Incident: Jetstar A320 enroute on Mar 12th 2014, alpha floor activation
...the aircraft was climbing from FL360 to FL380, after the climb was completed the airspeed increased...
...Disconnecting the autopilot and autothrust led to a rapid increase in workload...(gulp!)
Ai miei tempi c'era una 'conditional procedure', o 'special operation': "Turbulence penetration"
- A/P: Attitude hold, oppure A/P: off; ATT: 3°
- A/T: Off (selezionare 85% N2)
- Non inseguire le variazioni di quota e non trimmare lo stabilizzatore.
...The aircraft climbed through FL373 when the first officer noticed the speed had increased to 0.81 mach and had engaged in a 3000 fpm climb... (avevano attivato i postbruciatori)
...the first officer reduced the thrust levers to idle, which effectively disconnected autothrust, in order to reduce speed, extended the speed brakes and disengaged the autopilot...
The aircraft however climbed above FL380.
The first officer...and pushed the nose down in order to re-acquire the assigned flight level. The aircraft began to descend and the airspeed dropped to below the lowest speed
Non credo che ci sia qualcuno che ignori che quando si tappa un pitot l'anemometro diventa come un altimetro: L'aereo sale: la velocità aumenta; L'aereo scende: la velocità diminuisce
The first officer applied nose up commands in order to level at FL380 and moved the thrust levers back close to but not to idle position, which reduced the maximum thrust available from the engines. The nose up inputs increased the angle of attack beyond the alpha floor, the alpha floor protection activated, the speed brakes were automatically retracted and the TOGA lock was activated.
http://www.google.it/url?sa=t&rct=j&...82001339,d.bGQ
e
http://www.google.it/url?sa=t&rct=j&...KOPbai62VtBRlg
Sarà la soluzione?