Airworthiness Directives; Airbus 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 Airbus Model A310-200 and -300 Series Airplanes

Resumo

The FAA proposes to adopt a new airworthiness directive (AD) for all Airbus 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 A310-200 and -300 series airplanes. This proposed AD would require a one-time inspection of the trimmable horizontal stabilizer actuator (THSA), corrective actions if necessary, and follow-on repetitive tasks. This proposed AD is prompted by reports of THSAs that have reached their design operational life. This operational life can be extended provided an initial inspection and follow-on repetitive tasks are accomplished. We are proposing this AD to extend the operational life of the THSA to prevent a possible failure of high-time units, which could result in reduced controllability of the airplane.