Summary
The FAA is revising an earlier NPRM for an airworthiness directive (AD) that applies to certain BAE Systems (Operations) Limited Model BAe 146 airplanes. The original NPRM would have required repetitive inspections to measure the depth of chafing or scoring in the skin along the full length of the wing-to-fuselage fairing from forward to aft ends at the contact between the seal and fuselage, and related investigative/corrective actions if necessary. The original NPRM resulted from a report of chafing in this area. This action revises the original NPRM by removing certain credit for prior accomplishment of proposed requirements. We are proposing this supplemental NPRM to detect and correct such chafing or scoring, which could result in reduced structural integrity of the fuselage.