When was that almost new AoA sensor changed for an older refurbished unit from Florida?
It was the same sensor on both notable Lion Air flights. The original sensor had developed an intermittent open that vexed the maintainers due to a slightly larger glob of epoxy than intended, opening with some relation to sensor heat being on or off or transitioning. The maintainers replaced it and the first flight with the new sensor is the one that flew safely under fully manual trim control.
The second flight crashed because the Captain transferred control to the First Officer. Until that point the Captain had maintained pitch trim. The First Officer, for reasons unknown, allowed nearly 90 pounds of pitch trim force to build up.
Had he been all alone the Captain on the second Lion Air flight would not have crashed. As soon as he set up for landing and deployed the flaps, MCAS would have stopped. He managed to disengage/did not engage the autopilot and the autothrottle, according to the airspeed disagree and the stall warning. He managed to keep the plane in trim. and he felt comfortable enough to hand over the controls while he looked at the manual.
After analyzing what the First Officer did, it seemed clear the main human failure was not remembering the trim system had an off switch and that the plane should be trimmed for neutral force in level flight before using it.
Did Sully make that claim before or after ET-302? Recall that Capt. Sullenberger's own testimony a few years earlier essentially put the blame on Ethiopian for not having 1500+ hours in both seats, which he stated was a minimum requirement that made his own safe emergency landing possible. If it was his testimony after ET-302, recall that Ethiopian misrepresented what happened and claimed the pilots followed every step exactly in the correct order. The truth that they failed to respond correctly, even before MCAS was enabled, was hidden in the FDR trace released a year later. I expect his statements were from believing what Ethiopian claimed was true.
The question was - why was any airline unaware of the problem after Lion Air? The preliminary report was 100% sufficient to determine cause, mitigation in flight, and identifying sequence and symptoms. ET-302 wasn't because anyone was silent. Their own report indicates they were well aware of MCAS before the crash.
Knowing the name is irrelevant. Knowing the symptoms is sufficient to identify the needed procedures. There is evidence Ethiopian knew the name. There is no evidence they ever knew the symptoms or the procedures as delivered to them.