Landing A320 on very wet runway
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Landing A320 on very wet runway
So the runway is very wet, and you want to plant the 320 firmly onto the runway to avoid hydroplanning.
What's your technique for planting the 320 firmly on runway? Flare less? Thrust to idle earlier?
What's your technique for planting the 320 firmly on runway? Flare less? Thrust to idle earlier?
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All landings should be the same, right place, right speed with a firm positive contact. It makes no difference whether it is wet or dry.
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All landings should be the same, right place, right speed with a firm positive contact.
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. then forward pressure on the stick.
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He might be referring to this article.
A normal touchdown that ensures ground spoilers deployment.
- Perform early and firm touchdown (early as runway behind you is no use, firm to ensure no delay in ground spoiler extension, brake physical onset, and reverse extension by sluggish wheel spin-up and/or delayed flight to ground transition of the gear squat switches)
- Decelerate as much as you can as soon as you can: aerodynamic drag and reverse thrust are most effective at high speed, then moderate braking only at low taxi speed after a safe stop on the runway is assured
- Do not delay lowering the nose wheel onto the runway (it increases weight on braked wheels and may activate aircraft systems, such as auto-brake)
Thanks sonic. Coincidentally I’d actually read that today re the latest FCOM change to wet ice.
Yes the ground spoiler extension triggers the auto brake cycle - just the above post seemed to imply an alpha that would trigger it. The article is ambiguously worded. I don’t remember that in the GS logic diagram but I don’t know everything and always curious...
Yes the ground spoiler extension triggers the auto brake cycle - just the above post seemed to imply an alpha that would trigger it. The article is ambiguously worded. I don’t remember that in the GS logic diagram but I don’t know everything and always curious...
REV IDLE is the norm in our outfit, so much so that many F/O’s have NEVER used REV MAX. If nose down sidestick isn’t held after selection of REV MAX, the nose will rear upwards like an angry horse!
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The 2.5 degree condition applies when "Speed brake lever in the retracted position but ground spoilers not armed and:"
"Ground Spoiler Control..
FULL EXTENSION - LANDING PHASEThe ground spoilers will automatically extend when the following conditions are met:
- Speed brake lever not in the retracted position or ground spoilers armed and:
- Both main landing gears on ground,
- Both thrust levers at or below Idle position, or Reverse selected on at least one engine (and the other thrust lever below MCT position).
- Speed brake lever in the retracted position but ground spoilers not armed and:
- Both main landing gears on ground,
- Reverse selected on at least one engine (and the other thrust lever below MCTposition).
- The ground spoilers are fully extended
- Flaps are not in clean CONF
- Pitch attitude is lower than 2.5 °
- Flying manually
- In normal law only."
Will it? Where I work we use rev max for every landing and I’ve never been conscious of the nose rearing up but I might be applying nose down without thinking about it.
There may be confusion with some of the words in FCOM regarding Ground Spoiler logic.
The 2.5 degree condition applies when "Speed brake lever in the retracted position but ground spoilers not armed and:"
"Ground Spoiler Control..
FULL EXTENSION - LANDING PHASEThe ground spoilers will automatically extend when the following conditions are met:
The 2.5 degree condition applies when "Speed brake lever in the retracted position but ground spoilers not armed and:"
"Ground Spoiler Control..
FULL EXTENSION - LANDING PHASEThe ground spoilers will automatically extend when the following conditions are met:
- Speed brake lever not in the retracted position or ground spoilers armed and:
- Both main landing gears on ground,
- Both thrust levers at or below Idle position, or Reverse selected on at least one engine (and the other thrust lever below MCT position).
- Speed brake lever in the retracted position but ground spoilers not armed and:
- Both main landing gears on ground,
- Reverse selected on at least one engine (and the other thrust lever below MCTposition).
- The ground spoilers are fully extended
- Flaps are not in clean CONF
- Pitch attitude is lower than 2.5 °
- Flying manually
- In normal law only."
Our 320 TP asked the rest of us what the spoiler logic was on our aircraft - as at that time at least one mainwheel on each side had to have spin up. Airbus had canvassed the airline TPs.
On the MD, which was “my” ship, any two main wheels - both one the same side - or one on each side - or more, would trigger the spoiler. I believe shortly after this, the same logic was employed on the 320.