Summary
This document proposes to adopt a new airworthiness directive (AD) that would apply to certain Reims Aviation S.A. (Reims) Model F406 airplanes. The proposed AD would require repetitively inspecting the canted rib upper cap in the center wing carry-through area for cracks, and, if cracks are found, immediately repairing the cracks or modifying this area depending on the extent of any cracks found. The proposed AD would also require modifying the canted rib upper cap at a certain time period as terminating action for the proposed repetitive inspections. The proposed AD is the result of mandatory continuing airworthiness information (MCAI) issued by the airworthiness authority for France. The actions specified by the proposed AD are intended to detect and correct cracks in the canted rib upper cap in the center wing carry-through area, which could result in structural failure of the wing with possible loss of control of the airplane.