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Old 05-19-2022 | 09:38 AM
  #21  
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Originally Posted by Punkah Louvre
is mishandling the jet on final the underlying issue? I’m not sure it is. I miss a few memos but I’ve not seen your mitigation technique documented. There’s a safety first article that covers ts mitigation; and I’m sure WIN has lots of detail.
i think management has to take a long hard look at the data with an open mind as to causality. I’d expect some themes to emerge, but it’s probably more complex than just limited experience.
//PL
Looks like side stick input in pitch was limited in flare mode. That fix is only active with ground spoiler extension. If you hit the tail I would say you mishandled the jet at some point on short final. Not necessarily after the gear is already on the ground with spoiler extension. To be clear we’re talking in generalities and not about any of our current crews or strikes. On short final what I’ve noticed is to slow (function of auto thrust lag) with a highish deck angle resulting in the bottom falling out if you lose the gust and a pitch up reaction to that. Adding speed to vapp is the best mitigation in those scenarios imo. I’ve seen speed just sit 5-6kts below vapp for several seconds with no auto thrust increase.

Last edited by fcoolaiddrinker; 05-19-2022 at 09:54 AM.
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Old 05-19-2022 | 11:43 AM
  #22  
Almost there
 
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Originally Posted by Punkah Louvre
I certainly agree that our increased hiring will increase the likelihood of ‘training incidents’ -perhaps management should recognize the experience of current employees and make more effort in retaining its pilots; and spend less on hiring new ones with the event risks…
I can only hope. The fight the Alaskan pilots are having to put up despite their problem is making me a bit more nervous about our future fight. Hold the line!
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Old 05-21-2022 | 02:17 PM
  #23  
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Originally Posted by fcoolaiddrinker
On short final what I’ve noticed is to slow (function of auto thrust lag) with a highish deck angle resulting in the bottom falling out if you lose the gust and a pitch up reaction to that. Adding speed to vapp is the best mitigation in those scenarios imo. I’ve seen speed just sit 5-6kts below vapp for several seconds with no auto thrust increase.
^^^^This is spot on.
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Old 05-21-2022 | 06:09 PM
  #24  
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Originally Posted by wt93205
^^^^This is spot on.
This would happen on all 320's right? Why is Frontier's rate 40x higher?
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Old 05-21-2022 | 09:06 PM
  #25  
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From: 1900D CA
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Originally Posted by wt93205
^^^^This is spot on.
I agree.

Seems to me the autothrust is a little slower to spool up on the NEOs too. I hate that feeling of getting slow and running out of energy
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Old 05-22-2022 | 06:19 PM
  #26  
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Originally Posted by Airrick2003
This would happen on all 320's right? Why is Frontier's rate 40x higher?
if it is and can be proven that is really bad and an accident waiting to happen…
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Old 05-23-2022 | 12:05 AM
  #27  
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Originally Posted by fcoolaiddrinker
Looks like side stick input in pitch was limited in flare mode. That fix is only active with ground spoiler extension. If you hit the tail I would say you mishandled the jet at some point on short final. Not necessarily after the gear is already on the ground with spoiler extension. To be clear we’re talking in generalities and not about any of our current crews or strikes. On short final what I’ve noticed is to slow (function of auto thrust lag) with a highish deck angle resulting in the bottom falling out if you lose the gust and a pitch up reaction to that. Adding speed to vapp is the best mitigation in those scenarios imo. I’ve seen speed just sit 5-6kts below vapp for several seconds with no auto thrust increase.
Do you add that speed going into LGA or DCA with a wet or cantaminated runway? Do you have a method to quickly get new numbers for the increased speed?
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Old 05-23-2022 | 04:54 AM
  #28  
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From: 1900D CA
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Originally Posted by sailingfun
Do you add that speed going into LGA or DCA with a wet or cantaminated runway? Do you have a method to quickly get new numbers for the increased speed?
We can get landing data in less than a minute thru the acars
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Old 05-23-2022 | 08:02 AM
  #29  
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Originally Posted by sailingfun
Do you add that speed going into LGA or DCA with a wet or cantaminated runway? Do you have a method to quickly get new numbers for the increased speed?

320 or 321? much do we weigh? what are the winds? What’s the contamination? Wet/frozen? Based on all that and then some other factors I’m sure I didn’t mention we’ll make a decision. I might go option b and turn off auto thrust? There’s guidance for both options including adding up to 15 kts to vapp. What I’m fairly confident I won’t do is niether if there’s wind shear. Ways to get landing distance. ACARS, qrh, and I believe vol 2 still.
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Old 05-23-2022 | 08:51 AM
  #30  
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Originally Posted by fcoolaiddrinker
it seems that will more than likely be true if f9 doesn’t address the underlying issue. Tail strike mitigation techniques. Adding 3-5 knots to vapp in a 321 as well as neo. That or turning auto thrust off because this auto thrust system struggles to increase power at or near vapp on short final. Swa 73 you can’t even use auto thrust in wind shear. I almost never see either technique used.
We can’t even land with AT on. AP off AT off on landing. Not restricted on TO.
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