Summary
We propose to adopt a new airworthiness directive (AD) for all Weatherly Aircraft Company (Weatherly) Models 201, 201A, 201B, 201C, 620, 620A, 620B, 620B-TG, and 620TP airplanes. This proposed AD was prompted by reports of fatigue cracking of the center wing and outer wing spar hinge brackets due to corrosion pitting. This proposed AD would require repetitive inspections of the wing hinge brackets, pins, and wing spar structure with repair or replacement of parts as necessary. We are proposing this AD to address the unsafe condition on these products.