Federal Aviation Administration June 10, 2013 – Federal Register Recent Federal Regulation Documents

We propose to adopt a new airworthiness directive (AD) for all CFM56-3 and CFM56-7B series turbofan engines with certain accessory gearboxes (AGBs) not equipped with a handcranking pad ``oil dynamic seal'' assembly. This proposed AD was prompted by 42 events of total loss of engine oil from CFM56 series turbofan engines while in flight. This proposed AD would require an independent inspection to verify re- installation of the handcranking pad cover after removal of the pad cover for maintenance until installation of a handcranking pad oil dynamic seal assembly. This inspection requirement exceeds normal maintenance and is necessary due to the design and location of the handcranking pad cover on the accessory gear box. We are proposing this AD to prevent loss of engine oil while in flight, which could result in engine failure, loss of thrust control, and damage to the airplane.

This action proposes to modify Class D and E airspace at Kenai, AK, to accommodate aircraft departing and arriving under Instrument Flight Rules (IFR) at Kenai Municipal Airport. A minor adjustment also would be made to the geographic coordinates of the airport. This action, initiated by the biennial review of the Kenai airspace area, would enhance the safety and management of aircraft operations at the airport.

This rule establishes, amends, suspends, or revokes Standard Instrument Approach Procedures (SIAPs) and associated Takeoff Minimums and Obstacle Departure Procedures for operations at certain airports. These regulatory actions are needed because of the adoption of new or revised criteria, or because of changes occurring in the National Airspace System, such as the commissioning of new navigational facilities, adding new obstacles, or changing air traffic requirements. These changes are designed to provide safe and efficient use of the navigable airspace and to promote safe flight operations under instrument flight rules at the affected airports.

This action modifies Class E airspace at Greenlee County Airport, Clifton/Morenci, AZ, to accommodate aircraft using Area Navigation (RNAV) Global Positioning System (GPS) standard instrument approach procedures at Greenlee County Airport. This improves the safety and management of Instrument Flight Rules (IFR) operations at the airport.

This action establishes Class E airspace at Blue Mesa VHF Omni-Directional Radio Range/Distance Measuring Equipment (VOR/DME), Blue Mesa, CO, to facilitate vectoring of Instrument Flight Rules (IFR) aircraft under control of Denver and Albuquerque Air Route Traffic Control Centers (ARTCCs). This improves the safety and management of IFR operations within the National Airspace System.

This action modifies Class E airspace at Bend, OR, to accommodate aircraft departing and arriving under Instrument Flight Rules (IFR) at Bend Municipal Airport. This improves the safety and management of IFR operations at the airport. This action also makes some editorial changes for clarity. This action also adjusts the geographic coordinates of the airport.

We are adopting a new airworthiness directive (AD) for all Rolls-Royce plc (RR) Viper Mk. 601-22 turbojet engines. This AD requires reducing the life of certain critical parts. This AD was prompted by a review carried out by RR of the lives of these parts. We are issuing this AD to prevent failure of life-limited parts, damage to the engine, and damage to the airplane.