Regarding this GA button issue. From what I have read here, the button is only armed when flaps are not "0"
I assume that selection of flaps 1 causes the LED's to extend.
If that is so, surely they would have been blown off the airplane by the time it reached 425 knots going down.
However the NTSB said they found a very small debris field and there has neen no mention of parts and pieces being found elsewhere.