Ok, I found some time to play with Excel, learned how to master the 54,5 average samples per second timeline and combine parameters. Would someone please crosscheck, cause I had worked a lot with formatting the data and correlate events. Source is the public docket at NTSB, file number 66 containing reformatted FDR data as csv file.
Some had interest in the elevator split.I tried to determine the start and end of it. Here the two Elevator parameters in degree, starting 10 seconds before G/A and ending with the last recorded data.
Note that left and right Elevator were recorded alternating with half a second offset, so you can't precisely compare both at the same time.
12:38:44 there might have been a first and short elevator split.
3 seconds later there's a definite split, confirmed in the report.
Then I added 2 parameters, Control Column Left in Degrees (the only one recorded)
And Horizontal Stab Trim Units (Scale right of diagram).
Controls:
Seems as if the CPT held the Column at -4°, while the F/O broke off by pushing.
After 3 seconds CPT reduced to like neutral. He didn't pull, but was he feeling force from the spring connection mechanism between the 2 systems?
After another 7 seconds both pilots pulled almost simultaniously.
Trim:
Interesting. Dunno 767. Is that A/P's revenge (hasn't been disengaged) or is that pilot trim?
(Graphs and Analysis my property, all rights with me)