The Federal Aviation Administration (FAA) proposed a new airworthiness directive targeting specific Boeing 737 models. The directive applies to the 737-700, -700C, -800, -900, and -900ER series airplanes. The FAA initiated the proposal following reports of cracks found in the outward lower wing skin at a specific stringer end.
The proposed mandate requires operators to inspect the outboard lower wing skin on both wings for any existing repairs. Furthermore, the directive necessitates repetitive inspections designed to detect potential cracking. If cracks are discovered, operators must perform applicable on-condition actions.
The FAA states the action addresses an identified unsafe condition on these products. The comment period for the proposed directive remains open until February 26, 2026.