Airworthiness Directives; Airbus Model 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)

The FAA is superseding an existing airworthiness directive (AD), which applies to certain Airbus Model 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). That AD currently requires modifying the ram air turbine (RAT) by replacing the ejection jack. This new AD requires a one-time inspection of the RAT ejection jack to determine the part number, and further investigative and corrective actions if necessary. This AD is prompted by the discovery of a rupture in the housing of one of the RAT ejection jacks installed as specified in the existing AD. We are issuing this AD to prevent rupture of the housing of the RAT ejection jack due to overpressure in the jack caused by overfilling the hydraulic fluid, and consequent failure of the RAT ejection jack. Failure of the ejection jack could result in a lack of hydraulic pressure or electrical power in an emergency.