Only one poster refuted the comparison to AMW 5481. Since I knew the CA and was at her funeral, I'll reiterate what that single individual said because Katie and Jonathan deserve that much.

AMW 5481 was caused by improper rigging of the elevator/trim system performed by contract (outsourced) maintenance. They were within the CG envelope using approved weights. It was the misrigging that improperly moved the aft CG limit forward just enough to make the A/C's actual CG too far aft to fly.