Airworthiness Directives; British Aerospace Model BAC 1-11 200 and 400 Series Airplanes

The FAA is adopting a new airworthiness directive (AD) for all British Aerospace Model BAC 1-11 200 and 400 series airplanes. This AD requires revising the airplane flight manual (AFM) to contain applicable AFM amendments, which advise the flightcrew of information pertaining to safely operating the fuel system. The AD also requires revising the FAA-approved maintenance program to include certain repetitive maintenance tasks intended to improve the safety of the fuel system. This AD results from fuel system reviews conducted by the manufacturer. We are issuing this AD to prevent potential ignition sources inside the fuel system, which, in combination with flammable fuel vapors, could result in a fuel tank explosion and consequent loss of the airplane.