Summary
This document proposes the adoption of a new airworthiness directive (AD) that is applicable to certain Dornier Model 328-100 and Model 328-300 series airplanes. This proposal would require repetitive detailed inspections of all attach caps of the passenger seats for cracks or defects; and replacement of the caps with new caps, if necessary. This action is necessary to prevent failure due to cracking of the seat frame attach caps on the passenger seat assemblies, which could result in separation of the passenger seat from the supporting structure during an emergency landing, hard landing, or turbulence, and consequent injury to the seat occupant. This action is intended to address the identified unsafe condition.