PPRuNe Forums - View Single Post - AA A321 takes off after smashing ground sign
Old 18th Jun 2022, 14:16
  #132 (permalink)  
waito
 
Join Date: Aug 2020
Location: Far East
Posts: 233
Received 41 Likes on 30 Posts
Also took a look at the high res FDR plot

20:40:34 EDT shows WoW Sensor Main Right going to AIR. I will group some FDR evens around that timestamp. Values are read with sort of inaccuracy.

Rwy Mag HDG is 314°

-9 ... -4s:
Rudder between -0 and -10° (left), in sync with pedals

-4s ... -3s:
Rudder starts to exceed -10° (left)
Now HDG soon follows Rudder to left

-3 ..
Left Sidestick moved right 16° and pulled back 20°
Rudder quickly to -16° (left), then only gradually reduced
HDG changes up to 309°

-2s ...
Left Sidestick briefly moved to left -5° then right again 20°
Rudder only relieved to -13°
WoW Nose = Air
Roll (Bank) left up to -4°
HDG changes up to 301°

-1s ...
Right Sidestick had moved Right 20°
Rudder slowly reduced to -10° then runs right to 8° (note the pedal-to-rudder offset)
At time of WoW R Main = Air: Bank is -14° (left)

0s ...
Right Sidestick briefly released to <10° then again Right 20°
Left Sidestick briefly pushed to -3° then pulled again close to 20°
Right Sidestick follows the pull
HDG peaks at 290°
Bank develops to -36°
Rudder develops up to 20° right

+1s ...
Bank max at ~37°

+1.5s: WoW L Main = Air
then Rudder towards neutral
Both Sidesticks Lateral (Bank) towards neutral

+2s ...
Right Sidestick now is completly relased and not used anymore
Left Sidestick goes right then full left again
and is then reduced Longitudinal (Pitch) towards 0°
Rudder around neutral, then start to turn left again
bank reduces from -30 to -7°

+3s ...
Rudder at -20° (left) again
Bank around 0°
HDG 300°
Then Left Sidestick Lat (bank) back to 0°

+4s ...
Rudder back to neutral, then 2s right 10° then neutral for the remainder
Bank changes left to 16°
Left Sidestick moves right to 20°

+5s ...
Bank peaks at -20°
Now Left Sidestick is releived towards lat (bank) 4...0°
HDG ~288°

waito
waito is offline