HazelNuts39
I recently posted that the THS remained parked at three degrees from the drop of autopilot to the threshold of STALL. It then moved NOSE UP to 13 degrees, where it remained...
Similarly, " The trimmable horizontal stabilizer (THS) began a nose-up movement and moved from 3 to 13 degrees pitch-up in about 1 minute and remained in the latter position until the end of the flight." ..(FINAL)
You posted that the THS had articulated during the climb. Referencing a document not in the Final Report, it was implied the HS was trimming...
Which is correct?
At 2:10:51, when the THS started its NU trim, the pilot was about to run out of elevator, and would have Stalled. With the extra degree/6 second rate of NU input, this creates an authority for Nose Up he had lacked on the way up. Does this create a problem?
Does there not appear to be some evidence the THS created a condition conducive to retention of NU into and through the STALL?
Why did the THS not follow the PILOTS NU in the climb? I asked before, no one proposed an answer.
What operational spec rules the inhibition of THS whilst climbing, and just at the payoff to STALL, it re-enters the flight path to keep NU?
DOZY, still waiting for a response from you re: what initiation and end rate did you observe in the descent with your ND full? Did the THS move at all? See, the way you phrase it, the THS did not move ND, but was fully ND after eight seconds. Can you clarify?