Airworthiness Directives; Airbus SAS Airplanes

The FAA proposes to supersede Airworthiness Directive (AD) 2017-23-04, which applies to all Airbus SAS Model A300 B4-600R series airplanes; all Model A300 B4-603, B4-620, and B4-622 airplanes; all Model A300 C4-605R Variant F airplanes; and certain Model A300 F4-605R airplanes. AD 2017-23-04 requires an inspection of the upper wing skin and top stringer joints, and modification of the stringer joint couplings if necessary. Since the FAA issued AD 2017-23-04, it has been determined that additional airplanes may be subject to the identified unsafe condition. This proposed AD would continue to require the actions in AD 2017-23-04 and would add airplanes, as specified in a European Union Aviation Safety Agency (EASA) AD, which is proposed for incorporation by reference (IBR). This proposed AD would also remove certain airplanes from the applicability. The FAA is proposing this AD to address the unsafe condition on these products.