Summary
The FAA proposes to adopt a new airworthiness directive (AD) for all The Boeing Company Model 737-300, -400, and -500 series airplanes. This proposed AD was prompted by fuel system reviews conducted by the manufacturer. This proposed AD would require applying sealant to the fasteners in the fuel tanks, replacing wire bundle clamps external to the fuel tanks and installing Teflon sleeving under the clamps. The FAA is proposing this AD to address the unsafe condition on these products.