Federal Aviation Administration January 30, 2006 – Federal Register Recent Federal Regulation Documents
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Airworthiness Directives; Rolls-Royce plc RB211 Series Turbofan Engines
The FAA proposes to supersede an existing airworthiness directive (AD) for Rolls-Royce plc (RR) models RB211-535E4-37, RB211- 535E4-B-37, RB211-535C-37, RB211-535E4-B-75, RB211-535E4-C, and RB211- 22B-02 turbofan engines. That AD currently requires inspecting certain high pressure (HP) turbine discs, manufactured between 1989 and 1999, for cracks in the rim cooling air holes, and, if necessary, replacing the discs with serviceable parts. This proposed AD would require the same inspections, and would reduce the compliance times for eddy current inspection (ECI) for the RR RB211-22B-02 engines. This proposed AD results from the manufacturer reducing their recommended compliance times for inspections on RB211-22B-02 engines. We are proposing this AD to prevent possible disc failure, which could result in an uncontained engine failure and damage to the airplane.
Proposed Modification of Restricted Areas R-3002A, B, C, D, E, and F; and Establishment of Restricted Area R-3002G; Fort Benning, GA
This action proposes to modify the boundaries of the Restricted Area R-3002 range complex at Fort Benning, GA. The U.S. Army proposed these modifications as a result of a land exchange agreement between Fort Benning and the City of Columbus, GA. Specifically, the proposal would eliminate restricted airspace over a parcel of land that has been transferred from the Army to the City of Columbus. The proposal would also add new restricted airspace over a parcel of land to the south of the current restricted area complex, that was ceded by the City to the Army. In addition, a portion of the southwest section of R-3002, within the existing restricted airspace, would be redesignated as a separate restricted area, R-3002G, to better accommodate instrument approach procedures at Lawson Army Air Field (AAF). The internal boundaries between restricted area subdivisions would also be realigned slightly to permit more efficient scheduling and utilization of the range complex. Finally, the names of the controlling agency and using agency for the restricted areas would be changed to reflect their current titles.
Advisory Circular 25.856-2, Installation of Thermal/Acoustic Insulation for Burnthrough Protection
This notice announces the issuance of Advisory Circular 25.856-2, ``Installation of Thermal/Acoustic Insulation for Burnthrough Protection.'' The advisory circular provides information and guidance regarding an acceptable means, but not the only means, of compliance with the portions of the airworthiness standards for transport category airplanes that deal with the installation of thermal/acoustic insulation.
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