Summary
We propose to supersede Airworthiness Directive (AD) 2011-10- 17, for all Airbus Model A300 and A310 series airplanes, and Model A300 B4-600, B4-600R, and F4-600R series airplanes, and Model C4-605R Variant F airplanes (collectively called A300-600 series airplanes). AD 2011-10-17 currently requires revising the maintenance program by incorporating certain airworthiness limitation items (ALIs). Since we issued AD 2011-10-17, the manufacturer has revised certain ALI documents, which specify more restrictive instructions and/or airworthiness limitations. This proposed AD would require revising the maintenance or inspection program, as applicable, to incorporate new or revised structural inspection requirements. This proposed AD would also remove Model A310 and A300-600 series airplanes from the applicability. We are proposing this AD to detect and correct fatigue cracking, damage, and corrosion in certain structure; such fatigue cracking, damage, and corrosion could result in reduced structural integrity of the airplane.