WASHINGTON — Amtrak’s Office of Inspector General today issued a report highly critical of a manufacturing process that has led to defects preventing Amtrak from accepting any of the 12 of 28 New Acela trainsets and 22 of 28 café cars already produced at Alstom’s Hornell, N.Y., facility. The 38-page report contains redactions of monetary amounts “due to [their] sensitive nature,”