AD FAA-2011-1225

We are adopting a new airworthiness directive (AD) for certain Airbus Model A300 B4-2C, B4-103, and B4-203 airplanes; Model A300 B4- 600, B4-600R, and F4-600R series airplanes, and Model C4-605R Variant F airplanes (collectively called A300-600 series airplanes); and Model A310 series airplanes. This AD was prompted by reports of cracking in the forward lug wing of the aft bearing at rib 5 of the main landing gear (MLG). This AD requires installing new bushes with increased interference fit in the forward lug wing of the aft bearing at rib 5 of the MLG on the right-hand (RH) and left-hand (LH) wing. We are issuing this AD to prevent cracking of the forward lug wing of the aft bearing at rib 5 of the MLG, which could adversely affect the structural integrity of the MLG attachment, and could result in the collapse of the MLG.