PPRuNe Forums - View Single Post - AF 447 Thread no. 4
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Old 17th Jun 2011, 00:04
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GarageYears
 
Join Date: Jun 2009
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Zorin_75:

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.
Full text of the paragraph from the BEA.

Your version:

According to BEA, the THS passed from 3 to 13 degrees nose-up in about 1 minute at 2:10:51, 46 seconds after a/p disconnect. Even applying the least plausible interpretation to the report, that it was already arriving at 13 deg at 2:10:51, THS would just have started moving when the a/p disengaged.
Not saying the same thing are they. You are interpreting a version that assumes completion of THS movement at 2:10:51 (which is only 46 seconds and quite short of "about 1 minute" and since they have exact times, why not state 46 seconds?), my read is that starting around 2:10:51 the THS moved from 3 degrees NU to achieve 13 degrees about minute later.

You pick? Either is possible from the given text. Note the PF NU inputs (maintained) at and beyond 2:10:51... what would they do to the THS?
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