EASA AD US-2019-08-03
Fuselage - Section 43 Lower Lobe Frames - Inspection
Federal Aviation Administration Airworthiness Directive 2019-08-03 is a final rule addressing certain Boeing 737-100, -200, -200C, -300, -400, and -500 series airplanes. It mandates repetitive detailed, general visual, and high frequency eddy current inspections of the section 43 lower lobe frames between station 380 and station 520, as well as inspections to identify certain repairs and applicable on-condition actions. This directive aims to detect and mitigate frame web and integral inboard chord cracking below the passenger floor.