Discussion \n\n\n\tThe FAA issued a notice of proposed rulemaking (NPRM) to amend 14 CFR part 39 by adding an AD that would apply to all Airbus SAS Model A330-200 Freighter series airplanes. The NPRM published in the Federal Register on May 7, 2019 (84 FR 19891). The NPRM was prompted by reports of cracked flexible hoses of the OCCDS on A330 freighter airplanes. The NPRM proposed to require repetitive detailed inspections, including functional testing, of the OCCDS and replacement of affected part(s) if necessary. \n\tThe FAA is issuing this AD to address cracked oxygen hoses. This condition, if not addressed, could lead to oxygen leakage in the flexible hose of the OCCDS, which, in combination with in-flight depressurization, smoke in the flight deck, or a smoke evacuation procedure, could result in crew injury and reduced control of the airplane. \n\tThe EASA, which is the Technical Agent for the Member States of the European Union, has issued EASA AD 2019-0027, dated February 4, 2019 (''EASA AD 2019-0027'') (referred to after this as the Mandatory Continuing Airworthiness Information, or ''the MCAI''), to correct an unsafe condition for all Airbus SAS Model A330-200 Freighter series airplanes. The MCAI states: \n\n\n\tSeveral occurrences were reported of finding cracked flexible hoses (part number) P/N 32209-series of the OCCDS on A330 freighter aeroplanes. These flexible hoses are steel braided hoses with polyurethane (PUR) inner tubes and steel inner springs. On A330 freighter aeroplanes, these hoses are located in the courier area and are not pressurized during normal operation. \n\tThis condition, if not detected and corrected, could lead to oxygen leakage in the flexible hose of the OCCDS, which, in combination with in-flight depressurization, smoke in cockpit or smoke evacuation procedure, could possibly result in cockpit crew injury and reduced control of the aeroplane. \n\tTo address this potential unsafe condition, Airbus issuedthe SB (service bulletin) to provide inspection instructions. \n\tFor the reasons described above, this (EASA) AD requires repetitive detailed inspections (DET), including functional testing, of the OCCDS and, depending on findings, replacement of affected part(s). \n\n\n\tYou may examine the MCAI in the AD docket on the internet at http://www.regulations.gov by searching for and locating Docket No. FAA-2019- 0255. \n\nComments \n\n\n\tThe FAA gave the public the opportunity to participate in developing this final rule. The FAA received no comments on the NPRM or on the determination of the cost to the public. \n\nConclusion \n\n\n\tThe FAA reviewed the relevant data and determined that air safety and the public interest require adopting this final rule as proposed, except for minor editorial changes. The FAA has determined that these minor changes: \n\tAre consistent with the intent that was proposed in the NPRM for addressing the unsafe condition; and \n\tDo not add any additional burden upon the public than was already proposed in the NPRM. \n\nRelated IBR Material Under 1 CFR Part 51 \n\n\n\tEASA AD 2019-0027 describes procedures for repetitive inspections and replacement of OCCDS flexible \n\n((Page 37958)) \n\nhoses. This material is reasonably available because the interested parties have access to it through their normal course of business or by the means identified in the ADDRESSES section. \n\nCosts of Compliance \n\n\n\tThe FAA estimates that this AD affects 5 airplanes of U.S. registry. The FAA estimates the following costs to comply with this AD: \n\n\n\tEstimated Costs For Required Actions ---------------------------------------------------------------------------------------------------------------- \n\tCost per Cost on U.S. \n\tLabor cost Parts cost product operators ---------------------------------------------------------------------------------------------------------------- 14 work-hours x $85 per hour = $1,190........................ $0 $1,190 $5,950 ---------------------------------------------------------------------------------------------------------------- \n\n\n\tAccording to the manufacturer, some or all of the costs of this AD may be covered under warranty, thereby reducing the cost impact on affected individuals. The FAA does not control warranty coverage for affected individuals. As a result, the FAA has included all known costs in the cost estimate. \n\nAuthority for This Rulemaking \n\n\n\tTitle 49 of the United States Code specifies the FAA's authority to issue rules on aviation safety. Subtitle I, section 106, describes the authority of the FAA Administrator. Subtitle VII: Aviation Programs, describes in more detail the scope of the Agency's authority. \n\tThe FAA is issuing this rulemaking under the authority described in Subtitle VII, Part A, Subpart III, Section 44701: ''General requirements.'' Under that section, Congress charges the FAA with promoting safe flight of civil aircraft in air commerce by prescribing regulations for practices, methods, and procedures the Administrator finds necessary for safety in air commerce. This regulation is within the scope of that authority because it addresses an unsafe condition that is likely to exist or develop on products identified in this rulemaking action. \n\tThis AD is issued in accordance with authority delegated by the Executive Director, Aircraft Certification Service, as authorized by FAA Order 8000.51C. In accordance with that order, issuance of ADs is normally a function of the Compliance and Airworthiness Division, but during this transition period, the Executive Director has delegated the authority to issue ADs applicable to transport category airplanes and associated appliances to the Director of the System Oversight Division. \n\nRegulatory Findings \n\n\n\tThis AD will not have federalism implications under Executive Order 13132. This AD will not have a substantial direct effect on the States, on the relationship between the national government and the States, or on the distribution of power and responsibilities among the various levels of government. \n\tFor the reasons discussed above, I certify that this AD: \n\t(1) Is not a ''significant regulatory action'' under Executive Order 12866, \n\t(2) Will not affect intrastate aviation in Alaska, and \n\t(3) Will not have a significant economic impact, positive or negative, on a substantial number of small entities under the criteria of the Regulatory Flexibility Act. \n\nList of Subjects in 14 CFR Part 39 \n\n\n\tAir transportation, Aircraft, Aviation safety, Incorporation by reference, Safety.