity drop the gear before deciding that going elsewhere to a longer runway was a better course of action? Leaving 2500m of runway behind you in favour of 3600m at Novosibirsk and then running out of gas only half way there is supremely incompetent.
Edit: Can't spell!
Last edited by Magplug; 12th Sep 2023 at 17:12.
We are given to believe that it's the green system failed. That controls the normal braking system, leaving the aircraft on the alternate system (controlled by the yellow system). That's only limited to 1,000psi and around 7 applications of braking. That requires you to have a longer runway to land on. The gear is also controlled by the green system. Appears that it was stuck down with the loss of hydraulics. Looks like they really had no other choice!
Ural needs to ask Spindelberger to design a trailer for A320 gilders
The field looks long enough for a takeoff, but it looks like the cowls are assisting the MLG.
Braking action seems to have been pretty good, even with limited hydraulics. How long were the ruts?
The field looks long enough for a takeoff, but it looks like the cowls are assisting the MLG.
Braking action seems to have been pretty good, even with limited hydraulics. How long were the ruts?
Reminds me a bit of the 737-300 that landed on the dike outside New Orleans after losing both engines in a severe thunderstorm (which they did successfully fly out and returned to service).
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This will come into CRM studies presentations in a year or two. They've lost green hyd, decided to divert from normal weather 2500m runway with FFRS cat 8 or cat 9 service, hugely underestimated the fuel burn on low level gear out flight and ended up how they ended up. At least this time everyone is alive and well. Aircraft is not supported by Airbus, so assessment and repairs are questionable.
