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The fact that the pilot ignored the continuous audible "Stall! Stall! Stall!" alarm and kept the control stick pulled fully back (the opposite of what you want

by raldi 14y ago

The fact that the pilot ignored the continuous audible "Stall! Stall! Stall!" alarm and kept the control stick pulled fully back (the opposite of what you want to do in a stall) suggests to me that it's legitimate to place some of the blame on human error.

ZoFreX 14y ago
It's worth pointing out that the stall alarm goes off both when you go into a stall and when you come out of it, and you have to do very different things in those situations.
jt2190 14y ago
> The fact that the pilot ignored the continuous "Stall! Stall! Stall!" alarm > and kept the control stick pulled fully back The fact is that the black boxes recorded this behavior. Can we be 100% certain that the copilot actually did this? My concern is that we're still trusting the output of a system that has proven to be suspect.
- raldi 14y ago
  Other than the airspeed sensors freezing up, I'm not aware of any other known malfunctions. What makes you say the system was "proven to be suspect"?
  - jt2190 14y ago
    I'm quoting Wikipedia's summary of the Report: * The stall warning deactivates by design when the angle of attack measurements are considered invalid and this is the case when the airspeed drops below a certain limit. * In consequence, the stall warning stopped and came back on several times during the stall; in particular, it came on whenever the pilot pushed forward on the stick and then stopped when he pulled back; this may have confused the pilots. * Despite the fact that they were aware that altitude was declining rapidly, the pilots were unable to determine which instruments to trust: it may have appeared to them that all values were incoherent. Personally, I'm not sure whether to believe that the copilot simply made an amateur mistake .
- Coincoin 14y ago
  The copilot mentions he pulled the stick all along in the cockpit recording about 30 seconds before crashing. EDIT: When the pilot realized the error, he tried to correct, but it was already too late.

by raldi 14y ago

ZoFreX 14y ago

It's worth pointing out that the stall alarm goes off both when you go into a stall and when you come out of it, and you have to do very different things in those situations.

jt2190 14y ago

> The fact that the pilot ignored the continuous "Stall! Stall! Stall!" alarm > and kept the control stick pulled fully back The fact is that the black boxes recorded this behavior. Can we be 100% certain that the copilot actually did this? My concern is that we're still trusting the output of a system that has proven to be suspect.

raldi 14y ago
Other than the airspeed sensors freezing up, I'm not aware of any other known malfunctions. What makes you say the system was "proven to be suspect"?
- jt2190 14y ago
  I'm quoting Wikipedia's summary of the Report: * The stall warning deactivates by design when the angle of attack measurements are considered invalid and this is the case when the airspeed drops below a certain limit. * In consequence, the stall warning stopped and came back on several times during the stall; in particular, it came on whenever the pilot pushed forward on the stick and then stopped when he pulled back; this may have confused the pilots. * Despite the fact that they were aware that altitude was declining rapidly, the pilots were unable to determine which instruments to trust: it may have appeared to them that all values were incoherent. Personally, I'm not sure whether to believe that the copilot simply made an amateur mistake .
Coincoin 14y ago
The copilot mentions he pulled the stick all along in the cockpit recording about 30 seconds before crashing. EDIT: When the pilot realized the error, he tried to correct, but it was already too late.