Department of Transportation February 16, 2011 – Federal Register Recent Federal Regulation Documents

We propose to adopt a new airworthiness directive (AD) for the products listed above that would supersede an existing AD. This proposed AD results from mandatory continuing airworthiness information (MCAI) originated by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as:

The FAA proposes to abandon its separation requirements at launch sites for storing liquid oxygen, nitrogen tetroxide, hydrogen peroxide in concentrations equal to or below 91 percent, and refined petroleum-1 (RP-1) unless they are within an intraline distance of another incompatible energetic liquid, or will be co-located on a launch vehicle. The FAA's current separation requirements for storing these energetic liquids unnecessarily duplicate the requirements of other regulatory regimes. The FAA also proposes to reduce the separation distances required for division 1.1 explosives and liquid propellants with trinitrotoluene (TNT) equivalents of less than or equal to 450 pounds. The revised separation requirements reflect protection against fragment hazards, the main hazard at these quantities. The FAA would impose a new formula for determining distances to public areas containing a member of the public in the open. Finally, the FAA would reduce the separation distances for division 1.3 explosives as well. The proposed rule would increase flexibility for launch site operators in site planning for the storage and handling of explosives.

This notice contains a summary of a petition seeking relief from specified requirements of 14 CFR. The purpose of this notice is to improve the public's awareness of, and participation in, this aspect of FAA's regulatory activities. Neither publication of this notice nor the inclusion or omission of information in the summary is intended to affect the legal status of the petition or its final disposition.

This action proposes special conditions for the Gulfstream GVI airplane. This airplane will have novel or unusual design features when compared to the state of technology envisioned in the airworthiness standards for transport category airplanes. These design features include a high speed protection system. These proposed special conditions contain the additional safety standards that the Administrator considers necessary to establish a level of safety equivalent to that established by the existing airworthiness standards.

The Surface Transportation Board (STB or Board) has instituted a proceeding to clarify, update, and seek public comments on proposed changes to its existing regulations and procedures regarding the use of railroad rights-of-way for railbanking and interim trail use under the National Trails System Act (Trails Act).