Yes, an airworthiness directive applies to each product identified in the airworthiness directive, even if an individual product has been changed by modifying, altering, or repairing it in the area addressed by the airworthiness directive.
source: Docket No. FAA-2000-8460, 67 FR 48003, July 22, 2002, unless otherwise noted.
cite as: 14 CFR 39.15