Airworthiness Directive Proposal for Air Tractor, Inc. Airplanes

Summary

The Federal Aviation Administration proposes to revise Airworthiness Directive 2006-08-08 for certain Air Tractor, Inc. Models AT-400, AT-401, AT-401B, AT-402, AT-402A, and AT-402B airplanes to reduce repetitive inspections and prevent fatigue cracks in the wing lower spar cap.