I would advise some caution about putting the initial DFDR traces under too much magnification. There has been some previous discussion about exactly how the data is recorded, where it is picked up, and how it is filtered. This might effect some of the timing issues if you are trying to parse cause and effect down to the seconds. I'm not saying you're wrong, but the investigation team will have the experts on hand to answer those kind of questions definitively.
One more thought..... The lowest flap setting on the 737 is Flaps 1. The significant configuration change going from Flaps 1 to Flaps Up is not the Trailing Edge (TE) Flaps going from 1 to 0. The significant change is the Leading Edge (LE) Flaps and the Slats retracting. The DFDR data released to date provides no information on the position of the leading edge devices. It is entirely possible that the signal for retracted flaps is tied to the LE devices, and not the TE Flaps. Again, don't know personally, but someone on the investigation team does.
Last edited by 737 Driver; 21st Apr 2019 at 01:11.
Reason: Added comment, typo