Summary
We propose to adopt a new airworthiness directive (AD) for certain The Boeing Company Model 737-200, -200C, -300, -400, and -500 airplanes. This proposed AD was prompted by reports of cracking in the lower lobe skin panel assemblies of the fuselage. This proposed AD would require replacement of lower lobe skin panel assemblies, and detailed inspections for scribe lines and applicable on-condition actions. We are proposing this AD to address the unsafe condition on these products.