Summary
The FAA proposes to adopt a new airworthiness directive (AD) for all Airbus Model A330-223, -321, -322, and -323 airplanes. This proposed AD would require repetitive inspections of the firewall of the lower aft pylon fairing (LAPF), and corrective actions if necessary. This proposed AD is prompted by reports of cracking of the LAPF firewall. We are proposing this AD to detect and correct this cracking, which could reduce the effectiveness of the firewall and result in an uncontrolled engine fire.