Summary
We propose to adopt a new airworthiness directive (AD) for the products listed above. This proposed AD results from mandatory continuing airworthiness information (MCAI) originated by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as: An A340 operator has reported an uncommanded engine N[deg]4 shut down during taxi after landing. The root cause of this event has been identified as failure of the fuel pump Non Return Valve (NRV) preventing the collector cell jet pump from working. This led to engine N[deg]4 collector cell fuel level to drop below the pump inlet and consequently causing engine N[deg]4 flame out. Multiple NRV failures in combination with failure modes trapping fuel could potentially increase the quantity of unusable fuel on aircraft possibly leading to fuel starvation which could result in engine in-flight shut down and would constitute an unsafe condition. The proposed AD would require actions that are intended to address the unsafe condition described in the MCAI.