| ▲ | stevarino a day ago | |
A bit more complicated, as the aircraft itself was unable to detect the stall conditions due to icing of the pitot tubes so the warning itself was in and out several times. Clearly the copilots did not understand the situation so an inconsistent alarm could be seen as spurious or a secondary effect. > At the same time he made an abrupt nose-up input on the side-stick, an action that was unnecessary and excessive under the circumstances. The aircraft's stall warning sounded briefly twice due to the angle of attack tolerance being exceeded ... > The crew's lack of response to the stall warning, whether due to a failure to identify the aural warning, to the transience of the stall warnings that could have been considered spurious, to the absence of any visual information that could confirm that the aircraft was approaching stall after losing the characteristic speeds, to confusing stall-related buffet for overspeed-related buffet, to the indications by the flight director that might have confirmed the crew's mistaken view of their actions, or to difficulty in identifying and understanding the implications of the switch to alternate law, which does not protect the angle of attack. Its a complicated interplay of systems, where autonomous control systems are changing modes and receiving bad information during a complex, raplidly developing situation. | ||
| ▲ | ApolloFortyNine 11 hours ago | parent [-] | |
>A bit more complicated, as the aircraft itself was unable to detect the stall conditions due to icing of the pitot tubes so the warning itself was in and out several times. 74 times the stall warning blared [1] Of the 3 pilots in the cockpit, only one thought he had to pull up, see page 31, unfortunately he was one of the ones in control. >raplidly developing situation. It was the same situation from when it began to the end, stuck pitot tubes. Though the stall warning only started blaring when the pilot stalled the plane. Bad airspeed indicators don't stall the plane, and are something pilots are supposed to be able to handle, that's why 2 of the 3 were shocked one did the exact opposite in the situation. It was pilot error. Just look at the report, every finding starts with "the Crew". Planes aren't supposed to crash into the ground just because an air speed sensor failed. [1] https://bea.aero/uploads/tx_elyextendttnews/annexe.01.en.pdf | ||