Action
Supplemental notice of proposed rulemaking (NPRM); reopening of comment period.
Summary
We are revising an earlier proposed airworthiness directive (AD) for certain Airbus Model A330-200 and -300 series airplanes; and Model A340-200 and -300 series airplanes. The NPRM proposed to supersede AD 2009-15-17 to continue to require inspections for damage to the protective treatments or any corrosion of all main landing gear (MLG) bogie beams, application of protective treatments, and corrective action if necessary. The NPRM also proposed to require modification of the MLG bogie beams, which would terminate the repetitive inspections for any modified bogie beam. The NPRM also proposed to allow optional methods of compliance for certain actions. The NPRM was prompted by reports of thin paint coats and paint degradation on enhanced MLG bogie beams, as well as reports that some airplanes have been inspected too early and not re-inspected as needed. This action revises the NPRM by revising the compliance times and adding a one-time inspection for airplanes that have been inspected too early. We are proposing this supplemental NPRM (SNPRM) to detect and correct damage or corrosion of the MLG bogie beams, which could cause a runway excursion event, bogie beam detachment from the airplane, or MLG collapse, which could result in damage to the airplane and injury to the occupants. Since these actions impose an additional burden over that proposed in the NPRM, we are reopening the comment period to allow the public the chance to comment on these proposed changes.