Airworthiness Directives; Airbus Airplanes

We propose to supersede Airworthiness Directive (AD) 2014-13- 17, for all Airbus Model A300 series airplanes; Airbus Model A300 B4- 600, B4-600R, and F4-600R series airplanes, and Model A300 C4-605R Variant F airplanes (collectively called Model A300-600 series airplanes); and Airbus Model A310 series airplanes. AD 2014-13-17 currently requires repetitive functional tests of the circuit breakers for the fuel pump power supply, and replacement of certain circuit breakers. Since we issued AD 2014-13-17, we have determined that installation of a newly developed fuel pump standard will better address the unsafe condition. This proposed AD would require installation of fuel pumps having the new standard, which would terminate the repetitive functional tests. We are proposing this AD to address the unsafe condition on these products.