Hi,
IMHO it's sometingh wrong in the BEA communication ....
At 2 h 10 min 16, the PNF said
"so, we’ve lost the speeds" then "alternate law […]".
At 2 h 10 min 51 , the stall warning was triggered again. The thrust levers were positioned
in the TO/GA detent and the PF maintained nose-up inputs. The recorded angle of attack, of
around 6 degrees at the triggering of the stall warning, continued to increase. The trimmable
horizontal stabilizer (THS) passed from 3 to 13 degrees nose-up in about 1 minute and
remained in the latter position until the end of the flight.
Around fifteen seconds later, the speed displayed on the ISIS increased sharply towards 185 kt;
it was then consistent with the other recorded speed. The PF continued to make nose-up
inputs. The airplane’s altitude reached its maximum of about 38,000 ft, its pitch attitude and
angle of attack being 16 degrees.
Note: The inconsistency between the speeds displayed on the left side and on the ISIS lasted a little less
than one minute.
At around 2 h 11 min 40 , the Captain re-entered the cockpit. During the following seconds,
all of the
recorded speeds became invalid and the stall warning stopped.
At 2 h 12 min 02, the PF said "I don’t have any more indications", and the PNF said
"we have
no valid indications". At that moment, the thrust levers were in the IDLE detent and the
engines’ N1’s were at 55%. Around fifteen seconds later, the PF made pitch-down inputs. In
the following moments, the angle of attack decreased,
the speeds became valid again and the
stall warning sounded again.
Note: The inconsistency between the speeds displayed on the left side and on the ISIS lasted a little less
than one minute.
Make the math ... and the result is not "little less than one minute"