Airworthiness Directives; The Boeing Company Airplanes

FAA / Federal Register · 2019-26399

The FAA is adopting a new airworthiness directive (AD) for all The Boeing Company Model 737-300, -400, and -500 series airplanes. This AD was prompted by fuel system reviews conducted by the manufacturer. This AD requires 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 issuing this AD to address the unsafe condition on these products.